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 0x4439ec11278483512fc7bf43ccb0d2d44abcd1ca1d9d297ec6120a2a6371a331. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2215f11-06b0-4e3b-ac02-6ba891579606.json and https://artists.proofprofile.net/proofs/artist/c2215f11-06b0-4e3b-ac02-6ba891579606.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 0xcb03c87bb46489bd5ae941e2fb9669b64424c4e9dd3c1872011cb7c0263ba035. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FIGAE1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb403779b242c3cdfc6a858bcbb580ee9a4ec4d848e98d63ff07ba2a97a2998. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FIGAE1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ea8e1c8bab3569b03cad96d5ce98891e3558a13d1116f068fa7290fb8c7caa. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:17:34Z), 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/FI2AA1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b44cb4a87112d37c1ebcd5cc3505636a84014c951bc9bda2014bee99a96d24. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:00:48Z), 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/FR10S1866419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcdfecf61c09ed9c5e9312235dd46f8ea0d3230e1f4e05b3310e9001ac0f287. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:32:24Z), 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/FR2X41833425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2987109caa890b8cbc84dd1afcd148cdc1af4ffd7a2ccb465a523e4c7dd980e2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FI7S52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6475f9685b7a73bd14a4eef389a6eda593cb2233d1fc3e583b71344c98d41d77. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FI7S52200006.