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 0x2e60cf0dfaad5fc6f2c4fbe2dfa0a007a62f8860c8577995d3d7eeed49f3cb2e. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7daadaa-51db-480a-8e01-87d81698a110.json and https://artists.proofprofile.net/proofs/artist/e7daadaa-51db-480a-8e01-87d81698a110.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 0xeec21d9c78d9b315fd832309e29e5eb535f5de99ad340034224392f7f4d74eba. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:57:15Z), 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/BEA031700119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62ca32f30b6451b82f021c4d1dfd82722ea9ee885aea3b994a974a5211573b1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:23:05Z), 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/BEA031700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56103e2e4a954dbf7143dfaa1eff73acc7dce68fcbf83159938a3d668018aaf7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BEA031700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c23868d540960e3a56532fffc32ccb9883d92f7838e8bc6a0fec1eaee857cba. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/BEA031700123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2459db91dd3f39a7a52933a4d277c0930d747031bc62ad4ea2c92301519d911. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BEA031700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c7217ad152b983432a4781bbdc179b6b04011bd29c7a21a9b2c96749a44b03. 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/BEA031700126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dafd2cb2513ce58ac358377ba42c1aeaf092977493442bcf06b1b55d2af1fb. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:18:47Z), 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/BEA031700131.