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 0x7db7c3b9b73c6d223c85cf3c0cd6352351619599f39d68d7248d686a08973c7b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed9b8153-b540-4a37-af7c-57ff4cf182f5.json and https://artists.proofprofile.net/proofs/artist/ed9b8153-b540-4a37-af7c-57ff4cf182f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x160dbf852ff746dc62d3faec4874ca881bcafc35a7c1889f7a34ca80c0f98ad9. 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/TR0141809204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc56d0fe716a68d7d345d89aa238b122135f4ad8c4ee3388ba3da1c88247804f. 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/TR0141809205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bac0b79c6cb61d10808d1117f3d321d06279e761c6ea305fd93e82a9de1f698. 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/TR0141809206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4235d8d7cc18aeaee5c3185501b2704a0bd6ede0ffefb64c383cbd37457d6b07. 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/TR0141809207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37297000388e0db80815f8c595483f5adac82431ee2189627dfc79ce213c107b. 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/TR0141809209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243b7f4e6fabbf0f4d4ead02ac865045986c30526b83ff6e7aaf66e617c14fa4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TR0141809211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6248a52926a91e4dcfa6659c0e0b40eeeb695d65f34952d21553f88ca01b1866. 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/TR0141809212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dbb473772d09ef5a126a114d151edcb30ee50b6896a5e2a625a9675f2ecb8c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TR0141809214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4411698b06ce914efdbd521a34b00659abee862556d84d5b5f2b02ba050e419a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR0141809216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2750e415473d18c6f190bb7a56a1f3b75be2ba634ab6f731d7c8572d80528537. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0141809217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda589d31cbaeef7f4bbebaaeab012b3163a3f6d613d36e7d1d4f98a3133a02ac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0141809219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c22937e8d3ed2dd813bec1b3315feba86a0639e0e866cf5b6ec1c7e22dbcd74. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TR0141809220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc887b238388073ec291406d9eba10953c3967c132ac0913c1daff38a5a708454. 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/TR0141809222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383611278f769ecf630a32dbf42b025c02b1255dbe725c10f981af6dde9808a7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR0141809224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba5191bc217a90033e0903aab3dfb7db35175a0ad9663fba70ff6c9e1dc7ff8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TR0141809225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2b82a14bd66ccfe3c8b3328fe8d8441b34d5adf4bbde906923678b4cf83697. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0141809226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe31a822c5f67e375ab0e876807ff4f21e3624ab8413bd29c708123606316c62. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TR0141809208.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cee6d518dd370703dcdaf818a28faa975d5d7fc631e32762f2e7c651c71f8a8. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TR0141809210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e0a4756a344a40a9bba408f0615eb9bf9276502d5163cf4320114bd17f9aa1. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TR0141809213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681ee67ddce1d6f1e21a24a10466876c4c50df9ceadfa14c40826991e181c702. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TR0141809215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6004675476320fb3699e16f89f2b4a518556a3769146b73a4e18523768998b98. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TR0141809218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2df542e9c796bab14021b22564adaa723c8177ba89ff9f0b8c66806d8c873a8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TR0141809221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3280b65ef20f81b2efeb016ae2296ba2a47190ebd4e8f00f803de4f0aa1a2d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TR0141809223.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38671439618c9b1f9e21f6ee600f5f4f869072c74fc6e03ee3c8bbe6356d9530. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TR0141810103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc822be6b236d9469180706dc3a4f3eaf52c56da8e8944f91f7683038ae9ff5f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR0141810104.