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 0x7f32ad927ac085fa5a2a2b0b38427a24048d584fb5578a70f4c9e6641b61be44. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73d233ed-d3ce-450b-a352-1fca8447a222.json and https://artists.proofprofile.net/proofs/artist/73d233ed-d3ce-450b-a352-1fca8447a222.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 0xbac2472cee5d4e362002576de0012ff0bce64e6389b770b9b86fab204cb080c3. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:59:46Z), 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/QZES52522062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c1554dace1cd9cf856dfc301f3520ac49743edd491b554b8ab8f6088169837. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZES52522063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bddd0588eb6ba5b3ca673e1df69b500c92833cf81b9324429c66d0030ff02c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:49:18Z), 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/QZES52522064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26091745c815cbc7e4fb3eba24258b5ff29c7663b837f1944c6777f28f908b66. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZES52522065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53105d64be09416440f878309ef9b8f45b92e720a623f619337fa699d216ab61. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZES52522066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4984ac5255b66cb693a9770705a3e73fa27895893879d7403346b59002768a4d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES52522067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc8af2f6fc7ab67671a40db06d25b6033e7eaf7f1d314f7a6866e780435b98b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES52522068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9d84bb44ed8d649dbf9a679882db74d5f6684f6bfe4b83bedb02bcf3277ae0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES52522069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a10c58ca40bb873d7e594a1e85a9a8ee5417bb4db3b0c5c67c41edd686bdc53. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZES52522070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a61c6722f63667417e50248d1c0b1476c4309d9c8555dba20aebf1fa2782f9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZES52522071.