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 0x8e196de0c9b3aad561f97321a954c8cdcc8912ccd42408454cae9cc167d9539b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ecdfafa-5475-4dd6-b178-f52988ac0ae2.json and https://artists.proofprofile.net/proofs/artist/0ecdfafa-5475-4dd6-b178-f52988ac0ae2.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 0xc4ffd6215d5721b712957e98918b99a6a6446164288162061bcb58d9f9e79a76. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:25:09Z), 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/QMDA72230276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740d945ef271310a74feb9487f13b095d3ed67f5d4002eb0fd9d2dca7e6a83a8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:14Z), 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/QM4TW2458729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349dcfc2e38816d02bc6687141b5a9cab7f1afc7ff7d7c8b0e76b3eebe52f47d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:05:19Z), 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/QM7282436621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d7c06fc0df595502c19110438005e5acd7cffb176912e153b7f72d96b3a372. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:49:47Z), 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/QMDA72434387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0de07868c03c0ef6fbb6e844d9648583330df63081640c4cbec32e6f622523. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QMFMF2522144.