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 0x076cf0de0d2a5caf103d96ce79ed3205eca1ac607fdfe3e83d9875309e63cf95. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c258171b-af0e-48b9-b645-26ec588564e8.json and https://artists.proofprofile.net/proofs/artist/c258171b-af0e-48b9-b645-26ec588564e8.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 0x5a52da8c23b4d78953df5ae476dff3f8ab9d9dd2591511933da8635892a44ba9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ITXDW1700119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ee1c06715dba7fc31a3d909ba9e9bda0f458396b032ccdecaff2eb37010e65. 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/ITXDW1700884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3789bd3ed6a85c8d455cf80c95d0e5a62bd01d8fa1349838dee0c7b80be3d3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITXDW1700889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee0aaaad74d48d6876b316e023b7382765d861b9214a8ec6fd21b72df9c7757. 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/ITXDW1700890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c212e561818784f48204d0e498d3d7df5d27505c17e1fc09cd96594c7ccb29. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITXDW1800674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437fb7e82ed0c1e15197d85caf12a0367f5fd89d9aee1defeaba0b856cdaf705. 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/ITXDW1900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829726bc4c97061c7ca563add5aa1bca81c422bf5380ae393ae1aedddf0d0799. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ITXDW1900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b323485ffa640902a059137ff09fbd85d775bb74d81dc107b3b8a2d3b21ad1d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:17:55Z), 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/FRX872205145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946ba6022a26cca58ca5afec45cf1649e14dd267f48d172c00cddfb82303751f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DGA0H2335300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feefd683aa75eca13cbacf7624535fa99ef3e1479dcee27fc47314ec354ad36. 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/DGA082408319.