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 0xbe69f865321b3afb66758ae891971320352987c4fe6a6f244d7bc51a4a1fd4cd. 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/be0ac4bd-b4da-4903-b7db-ef2494decaff.json and https://artists.proofprofile.net/proofs/artist/be0ac4bd-b4da-4903-b7db-ef2494decaff.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 0x5b8e6074faf9fc4cc6fd8989bec9653f971e40258625dcdbfab2e9ce4c443617. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTAS2451169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17a688c1f90159df333d45e6c68b054ea9504a4c65fbf0fa30c658337e49d76. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAT2473843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112f4ff0165ca399e69573417bac5ed52a3c84a577bd5877bb97f31e1ba72017. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:05:48Z), 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/QZTAT2473845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4223d42ae45c2c1af49ba6f7fd732211ba44be3e61ea4748184600f03848ef. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAT2475970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bd5a42b39076e744e996c064fce6172d40fbc76d7f4ee2d5746fe51a749517. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:03Z), 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/QZTAU2428843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cbe7b74e9369807f195483dc4881360479e64f59c1434c33b832b545497831. 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/QZTB42414740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec819ddbc9fbe305543c5aadf3fb2eaffcc399297cd8aa1410b41606ffd574b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:59:49Z), 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/QZTBB2444570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0cbff16a3e43f8ccf0285ea4c6b7c51f325cbeb66cb3b59d8b81dbc9aefcb2. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZTBB2449353.