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 0xe6a86324bea8b1fa84637d743c34e9bc451f587bf06a58908c4965ca3895e8b8. 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/dccc1338-1b30-4448-80f3-5e70489dd290.json and https://artists.proofprofile.net/proofs/artist/dccc1338-1b30-4448-80f3-5e70489dd290.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 0xeeb3c3e0c858aa51235c0775dfea3ff575eddab30bd5157a55d1058842718128. 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/QZES61916541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd794b84707d9f37ddf367e46896b52d8ba39b38780d8f74404b102a80739bb89. 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/TCAEZ2029572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a40556f5fc6be481592f2e101e298b1991fad71d34ab355822db19cfb75e46. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:12:56Z), 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/USMH92328165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc323bcbe2680bb039c65491e2e437b5ffb30ed4f2c585a3338b64d4d8e6333b. 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/QMBZ92425019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fa3335111f6dae0096ec76c995fb9704f6e2cf7f9400e84dc25d767d424c27. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMDA72447771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc323bcbe2680bb039c65491e2e437b5ffb30ed4f2c585a3338b64d4d8e6333b. 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/QMBZ92425019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064807d2378b7c445d09328a9998075de583cc4307c6b43b2ca34e614e81333d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMDA72447784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd881bd93e60bdc18e0518bcec56e02b7333822b2379416130f89df87d9e2b90a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA72447786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750b620813fbdac4644ddb628c9142256644b03d2ecc768f07273c38dac04664. 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/QMDA72447788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7d0de29f719ca0451aa9dd708c498a8d86c68a5f177860d49049674bd8682d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QMDA72447789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de61b14c30e8d065985ce9d26ce85c83b53471142dc802b0ad024601bbe0180. 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/QMDA72526279.