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 0xf6ca28b60adec152392266b9ef3aaf5ad7b0b22e7cd7ba0543d7c2a7919be81b. 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/51a54676-cc1c-405a-a66a-007af843a82d.json and https://artists.proofprofile.net/proofs/artist/51a54676-cc1c-405a-a66a-007af843a82d.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 0x5e2a3c0ca189cdb97410ec4a19e6b10805c9c3ebf4971872dd993fa769f7cc5d. 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/DEU601606432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab262d4d3e6fed17cbe746f2ec0e115caf2cc05cb6df4b697d24c4189fb6198. 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/DEU601606431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d812719a445aa7d912c4f38737b595c66dd485b0908e4cd7dafaba7bc3c511. 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/DEU601606433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c631523c4600eca0ae34100f17ccba16e09aab4ed8ffeb58773e908be7107b2. 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/DEU601606434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aea676cde609e0db3196e5210deebe2035661f1e4f3850313b2542be990aeb9. 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/DEU601707370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e98ad1fd88d6fb98ce594745641a467f1e69ed60ee0c3a3256dd25d64124ba. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/DEU601707373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee996334ce42110abe8fcedf73c91e022045359f7ff31f69915bb3cfde71d2f. 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/DEU601908548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf22b28275967ca4de67170bd7f4069ebd777d82d0c5896c535dd782819be35f. 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/DEU601908550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b0c64f07468ce1eebf4168999d1bcba861ceffab97a50c9797a128ba005812. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/DEU601908551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad06dab272107c9b590ef38c4689cd0283d14ec642861cb88312d14bf91ec31. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DEU601908552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bd9e25fa1376aff26e5e83865a95c7f92c2ef11caedaa199134fb848ac6b07. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DER372440403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3e14fb31035af8e43a653e6f429400f3f62d6a0ea79ff82ab269721d330446. 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/DER372440402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bc8c286577fb0342e12697da1f040d2418237e2e3d582747820c9c49027277. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DER372440401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b7680a914fca6bb6da22265dcfbf92d4a0d864d112ccfd522197a9299cbfb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DER372440404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a02c27bcad7da79ea95b7014554b2083ec7c3766a13b5402d7cf2113ecefdd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DER372440405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61e1ceba02d092646cdddc63f70a5f82d87c18872d2aa40b8bdb61449e90b32. 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/DER372440406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f029a41276684d1d64955e055320cab39157f6228713b8a42c391f621cbbb1a. 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/DER372440407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1701804faf1e56b96d98ba81a68afbaec5b85fa01d2830d33a55f334735f79ff. 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/DER372440409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7036fe939c211e0fb98c71b90e1a91ce1da0778ca8b01dde6eb845fda9f6f83. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DER372440410.