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 0x7e12ac61bec56c0130253b417f7c7a29de3cd852ddbed91d86e56abde00dafa7. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26f205c3-ad37-4612-888b-55f9529ac1b7.json and https://artists.proofprofile.net/proofs/artist/26f205c3-ad37-4612-888b-55f9529ac1b7.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 0xf12f11b37831df569f4788eb4c58502c58fe3a5ca9ac7714fb4ba4c74b903182. 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/TCABK1229727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0169885bd5a364ee4efd10c7f8c6f6e95e132e1cb1d61fcb87b1e1e1b370bc. 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/TCABK1229733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc323ec4ff9834698d27c2a1bca57d76ec4adf352cfc80f1a410d88d88acab5ce. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:10:55Z), 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/TCABK1229756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b412b636312e31ee8c4ba914868d453e84bfa1527f8d57f73d889076ded7464. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:31:41Z), 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/TCABK1229760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2803f00ca9dde62ba52359735bab460f884d9cd906c31562594ce838147950b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCABK1229763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e248a3d7ac47b6f8cf4631c28e85edc1dffdea718d182859e26567501bda63. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/USTCG1078573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc272b387c66d3ba77ce68e763e1f01f6cee48876289dcdc7be18e9bf7e47f5c3. 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/USTCG1078593.