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 0x2f03c6c5ad62497426ce1e684e79e3748de4bd95bbc6f2bedb22b261b0cca5c5. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/285c7281-2cb3-4769-b668-a528148b3ace.json and https://artists.proofprofile.net/proofs/artist/285c7281-2cb3-4769-b668-a528148b3ace.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 0xca5ee42bc05ebe01cbe1b7a0a9dd69d357316ed7277d7837a5af18e06cb884b2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN32027023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315f9cb2f34ee91fa509bde954212dac8ccb7149cf7c83da726216b9e4b3955c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYY2122732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4a46c68d01c239f630bb169c19858f455d4a75b55720e0d60fb88efdbea5e1. 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/QZFZ52174711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786960e2eb9b9c31e23fa7be756ed37acc56517a39b1b4535becb4a7ad07f4b2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEQ2190050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa75ba56e0889eed675d5064571de474760cd564946ca94498d1c35d7ddeae2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA62361559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf176a806966ba7c648b6c5af87bd6d06ad998dbd04f3690d12ff560b43d7fc70. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6L2392309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11ed0b4529abdb5c2963778d5f559c37bb8d42eab661e5a08c15163b03e8a6f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEQ2317683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6946b72b33ee37871fc9ade600eb4eed785b4641b7be122df53bf0156eaee109. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWS2396501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632618ad561a40dbc7ecedd6acdd3df4bedc633e5a551f076f6038cb6ffee577. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTBD2337491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59110d8074b31fcf851ce5d79fc3f692db82d6133ed6a3d5ac90a7d0325343fc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWFE2392105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3240ede4640becc5a1cdc023d802c9037889a8be23f0b9f606c221734d3618ca. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZK6K2476878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e397050ff80f3f9782246b5799c45976fb255d3ffa03eb2396c18a1becdc3e. 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/QZNWU2469018.