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 0xd17711ba82842a59acdb793b5d3defee7479c790ac3c979107d612f94f5d034c. 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/b35d0213-7cac-4f63-9be7-abea16fc3424.json and https://artists.proofprofile.net/proofs/artist/b35d0213-7cac-4f63-9be7-abea16fc3424.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 0x3dd9e04636d9d97215f05055c034d658e31706bc42bceae1598c461226f2c377. 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/US43C1629682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8a491bafae74b4c08173aab45df4d01b22494227da1d4bc66f3b3e4a78351f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US43C1630332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827e90efbb6f28226f048569d18ea7d374c70e306f418cce42874f338daa5a23. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/US43C1631743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc6a7e9e39ed63ef85cab180dff087155e4a734694b962f642274da4d6bec60. 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/US43C1608482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab9eb6446c64b681f427da2bbe1fb486e0e4ccd19b29ae63b93e67633d374e7. 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/US43C1608498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8cd584150d7a44eec8c8199bcf14cac30e8e7d99845d9b9d33bb19a7eb7377. 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/US43C1608492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b94d8fce717dfe7ce84defe5c602f46cd9f9144e279d41e9d06df12f8712c8. 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/US43C1608487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67134c71a70e4e140ba549394a7886f7727b9a9261ded33d45977181327ccd0. 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/USQY51767893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28126b16e3b0edd123219959528912d9c4d03cbf412751aa83f5e5a71c43fbe9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/US43C1608484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1864125f219c2ce9b26d9724772ed1fde00869810fd09b3cbe5796b986d8c0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US43C1608495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adfcc019fd726fb74d58a8f6b14d194c9807593b82f4f4afd9c364242bc40a4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USA2P2460515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902d43de9869dcce1913958b73e7c39ea6f2c93db427c26ccf781e6556a35593. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US43C1630595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82180b1a3aaed76323b988a90152853909aa93461ec08fdec533171a9e7bf08. 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/US43C1625631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8bed6471f72d0502d3370003b063e64f916bf3ec6205a1508d68ee74ab5760. 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/US43C1625637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c91b44905ab8124006ac3f7fccf25892fd564bb3403833932906011c5a054c. 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/US43C1625634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9303e6adc8e7293a5e0b9749540eca993c7180deb6cf2f31dd7ec1bc4e228dfc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US43C1621496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bf86da3608d9adcc44dacf2b6fcd897a3f341752739523e31bd318f061a638. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/US43C1615599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13764b7bbb059f9c8e0bc1ad55e3d41bd6b5d490d07b15ebc1383b23fec4b828. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US43C1615608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34e55076c2ef6f95e75f52722ef17475f76c15dd476ac37267030f4e594a0eb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US43C1615611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280b7d8f7bb23141ab2cb9be5d2aaa9e82d6ccb76c6344767daebdc18f4230ae. 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/US43C1615602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e62723358eb59cbea07ff0cf4e54721f2b40c44f44233ac4264500d3a64dfe. 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/US43C1615605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c788818fd7837681c86595b0bdb3b80907801c544338916a02921fca3c5ef9. 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/US43C1613902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60ad5dba78456e3e325ab8592747c5bc6d780643fca772329c779d3ea4b0600. 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/US43C1613900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa880841bb9adc1c5eb823f4b77cd4fd0c1c8d8626c9a3dfcddfafc89717906. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US43C1613894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6f52e79ebde0fcd580dda8d44c62b77c868eff129e2661191ca596fe1a079d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US43C1613897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa082d706a35e85a6ba49e3818c6f7c7ee5a5e4ed9c8be42c7e3af02c8c53f324. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US43C1613905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720065d484dd52a2248e380ebc129fdfa7204250e3a8f76fd0b80826e8e4c97f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US43C1609701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82e8b7b20286d87412a3152fdbdbe1e15b677c2e3dc2f9f0bccb6f33b46c7ba. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/US43C1609707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d2d7f5e1543e8878a0acb1885f2146145db85fa9d2816ecb158499fa36a17c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US43C1609704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21e6c65d1f5550f0273a44fb24d0c7367d96d63def33fb644e820ae6a20ef86. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US43C1609698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869e7407af5432cd0aed08a98d1cc85334ec9a3318e7290e6b39de77d78b3176. 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/US43C1609709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b65745981b9c0daf14a5f07391933c285f9732046476f3da5c7f1d7a8465bef. 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/TCACN1684505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02df24e8f1eb1e4d3985769b474187ed65604c531bf6e95befd5a4d0b8f14576. 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/TCACN1684506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd972c917b4f140fbaa4b9c82519c35cbc3b1ea204f9c46674854f5fe1f9e8f9e. 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/TCACN1684511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47ec44e325d58ff2144ab7fbb31391d0872e130463e844ec14f4181bdf7be13. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCACN1684512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd3d953615b765828bf6243ff7a16a9751ac060c094b4ead83570ecf819682e. 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/TCACN1684513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67134c71a70e4e140ba549394a7886f7727b9a9261ded33d45977181327ccd0. 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/USQY51767893.