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 0x9f175748deeba52d087dae1d6074a64354473a98f24941c6818106d025d4e5e9. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cb4a197-8a57-445f-b86b-eeb49910f91f.json and https://artists.proofprofile.net/proofs/artist/1cb4a197-8a57-445f-b86b-eeb49910f91f.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 0xde8e83d5b852336034ef177bb5f4b9f6d8d86dce502f4763fdaa1294c43a6bcd. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:08Z), 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/TCAGA2209659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fe445a0dab79757c7a4736274a983b537704626f02a198ae093fa68cbe5c46. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAGO2209696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c4349e195af52ce45194ecbdef165914ae5b662ea129f8c0cf2e13bd303c46. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAGO2209889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2503fb4e2213f2429c2dce1cf8444116cf49b46cb28691e41fbc2582605e16b9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGO2210005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7413e2ef094540e3cbc0a370e7ca9b00539c5ac5fb6452e69cdadbbe3546dc4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:24Z), 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/TCAGQ2203747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa619975dcf3c8d18a0198391864972d61cbf373f1f3726d7b33799f3e9a407. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAHA2347282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6540048a0e8a87eba1cdf096edeb8c0cd3dc79bf7c81392584f0c434a4e7ece6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:34:23Z), 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/TCAHJ2335526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc434ff65db54cb383b7b8f8c84d67f293d6c099b78ebb8fa32439e5c297f1c52. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:59:39Z), 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/TCAHS2354183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc4196d3aaa37f4f8118d3d8b96786e18838119e25705aca2bef09f758f2878. 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/TCAJT2500794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b20f7c96fc1d63fc03c995669ac32ca5745146ce4babb0c3648729b82769ab. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAJT2510988.