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 0xef35efa423d3ec2c91b955af047aea46c5073add5720662ad5639c627a870032. 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/6ed9619f-5dc3-4a40-a792-1aff19f984eb.json and https://artists.proofprofile.net/proofs/artist/6ed9619f-5dc3-4a40-a792-1aff19f984eb.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 0xa5bc521fe66a6ddf30cb9fa8802da025a4f2ee8060a808a72256c0a8af8ce19f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZANL1726103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb904dac97dbb299eb0412af044496e747b3a1a5ecbc6bb73c0008644ab21b8d4. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZANL1726104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6220d5fbb8d45b19de58c6f2a179392a81d36e431676ecf2e6af80f46bdb29d3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:35Z), 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/QZANL1726105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf74a84a44f69188fe01696253769b604af136abd2a6b8eaed2530bf8a3684e8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:20Z), 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/QZANL1726106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3506792741abcf549a5f11e27932ff044be7c31047c8bd603d9746a162ded228. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZANL1726107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b14ef76da3fd224e94f306a13a60aaac9b340e9a1159ce7409267f1a7a0db9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US4XR0417201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfbbddc3261ff99544f85b8541c3d87ed1bd37493d14289034ccd8a846ec154. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US4XR0417212.