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 0x6810375073d523f8325932c7523d4a34c3da40f89ec3c387363a2325cc559a95. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3492d3a4-306e-481b-ac6b-10ff08e451c1.json and https://artists.proofprofile.net/proofs/artist/3492d3a4-306e-481b-ac6b-10ff08e451c1.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 0xbfcfc09a528e535cf628d41f3a63e62b372b3f49c6762b812c397caaa584cd2b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:44:54Z), 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/QZNWR2114270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffbd91886ae272c3b10a7ffe44d6f2fa630dfc08dc0ef4f6a2a581a1ceb7273. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:23:16Z), 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/TCAHK2357863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c90a52ccfff2b53b52e4f571048aa28f25b39e1b26fcf778472285081fb3b1. 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/TCAHL2314371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cf52d793c8a456621a6c7abf44ff349af67d7d1c3150920a785cda37746bb5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:52:58Z), 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/TCAHW2487765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1c4bfec6b5b24890300d129ed0dd4a412ca7fd0ae4f6361445aabd7b0cfb9c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJG2599037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d570b173e8ee73030aa15f3461877d9445294bd63c3185cac37211f482c5fd4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:44Z), 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/TCAJJ2512768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9e9b09637c14dc58754a6db2a36478a04c782328d280e1be48759150595ee0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:53:57Z), 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/TCAJJ2582870.