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 0x26b4beb56d06e1d6b36f19178733be32eb0f2645b04c023073867dc23ce74132. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7c1508c-e80e-415a-b173-adcc843ca3c4.json and https://artists.proofprofile.net/proofs/artist/f7c1508c-e80e-415a-b173-adcc843ca3c4.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 0x7b709ebdc9d432054070fdd6f75927df70c4ddb594cc7ea6fd6de1f1bc4ea695. 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/AEA0Q2118432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd116eeb383c6a74a79cf19e52d4079c08e25f0bc09b8e4e6ed1af92eed5026. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/RUA1H1883864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb7749cef32801b5c359911eae3fbd042562f9f392c3d9bcb5da4b918cfa057. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/AEA0D2247468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa5bb75a2f3b92372f15d395983c79c00db25b97638db7053afd8ea3fe18500. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AEA0D2247469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c858823a3308c420b484dc87d6766e658d28508365bf9ad413f7151c8e5a083. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:42:05Z), 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/AEA0D2247470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc74672700a9d36239fa1da0adcced7dc7a4d5c0f78140e7883962a61d2c1b4a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AEA0D2247471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd944f95556a03e89e3cad59435975283b10f447f551e32bdaca40bc6e7b6f5d1. 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/AEA0D2247472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d982dc7c68e6d0db5123f28ebe1103de12da10d8723de37f98e0d2c2457db86. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:18:42Z), 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/AEA0D2247473.