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 0xa1b30b186a31965ece022ce5096cbc1bdbbbaa95d41c105470f5808bd3726a6d. 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/3d1731b8-586e-403f-82e4-5885ea0b1255.json and https://artists.proofprofile.net/proofs/artist/3d1731b8-586e-403f-82e4-5885ea0b1255.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 0x679e29baa68f8848805c400aa68ff31e195cbb8ae4259248bace4ed530c135ce. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USCGH1609515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cafd3b257e8c1164f9e79b656533f36597ce0e8b5e2977be485845e587a6eef. 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/USCGH1609516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4855f6aa40f4bc2ee4a91a0036874b1ce9ddb4e387822fe2b55084b5e3cfa9db. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USCGH1609517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2167a091767bd24daeafa5c952a2df7476372240145a9aab7144f698c3e68bd5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USCGH1609518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26526d81abf00c75fbc1e3a2bd00d0ecef7687c738119c8fbd426fe428f20a46. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USCGH1609519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83825af74a7549107e017430cc0ef4843784123f6c28a134ff79dfbf21902804. 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/USCGH1609520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e353927218549be715ee72ecb3de7f16ed3208df55d08e67819e722ca7853. 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/USCGH1609521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9179a40506386bc90e16b7893bf7f1525f69bd8d8a5d1505ba0c8fea62be833a. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/USCGH1609522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf430f03b4f308fc9b3d5bd3a9a7bae8744dc37d85d0a64edc260750874256bb. 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/USCGH1609523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c407be2c473a6e5b5e22a4d26cf85a890ffd4b150457c816f9497534416240d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH1609525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88486367752343a45084c53d77d040109d0764b0800597c3979a712f021a4e6b. 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/USCGH1609526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b3cccca0b49e78f3243dafb848ba384ea6d18ca2a2a6a28b20f1e1dde4b4f8. 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/USCGH1609527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9084bee2d6272f1b00db6d645816fdd299150771c54ea7202b92f9e83a79c3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USCGH1609528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54411559ed87ecefc55785814ccf3453cd0d1e6e6d4928d17266498718508a58. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USCGH1609529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5156712a17f29cd16832ccd0ced292338b8fef0ad6a48da48a57ea034eabb70d. 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/USCGH1609531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78168ed485527c98a93c6acf6e428283dbb03e4bd0499b7da6be4e04da2aa0f. 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/USCGH1609532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73be4092f71bcbe2aca5bd3db488a823675984a9788dc235acb9ea57a63ff3cc. 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/USCGH1609533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326a517112950b1c9e0437c01326ebc6b52353820b5051b78ed84d772087a9a3. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QMEZE1822031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d9f2b0b1c3e197a255265769db19b35c3b2eb5bc2366de129113b4620afba0. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QMEZE1871809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fabafc188312c5cc2c2ebcd4e8700cc66208e96a373df285cca0f6d33f028d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USCGJ2433253.