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 0xd131e434d63d8be9b258358f6ca4d6f0f7728454f4f6cb88a1673dda7aef61fa. 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/9ddd2145-aebc-4452-b71d-2be6416b033c.json and https://artists.proofprofile.net/proofs/artist/9ddd2145-aebc-4452-b71d-2be6416b033c.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 0x3419128c4c2c646b71f22df4d038927ca1ba228bbdd46b4ae5a4e1c91f71955c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DGA0M2317433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b07d92e4e28112c9f04184f197d854478c1b7614497b95c542123156ff60943. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA2W2447614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434c34580c878a9adcb53299e4fa4531e1c1936d6d9d74ba50dd33a93c9de51b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AEA2W2447616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2a279edf1510809a6ae9644e08f64823e96c59f405299918f014146ccbb22e. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/AEA2W2447617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996bf70a0940b7386fe71891dc6e551a4559b8432563a69f8acecfd81e049567. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AEA2W2447621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0176438a467772fed9bcc8171d0409c8b52dfb8d8f3d0b087f7251bf68595822. 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/AEA2W2131691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe843c6fa02b5fe2ad1530e4157f9f6beff1b34691031b4f98c7fd9885b8709a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:30Z), 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/AEA2W2580865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d475caeeb2ca57d7a728f1613c865b773f17579b2f4184275c2a834314dae2c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA2W2582766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f87e794c89fd70f94905f8f9bbec34d2ced5463b0eca3b30e952dff16b7fe6c. 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/AEA2M2506928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625c1012d1f22140e8ef9fac6f6b85b052dbbf8a06ba1632ddc57e2a7ab39f59. 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/AEA2M2536765.