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 0xff1c10dd91a8b093b2b6d91db7c40f79785bc8baf8b758c51c23d440c7903207. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f38ff0c-eb98-46e9-848a-03eb39b485f9.json and https://artists.proofprofile.net/proofs/artist/7f38ff0c-eb98-46e9-848a-03eb39b485f9.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 0x7a14ceb3ad7b694cf4c5149d041c6eff943c5ec640770711e6e34c26aefd5dbb. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZ5AB1963676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f01e87eb45df9967a58bb5b067a293f3563441389092ba174d967edf36269e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTPX2150856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df52798b0c4a6914e67d6300c48435d3bc5893462cfd8eed82ead1a3bd364dc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXA1D2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d0bd32ba64d2e9b64733a7e2547f4edbb39604aa4f3b7fa892b5383f1a4026. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:36:43Z), 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/BCVTG2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9549ddf986962869a61eb5c6df067abe613b5a3e3c82adf89068b8cf513f73. 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/BCVTG2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b6421a2e645e0ac4d8ff1bd320ac1703af5f0d1a7bb3897614b1cce0d64683. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BCVTG2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6c6e603496a1f15c4439fd01084e0abe0c8fc66e752d99c1dd559b4666894f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BKRHZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9619faaf0f8de5bc643c228540f7e7c393150f9de965f623a5f923a834261042. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:50:57Z), 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/BKRHZ2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aaf58510857cda2a4a05e772e73fa0ce8d4ff13ea1fd5285a03ebe59c30059. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:45Z), 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/BKRHZ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed3f3ba99db73fe6ed13a3625a02fab52b6ca24967c503955eef7d34041af47. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:26:16Z), 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/BKRHZ2400007.