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 0xaf0225ecc8a048deaf07eedbc23ba9138225252edb139f32fd66ed0a5ac413ba. 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/a490c4cb-9f50-4152-a394-6d4cbdb81e38.json and https://artists.proofprofile.net/proofs/artist/a490c4cb-9f50-4152-a394-6d4cbdb81e38.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 0xe9a6d9a7030efaa904344887833fb810946ff08aed52a93f595c2285b72a2533. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX201935033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b2c7c7b57df04c2ce9d237854047409cf5271920acd9cf387920e8fc639d55. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/RUA582105333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31a3a1e0125f626bfb759d726f49186a3e90c91d5d78a6eb4f07202a1429b1c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUA582100876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5833db72d371db37fdc4325eb09884279a3fa6ad38615dff8fc9a2229a2cebbe. 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/RUA582106285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aa661eba104f969aa5c842c79902cd531655890600aca5cbcf71d3b83ab1bf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA582101693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dcbb5e2099101ac1496f65cba5585955d8cc6c830067beaaf641922ef45b58. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/RUA582200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a956d577f5f7e7957ddf9e736f760cf005f5984ce99efb23bf1e3a6396a8ccd. 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/RUA582200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca23c3eb92582ce1a0ecbee3d8fb6796e14560993068c8b3a760234200052c0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA582106925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8838a5074fa1d46636733afa41636d8122b0d158e942e191d4e342ff2bddc429. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/RUA582200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d246491b41bb560043724537fc22a47288d7b7ade06a7cf4a9acd966709be8. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/RUA322201272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e2f9ba9eb1b1a202b9766d669b9f0ce923af23ffe5c3a12cd933d95a6aadd7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZ5AB2381384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5ba8156588eb37d017d168c47995c3c059b91cf011810e51280633c6982a63. 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/RUAGV2300482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd6e530960e7f2921f4e1863053bf667d8130bbdf9b2698e1b0056e3e3297ba. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUAGV2300485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ac88a855c55c11fa728e5b152a3e6926fd8061c9b987d6dccd1381dc109552. 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/RUA322205003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7578786beb8335a0a836ff156ad167644451331527d02ea5a783bdc4ab37b3a0. 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/RUAGV2300488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61bfd4b378217ec85b227ed4c1af433f06bb70a41236782863641c59f117f60. 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/RUAGV2401729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84aa00c010872d4da18952a9d3de90aacca2fd0b34c13f9645d8dbd22cc9237. 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/RUAGV2401730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c171fdedddd9240674f97ec42f03223129bc4b90031d22345c97208c7c61c7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/RUAGV2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f507d60ae123dc34e7bbb1cef1e0d0679239666c47ab44aeed82bfd32486995. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/RUAGV2303093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda306e54d737fd06ff1579a404c087bfb2800891c7095f8aa25805c928676655. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/RUAGV2401026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159ca05722471fbc2f9b311604b533f82aa6798513f657fc3d9120dd3f93d7d9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUAGT2456491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d832e1ce5a3f25752c7374b9af09d242c00fdf8c17bb868481d4ef3b8eb146. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/RUAGV2407945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d062a483f20160aae1be76c004893669ff93454c2829d29629d64613d992e2a. 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/RUAGV2511679.