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 0x87a8819bbf6c8dfa22265028ff56a5dffded5785cd9fcb56b4e2fccfd21c60fa. 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/23987ee4-c7d0-4400-9b3f-eeec26d4c8d3.json and https://artists.proofprofile.net/proofs/artist/23987ee4-c7d0-4400-9b3f-eeec26d4c8d3.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 0x7bde8658f4a4e09e9d3ad4f88f189a685c385bb2422330aac194dae4fbc3207b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7N2419368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aa1589c4f9abdc015ae70405ee49e54b9267314dfec6b06b16497557961c68. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ7N2419369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246fc0c01f94c2772f702caa4f4973cf505d84250909021bc0722ca90b226755. 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/QZZ7N2419371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2628dde2acb539f56cec7a082b035a50d4c95e215266c7f0f6f37a8a2c588c9a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6M2526698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cf54761edaf6667d61b9ef3e4837c33bffd05a16014e3f0c432c5d63548c24. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZK6M2526699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf426c4ad1ec7f598119f1d0b98b6fcf8e99688fbece132d748a7d458dcf1e3ac. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6M2526701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dee9136228e71c91312a04319819b04acceeace10bcff3a43f643d8df502b8. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZK6M2526703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b392cc93efd7120060adcd828d9dc86cdc817cbac096257094b033a777fd00f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6M2526704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca65f46cad960f3ce7c933c7490a2a3dcdf86a383996b10244fb5b50bad7c3ed. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:36Z), 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/QZTB92513131.