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 0x7c60e99c1dfb3a9ef05119b06d5ba6d6bbc82b2b543e1953c639a0ce5a740439. 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/2653eccc-efa1-446d-a765-2545f39f527a.json and https://artists.proofprofile.net/proofs/artist/2653eccc-efa1-446d-a765-2545f39f527a.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 0x8a551d4da051a0200847d9e021225851b72d522acf51625654afd52d42cd6d3d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:29:56Z), 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/QZTAZ2385636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b656abcd2254ab96a87835e9654ce14eeed0fc14ce43feec15907f4e6ba77ee. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:39Z), 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/QZNWX2364106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdbb5705385276e935499131481430c185cab10796f99f5f33007e9f3e362f6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:21:22Z), 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/QZTB32390659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0820c6feb7c36093efc9b8775ea1c1efa0c717a2133cde4bb7248517ac28036. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:22:04Z), 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/QZTB32390661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890d79aff8a630ee88d9dac72a50ea083bdaab31f2a3b4d35ba10595e3e23631. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6Q2346623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d9ea3be09f356b9828b52abcf17be222b96363d965a391d1d83e156100c8ce. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USLD91758312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b7753f87c66db96ba3491565789848e365c3b689824de2cca4fe73e313647c. 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/USLD91762002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91ac218067c0154b0c831730ab312cbfa7d168a1c6ccd31fca2b820233473ae. 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/QZPEW2582503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a3439abbdae1131cf2a8b866053ca32691bceca7f465ea0bb191b0a9ab3e80. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES92520493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8999d8d342900727f432fd119c1e5c6c57ed47824607fe0dac8eca59d8eb61. 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/QZPEW2588579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8aad59d6b191b336a4bfb2c6e6d69d3cfc36c3c2539b0bac2b05bd7150d8e9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPEW2593548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d97fb3f8bdde0dcb4479a82deb0e815b41f0050897c3f89e3a4fc24a90a0ded. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT2VB2516083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91ac218067c0154b0c831730ab312cbfa7d168a1c6ccd31fca2b820233473ae. 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/QZPEW2582503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a3439abbdae1131cf2a8b866053ca32691bceca7f465ea0bb191b0a9ab3e80. 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/QZES92520493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57a6865306e8ba5816006136e81096fa367d66bd73d4bb7b297edc36487415d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZVEM2528415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7205a121aaaa267e48da81353b4c8c512117911d9ac7f87a2252bb82c97b4c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZVEM2528416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc605fc25c1238f4afbf945d78c8edd9f4d9e6194bc63abddc0a4a498234627c9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZVEM2528418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d2fbbb7b063c722e7fac8839abb46934bfb688ab4a67854e736080f257f079. 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/QZVEM2528421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228cfe2e6ce3a10437b03c144797d947d4c23ef0bd220b720a6ae438bd223985. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT4K52551368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcee332f3d77dc3f550e00d55f73afc2f542bde8e0ddb1adff46b4766cf496e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT4K42556415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3ee1ea8856a22610425140db265c3a1108f933e6b3871e043163515971280e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:34Z), 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/QT4K42558588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc80c844ec33f4a80a8da15220690e43192fa7fa57ecd5d44958fff1176cee5. 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/QT2VB2416938.