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 0x58285a4ae2941e8ecef86ffae6af94368db60cceb2085395d339d02ab5183bee. 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/d1711c96-d050-4ca3-b01c-975e22c493bc.json and https://artists.proofprofile.net/proofs/artist/d1711c96-d050-4ca3-b01c-975e22c493bc.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 0x2aba72d2f50eaade923be5b2ea553203ee511cc9e3889ec4f24bc6b7c92a6aa9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES5021500672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93663b1dbe1d867e8cc237b765967b512d014d6cd377a6e1abc592f6a4a5079e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAEX2057549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2b74485a99bcd8dd9a8a02b1c9dd7480dbc9177587c1f7cddf83a5a777e92a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAFA2017711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3b2c35d7992b54ab9972fa1b899833d62fb780eb273fb3dcb0d7854400cb4b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAFA2017847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104ef4c2d6a9d621f1e38c9513cf8fc31054ed92c258639b8427018a1e850c06. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFA2017864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d63cd2dc631690f64f73f5d99825a799df18d68f825436ef6030a9bfb589b34. 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/TCAFA2017886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816425547e977930efa3499d47a76a153f8406d44c34ff8b49242c9f44bfb9ed. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:44Z), 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/TCAFA2019857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa019119f4aaf96dd3904b0348ca62d5206512da2e4fffe2de05d74b181dec2f1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFA2019883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd4ee5a34b2c6439212f4df3aa39e6761eb2f7c292ceca81e732848b568a462. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/TCAFA2019900.