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 0xd6cfdd7f006a25c9b03a4ae5845ccfc8463ad282458ffafd717e2f7bb7e2950a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ae6fc03-0dea-42b3-bba6-93960fb2fe65.json and https://artists.proofprofile.net/proofs/artist/9ae6fc03-0dea-42b3-bba6-93960fb2fe65.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 0x5ed8d2c1c1f119f2d68c69dc5c41514935c6e53e325e92f636346655cb813094. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:36Z), 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/PLD991920901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bbc5509d903aa52f95c0fff1543c9d64339176dae3d46376bf12f6a7f1b9da. 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/PLD991920910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011098f45ea44d7b756977aea37676750a457a62a3acec7597a2b89420bc529a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLZ262000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0433cb420d9a4acecbecf1beaae1058e4bdc3f6a7aed7cd91f64d7152e648c6. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/PLZ262000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6663033ae0ce59c3809b2117e60c0eb0c9c8b2f3704336b5456f2e48382722. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:52:42Z), 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/PLI364178020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad517a491f53150671e7170c9fb6f4f64bb992f07b8b5e63aeb9ad6b83aa927. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLZ262100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a0e96734f9e317fcbcc2a3368549b010a82c1b34d0b9b745e1c10fcce89c15. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:46Z), 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/PLZ262100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737d2ac6304e559a7d6067a685b49f6041d7d763b123c6f01ca4635400e901f7. 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/PLZ262100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bfe571b6c34a57464d13da59399b01543094214dc7e518592e34d4f561c6e1. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:03:27Z), 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/PLZ262100007.
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