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 0x07eaf51e980b537402a593953bde586d2eeb0d53081f6515dd0371f562020315. 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/294f6eb4-cb44-4b4d-b94a-5d8937166ef0.json and https://artists.proofprofile.net/proofs/artist/294f6eb4-cb44-4b4d-b94a-5d8937166ef0.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 0xb061ba72684a5f851b8ea97262712be4184cd117ba3b6d0169b21602515e006c. 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/QZL5N2331955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70ba61fbfe9d49b0cdc1c4398ada9462a7cc717f57a50eab092058ec4723826. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZL5N2434609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc4500b23de765616718aa7fef27e6923f48577101bef19d424120fbec6cb44. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZL5N2434610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabeb0b746a7de4fd2e5b32eec03fe0eabdddde86b0e08c5e3d6ddde61de08c7. 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/QZL5N2445876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ac8fbf936a067b17a3a73078ccf806da2a6d55056af0b5e1a1c7cee5b01b80. 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/QZL5N2445054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cf678bef34c008290dc5167015e42069060368ece34b2b4a8837fddd836657. 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/QZL5N2446950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f8816c1fad96c9d30541d6e5a0ea84fa82112a9dabd5ce32c4f32611b64791. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZL5N2565991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fd5202132d4b4e652394a4da95d983e680bfc2b3ec377358ff0983d7deb562. 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/QZL5N2570688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240c01e7c74a2bd7ee1847929ebf1f05ad6495d8b030ce104106529a95d19f26. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/AEA3P2500577.