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 0x36b679f4dea1b334adf45f578be32db2c949902423aa48ba43f39d8d573938ab. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/674d4226-c646-42e6-9666-af8762862b2d.json and https://artists.proofprofile.net/proofs/artist/674d4226-c646-42e6-9666-af8762862b2d.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 0xf95ee6f51759f7f91956deec642bb64f73c89c9c0db7ac8193af1fbe074dc1f6. 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/CH6541759771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20314dc2c9ad165aec0d38e4f28eea3626a1325f5224ae2ff3e503b047f6ad8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEG932101759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4361a70f1ae3fca716d8337ffb2a12f2a63e29addaea0a29d8c79780be1e97. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEG932101761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd95112ecc18f667bb8bd512af648e95cbab877641b267d9750456361dcb3b5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEG932101762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc298b7a598fb3d46728decd44ba0a2c6d20f940ed5fce873bdb67218a86c57. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:40Z), 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/DEG932101763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708e26fa848f8d8951513020214766d6d0176260cc01226e3f18be4921240e9a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:18Z), 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/DEG932101766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff69120e1366f6e3da065ebddb459186dd2fc4f590bb75fa19a64e5a2afda63e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEG932101755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf18ad60877c1b2d2701903d36318495018a1b37617b4dd19e097ef26b54bb8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA011682103.