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 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 0xa363ac3c83528bb2cd59ca3e534d52f33de0c34d4602a676eaae0a87c6ad9c78. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50f1c025-ae62-4d9c-8419-4494225ba41b.json and https://artists.proofprofile.net/proofs/artist/50f1c025-ae62-4d9c-8419-4494225ba41b.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 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 0x9acb3f2f17dda624f1aa3a0a25063d3ca1639acfac911d09f822f3d8bdf94a4b. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZZ772430565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227ef1a2dac233a338618218911e704d7d888dba9fbabbc6961cce728f1a0172. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZZ772430566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7aea83300b3cadf941bc4c07f7f467461f8768879ebc429b596a345efb38df. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZZ772430567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143dc3067b35713d13a262e229f9c78e94ccc30dd0518bca048b2055e172dcce. 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/QZZ772430568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec7550c33b2016bcd45630fb1aca24bbaf045147c2a19935dc50c76cd6ff6d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZZ772430569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d9ded7bb1949ae1a9ff024fb7bbed56fc46cdabeffb6c91950efdc2bf59082. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZZ772430570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36f2d6bfeb8173dd9874a255dc3aac708d5f537c3cc517793808f7dc33625ec. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZZ772430571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d98f60efd3a906bdfe0d892a5a267192a0d38e228d97919db2fee978a3f0ecc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ772430572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ffe83e130328f991dfcb19b32c62f63b6fbac6d248a5cb8eeaf6ef9c06cffb. 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/QZZ772430573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdd0c01de9921b5eb44aed924e8a5da99283763e6f2a446dc9ade3c11e12f3c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZZ772430574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113747928832eb01ff30377638a3d5d83c8caa3740495b4998136dc22f9008cc. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZZ772430575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c533bb671c1d7f3d5323bebcff020ab976826a61e54f174b07786d7827fd9d. 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/QZZ772430576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05509e0ecee5b8c27f9988e8e0c762fbc964c67165a8dd0566728b57728bffb. 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/QZZ772430577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519bc5390b12cf014edc12f1843fd8c5f684d7a9513c4839635e78c52fcac9e2. 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/QZZ772430578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed30f597a507e7127e97884a333b9924cc401c79e4f172d30504408e7ccf78c4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZZ772430579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c124009a011e72fb62dc3e5bbd5938ef450f96e7d6348778392739ed7bb0172. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZZ772430580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cc0ceb96aedadcdb8799edb7e1f2aa68c615540f1c17d2a8202f66e78bd7c9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ772430581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bba6336498c1099e4788b74322454089202de184d4823ad260bcae539d8edb. 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/QZZ772430582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e4b2573d0a93c0515ffcc1716e9379235320d467b6009279a84fc8b4721830. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZZ772430583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796443e01dc1f5f3f808ec27019466cd943402a70cddf972b308317504e50a32. 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/QZZ772430584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1a4ec58480687445c6c40792c2caca6cc7d2c68fa39ccbfaa09ee9cabb8476. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZZ772430585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c8385b322ee7d7550b335f19e7fcc792d6fa3907775cf2fa822f504d91a9bc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ772430586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d40f18257961291fad2df81d3a6d702a95b8ad19d5dba2ca0b753aa35567ae. 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/QZZ772430587.