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 0x74264c9bca0d90a05f1c624ef3f5c0165a5e4919c22c297b8357c0d6eadfdad7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a138d1ae-aaec-425e-8fb3-814090f77f21.json and https://artists.proofprofile.net/proofs/artist/a138d1ae-aaec-425e-8fb3-814090f77f21.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 0x62b3ebfa232536cc73492a1cee97897d2c97694a768409300984f6ae254fd6b7. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ZB2LI2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a0957f2cf157f7a98dad6b0bd9d76364e1dc2005bd4edaf270d18d839c2527. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/GX3Q92548898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f3545336560c48b403e268ee1a36112e43b625a490ca1dadd85cba60d7d503. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GX3Q92548899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24727b8e1133eb0fb3395b9e4610bf7ceb872311f95980dce9d9ccfc04e8f454. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX3Q92548909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bba3452a2d5f677ed18a21676b5b8e994b44b6146ab466683597bbce2a068c9. 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/GX3Q92548910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c0017bd1c9e852be65a337f63de05cc7a486a4ed02dbeb85ed066bba629a8c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX3Q92548907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dc4022b3f1a2cb1a52846b9a564f9537dc7bbe5befed1cfa607c147428e468. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX3Q92548900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff5888f5b7c1c9449c5d438fd11d2ae6bf0d4ef07f39fadcf0539808275da89. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX3Q92548905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea186a764a85224f6e79f6780596c792af9cb3a34bf817a17f97d216f0dc299b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GX3Q92548906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15925ef1c5cd2e1ee32aa9877832b563a4e413119fd73be3350c53e559f10634. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GX3Q92548904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f60e144da02b220fdd1475c9d96052a2c99d63657ac5ba0c2568ad114a2d21. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QMDA62598624.