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 0xfef4df229112cffb77837d3d0925e221301671e77765b2a91eec25ca29eba42f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebd7ca6f-a682-45cc-94d8-6b82b8c26762.json and https://artists.proofprofile.net/proofs/artist/ebd7ca6f-a682-45cc-94d8-6b82b8c26762.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 0xe85efbe75847105e83d6d08d15a01f5aa1fc9cdc09135fd1b7f9f827e559edb9. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:33Z), 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/RSA221991487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d143db62b2279d1d3d2ec0548fd0fefc1373f67c221104cf21446a8ddfcc7e. 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/RSA221991488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aaa4d74648dd59420697d34c66f03b66982bde5afb00fe98ef2133913a44f2. 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/RSA221991489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d5575b12b54623051c2554f2830173559fd4a9cf9cb520b2113e53f568d9e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/RSA221991499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b95f4c5075ecc9a7e73ee4f2848dcba82ead4cc255d6e062b09f4531ab888a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/RSA221991504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22e07d7c8ae5b5f8bf665a291ff1a9c16d841d52b73be8a9f8fc06de083b0a3. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/ATR980015552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f19d79307ab96e9e72ebb7587f6e0a0aaeba97e6115bc83a668adf313c03f1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:12Z), 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/ATR980015554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302195da6ff2c4931935a8f38d346019f2cd218a7c24dcdbbb38ee77993a3f72. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/RSA131601505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8039ff0397c37be5472e4d3903265cd62af6a26f26b4faeafb2c3553661a0998. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RSA131601511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc05ae098df541c42217b3b2c1a5102be12dff52d7548cdae02f848f6009dc04. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:26:39Z), 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/RSA131601512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415e7d44e94630d1dc317b06e5017e8a05326f7e01a3516e300e1810382f9841. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:29:13Z), 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/RSA131601515.
Opet Tu (feat. Arafat i Furio Giunta, Eeva i DJ BKO, Ill G, Ziplok, Bvana i Seven, DJ Munja, Khan, VIP, Lud & Borko THC)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b35209bd19886f1649981e16b1c88aa76e7f1e3fce965565678f1c9658c86a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/RSA221500442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd695c8f7ab0ad15804ebf594993023541c900920c4c5b32fde6fca0a6bbb35a6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/RSA221500444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8433c7e3df98af120d18438f2e5d2a23dffb9f437f65e2a27546ee68caabd32. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/RSA221500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4535fbf43b91015d3b5ea35f0f2d42073547aed546dd3610246da29173c88f. 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/RSA221500447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0bcc3c3858b94121348af60be2426e4fde0facb890a7a8c8c616c988b04a82. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/RSA221500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fbd6c1e29eaf5031dcb831ad08429401543e6c8df35bb017983b89bba4299e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/RSA221500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e5680d88e3d047e116f61350759c2eed88df41c2294c0d1cf1f8586558882f. 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/RSA221500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40781a98c0cb4bbf1ad957300e96fd8d99292d566a6963fc286b0b11aabf2a4c. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-21T20:43:17Z), 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/RSA221500452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04ea69fbf11d060ec715962a4539e742d4221186bc945e4f56705e571d18a35. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RSA221601880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84459be98e196630180ea5c1ef882a6ebd9b7e634d480501def006e1fdce161c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/RSA221601888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1befbaccc1e334fd2649aef69f37dc3be2fd555e883a5c109ee3becff9051fe7. 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/RSA131701310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e8239fb7c4e3c4304a7901e39d347ccdeb3a5de8363fd3dbd70c0e5ccf505b. 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/RSA132200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6525baba3382ad8f958458ef2e1f914f6ab03e62dcab93e64b67b9bf4e277ba. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RSA221601925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1befbaccc1e334fd2649aef69f37dc3be2fd555e883a5c109ee3becff9051fe7. 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/RSA131701310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbbc19d8a356e1a69d7c26da64ee9decee818f21469a8c6eff8905f19b092e9. 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/RSA131701311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d8ec0cede44aa3e83af7579fcb22cf7d4f45ac90733101964ea700f709fbbd. 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/RSA221991655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4cf378d260de036642c0cb9eb67b7262c1480f3e4e5c22db4cf1d9a181f016. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/RSA221991459.
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 0xeb40a724a494f8a03b393212c0dc007c6fa5309c4790a1c4b612d2b0d3b87553. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/RSA221991464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072dfe5ed540d3271256213f791a857f32235cf7b4a067e5773a55e65a4a7a3f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/RSA131701302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef780ba22ccb859df635004aa80a90ea49e401fc7f14cf9e745500e760decee9. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/RSA131701305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abd0e00ea71eb7d4ea26c8cf38ee8a9b00a0aa1e2be36f5392ac8a02e03e29a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/RSA221701203.