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 0xa2b791d5aa69f558c5696532ad1997dbaf28edf3f341bd456e6af159f8e17ac5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c29e8745-5e1f-4136-9842-4bf2b8e7680c.json and https://artists.proofprofile.net/proofs/artist/c29e8745-5e1f-4136-9842-4bf2b8e7680c.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 0xb5dff4afc05b0a8de14a634f6919d326f27a9111323a63a18246020f5184a558. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:40:24Z), 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/FR59R2306783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0498aa3f260ff68d84508431926b56b019016c0a9a87fd4cb5350ba85d6cc7b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:53Z), 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/FR59R2306799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75d5a4dadef4d457bc95198988d2ac6e850c4eab529b87406991d1a6b05b087. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA072200576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3f47ed217f7a019823b508149a38df12e9025123b426171416dea9d52ae66e. 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/DGA072200577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b86357aa5acf5394b2e6c66f4f2dcf5a0f4024d12a2a2b10f2c222acde96f76. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRX452356831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e1ac16a8072c7b928e27032b1a0925a3efec377b8ac784aec1475b069ed731. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:57:24Z), 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/FRX202368074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ecc0b0f5edfea6c7ddef83cb8511ff464464a0173531b1912d01fc7038fa64. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/LBA081104530.