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 0x25ffa570ff69bd103c50bf7961a5092b6159eaeb3561eb5ccf297a306ef206ab. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89fc4421-aca9-49c1-8472-5ae3765d107b.json and https://artists.proofprofile.net/proofs/artist/89fc4421-aca9-49c1-8472-5ae3765d107b.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 0xbbbb376499917a444ee98b3f0fea794421c580d1b124a8c732d1615b25135e7c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:52Z), 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/QZWFS2490748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd1adafe4d515f8fd8441fe963aa80d941e87edb13df1b8fe630f080c1cdcbf. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZWFS2490749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6ebdf5644995e67fde93f841f860d76f315fe1f086e95722cd8242ea195568. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:32Z), 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/QZWFS2490750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca06bae9fc534fc16678cc42bf3817aeb0065e0b5449615360d653411c4268e. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:59:39Z), 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/QZWFS2490751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67711af2f1476174e5bcfebd701ee27f9252a4c7da185687b18f11afd10cb46e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFS2490752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2359f98c86c4e5d08fda4e574778e14f503878f15947dc12e3a3b116d90ebb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZ7V2480686.