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 0xc8cc10fb19f89bf52479d2ad341bf78729cadf271b0b9403b6f85381a1049ef4. 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/e12e0f2c-d475-4165-a3f9-bc664bf6262d.json and https://artists.proofprofile.net/proofs/artist/e12e0f2c-d475-4165-a3f9-bc664bf6262d.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 0x8b5f2477c86e9fa26c21ffad23cc8d14c36e168dbd96391510d72b92a7a039b2. 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/USNQS1600002.
Jam in the Van - Tyler Boone (Live Session, Los Angeles, CA, 2021)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5f2477c86e9fa26c21ffad23cc8d14c36e168dbd96391510d72b92a7a039b2. 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/USNQS1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23bd22a8355724034ff6fa4473b9573881ead0f6326c009e66d23f28decf313. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/USNQS1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07660961aeecc9d1513533ff0ef3a2ed4ed270dce503a3a1246e659e09c18f6e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USNQS1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ed5b27dd57cfbaf03e3d9639e728744fc8d4865ee4f4c7baea0a88d2ef12a1. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZRUP2200903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e7c5483a10becdc289e4e51d1005bd029aa1dc351b681a3df3415de6d0e217. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:23Z), 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/QZRUP2300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a31b4bee482cff4916e5005b170852d19a27f11759243afcce133a2dc6474da. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZRUP2300523.
Hallelujah (Live at the Historic Brick Church)