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 0x29c8b41ca29859db42bb4086fd859b01263494f46a0430691d53320fe46a49d1. 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/66dcd6b4-c24e-4104-bbd4-eb9b4849a03f.json and https://artists.proofprofile.net/proofs/artist/66dcd6b4-c24e-4104-bbd4-eb9b4849a03f.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 0xf1bed63f0d77429bb186b7c3e66fab21afbe28acd67167a06d9732a77927cbc9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/BCEL32000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef6f18f39a21ea9dc3f8ec438d669a0f19cb144b13c71304b97d024c340c652. 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/BCEL32000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd3d6beacef10c343f84beffcf9938521836a953a5449d067b7c074241eaced. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BCEL32000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d7827e8d77a4fadbdaeef81eccf267f30081b20f5f27f5058c7eb69c61b6d1. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T10:58:48Z), 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/BCEL32000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88572341f061866f170ae616305d4c008d876896767098f1ec50a84d5c1f99a7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:30:32Z), 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/BCEL32000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b9197476e1735e335887d6ee9777a1bee31f510a6512476d461f5565f2c2a0. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/BCEL32000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb97497f921680f65864893ece0886a6099ada3d2dcdb8cfcd3042b80e1d9fb9. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/BCEL32000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cf97e5f3eebcdfad1adcd922ea74e679216f95a94e588c75913f19f70bd282. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/BCEL32100013.