Sneaky Sound System is an Australian dance music group formed in late 2001 by Angus McDonald on guitar, MC Double D (Daimon Downey) on vocoder and vocals, Damien Hesse (DJ) and Nick Broadhurst on saxo
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b7ca9d18715a6a14d96239f407c64249b578f0b22c281e5d587469671f9dd7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc0ea94a-ca54-4343-aee4-3e95f3d2da12.json and https://artists.proofprofile.net/proofs/artist/fc0ea94a-ca54-4343-aee4-3e95f3d2da12.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cb6bf972ba3751b69f2ec94fcb82469b7d33829d70ac534ddbe87496063665. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d98c7f8f3627d60ce06a047493ea8c7bf2837376aa91839a71c519be7c3c08. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00600018.
You Should Have Told Me You Were Gonna Change
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c3f0d92c1cd8b8b7326d9eba01b4140c8d21995198be6dc296a5c294d5712e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ce2346475b38923f916a34c4d73d3a3b6fa6553ac63b86f6af3c425beb862e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7b2ee3d1bb24f5ca6065f239235ccfd99d7785db5671fc5ae5096f318d9d5e. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344d66c9f355ed424939d6dfb984dd898de6618747ceb0b5c060cf95858e8962. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c493ef59fb7f3a6bbe06faf3ef748143fe82a497b4bc93b7f06c4eeb30df2c4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afde18d182e6f683a023fa855379a7bcaaf99916c0172c25dced2783f9ce441. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0552f07b7b8c06e62a36762aa74c2d9b1068b4794c0f5cfc0fad60af25c7b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5ff940bbd27dca4f6b95b3bd542889a2ada350184c2d0ec7a11a37fbd2d8a2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90bd65720617b6555967faf4cb3c4867669e713374292b410a13e4b382edfd4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d194f70110ed5dc0de11bd15faad059c3ca2de76a84b41727f861042dae9910. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfb6eb81e5209aaabaa8ac249a5aa24c35d0c0965f85a552ce5a2ac7c9ac7db. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5a2a0357b69b488e74cda006a9fd598e95797387410df2418d313615da4220. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ffc7d6a94ce6de61d0eb63a2a42a49aaeb7a0a66ce91db76700e22279f3d4c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7e79f8ad199c89e89465aaf5200d36c7019bcbc9a1e02750a6596128f97c3c. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dedaee0b3c03642f086621397d18801dc179dcca68db199d2e17163a60d62cd. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUQK00800066.
UFO [Bimbo Jones Twist Mix] (1-track DMD)
It's Not My Problem [Thin White Duke Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff519ce7019590ca19974fd0283310d2d3bd891c1bdb80465da120b14bd087d8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUUM71100611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6374aa6ed594db07783f4e2708f009270a6adc327f790250c40a1efcac6d411. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:10:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUUM71100905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed4b06ccd4181012fe21d68357066d47ef277ef7b03545dd7636e93c3ef5218. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUUM71100907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff06fa8fae555bf7fc67f40e6e4696d27d1d1bd343ce27875feafe4295bba1e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQY51595821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff06fa8fae555bf7fc67f40e6e4696d27d1d1bd343ce27875feafe4295bba1e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQY51595821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc932aeb923082e1050e707c4e4c4d695bd6b8a8c0c8eb431e39359617777a01a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1569269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc932aeb923082e1050e707c4e4c4d695bd6b8a8c0c8eb431e39359617777a01a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1569269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38da5e3c307a7aa4e410311d3f1cc70cb8d668c4f42bdec2df11d604be44ebd6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1623278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a01fabb9735498053f358eeac0759b6a8a7989d04f1a802fe360ef6a440e8b7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:06:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUDCB1701043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d1a9d6e4d0e3fafa0ec224602cd7bff2169da179105d2d9d78c24ebefd1679. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUNV01700162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d1a9d6e4d0e3fafa0ec224602cd7bff2169da179105d2d9d78c24ebefd1679. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUNV01700162.
Can't Help The Way That I Feel (David Penn Remix)
Can't Help the Way That I Feel - David Penn Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbb85c63931cbddb8d2af948b72c27cc2f78de82c6fad484aa419acff24431a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHAD1801027.
Can't Help the Way That I Feel (David Penn Remix)
Can't Help The Way That I Feel (Remixes)
Can't Help the Way That I Feel (David Penn Short Remix)
Can't Help the Way That I Feel (David Penn Remix - Shorter Edit)
Can't Help The Way That I Feel (David Penn Remix - Shorter Edit)
Can't Help The Way That I Feel (The Works)
Can't Help the Way That I Feel (The Works)
Can't Help The Way That I Feel (Smokin' Jack Hill Vibes Remix)
Can't Help The Way That I Feel - Smokin' Jack Hill Vibes Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaad132e0d180fa338172afa77e9f5cc8c1401648fa4c31ff1a6e0a2c7078229. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHAD1901294.
Can't Help The Way That I Feel (David Penn 2019 Edit)
Can't Help the Way That I Feel (David Penn 2019 Edit)
Can't Help The Way That I Feel (Smokin' Jack Hill Vibes Remix - Extended Mix)
Can't Help the Way That I Feel (Smokin' Jack Hill Vibes Remix) [Extended Mix]
Can't Help The Way That I Feel (David Penn Full Vocal Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175dd80d4b177fbf380f557094562f4f7cb1b71a876aee84be1199985aaecc2a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHAD1901835.
We Belong (Full Vocal Mix - Extended Mix)
Can't Help The Way That I Feel - David Penn Remix - MIxed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18704cea004be65a86937dd811003cefbb9c565252af3aba7a806bd11490250. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHAD2002358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37e2b66670bfb627259d08afe0f1a70842ebbe74ea03e484e09d909cf9f48ae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBFTG0900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b0db58e62e80ab94354729442497e164437048c2eda76f0bc7a5587dbb61ea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBFTG0900039.
I Will Be Here (feat. Sneaky Sound System)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c99d00a5a9b9f786edb44f11fa3b3d22e125f211ff44b0c17d81960849c829. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEP010900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd4e7ff5f5a3c9ab1ac91677aa562c8d745c2134943f0f1f4f9ba42c2f8dce7. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:57:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBTEZ1400720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9250d24cad695f4aa39808e29f59308542bc2405bb5fa7fd2d4402fd2a60de42. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABT1467491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c94d3f01127d603752bbb1aa3aee94dca0ff9e52767dec53fb1e29672b7e20. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBFTG0900044.
Can't Help the Way That I Feel - David Penn Remix [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fdca3300bb137a5db8ed2d6d0a1423d98db486a13b9b0df2ee99afee826560. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN061900014.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch