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 0x9e20b10b33bf5a1baf8cbf963e40cb2c0a308e2e611a65c32f90320cfa5f6247. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d36c059d-713e-4176-9bda-d5841447a6f9.json and https://artists.proofprofile.net/proofs/artist/d36c059d-713e-4176-9bda-d5841447a6f9.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 0x66218013f489e7922217f9e10fcbbfe92ea1724e736bfe2a957f8a629e8c0749. 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/QT3F72562205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27d0dde43e00e5dbb6ed898384bb3f4ab711771a90efb48157e3590cc0f9957. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT3F92500793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767615aead6224ea37b747a2060cfe5b7c4d45fdc3b897fea5e314c44eab27fd. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QT3F92504151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044df8c0a2dcdd767156f63b1a0e749f60ea7509393f312693184361eded6330. 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/QT3F92504153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9e0514931e69985ff693e08cc5c8eeadf25f6c891f8c38ffddca444523f308. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QT3F92500882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c320ecb5b90ababf3616c1b2c298cd4b37d80b8982b1708099a0d656c25bce. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:51:41Z), 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/QT3FA2560016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f5394d743ffb4867941a8481f475fbd0f3bd6fc9012ba6d11bee048de16e4c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:46:19Z), 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/QT3FA2560015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce8bb385258c9aa4be30f6bae36f8da1c76122795073ebe9488683fe0feca79. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT3FA2560013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cd5f958c52f633a1f6a4ac2d3060b57e0460b90df246650b131f67989c1820. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QT3FA2560014.