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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cf5f51b5011ee8f8b4a49cdb45a7abb245defac0d392bedcef12f0fc09c15e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3a71d34-e357-4af2-a850-574e5f99891e.json and https://artists.proofprofile.net/proofs/artist/c3a71d34-e357-4af2-a850-574e5f99891e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211057e78e53fe1d48486b28a86a0f4a8db32db8f7870657c8c7d52a3bfd64ea. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:02:26Z), 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/USDY41832455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a7194ad23ca38115b235e561f95d034ea40b03a7868c665b7f91714e547e45. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USDY41832456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f598cfbd8272b88db0f3936bddfc0de0610dd5b6a7c70b3417d6e10a963040. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USDY41832462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7562d7e6ec76178fa54cf683d069f998cfb7f2d5c08699c46ea079efb61c731c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZ4JJ1839670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a701cc62eea3c2cb490f9883ac66d5d36020db439621561904d0f5771d0bd0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:33:31Z), 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/QZ4JJ1839671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a5388ca16c2f26325d20e72d04a1b147055b36c55ed122569e327e19b4d446. 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/QZFZ22060384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c8a45eb461e3eec030fd2dfd8313e49aa15c305e1d9d8229015a9ac656da8c. 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/QZES92026915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045f953713396b9ed2ba3f13c46e7de4ac40de02e051d8cebe8435cb433f8d55. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES92026916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c62e387677033808c1c221313264153d29cdf7162482942ef95a7c629ce5bf. 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/QZES92026917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a0cd49223fa229e07018bc81b68aaba6b8372a09f198640b2a5b4878a0f24e. 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/QZES92026918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d588e434f83305d03a34bf1e42c35286c601f635da75c4dcb9e5aa0178e780c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES92026919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe52a400aae71784507196a63db06732e95f7ba747044ab3d9f22c157d2e379. 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/QZES92026920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf6b7811021f73ee7864ebc2a46ee5b3a0561d1b0f6c2a699cf500bd836866a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES92026921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d99c74014cfaea9f1d96b035b06fdd986c9dad460665d5daff4dd9986aa4601. 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/QZW9K2265355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b95f454cb1e0e918b8255656a6ced65be4fb4df1022fb44b1de1aac01ec099. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTB62543151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5280a4f632265756b30833fcb936c8d3b0a4af77e0f077e8fc4c0bcda8cbf557. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BK4DA2215137.