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 0xf707ca2a7a76473a34facaf91b0140aeda9e26b061555cf349b4c53fa9bf7372. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08dae85b-24ab-4880-895d-0af15254849f.json and https://artists.proofprofile.net/proofs/artist/08dae85b-24ab-4880-895d-0af15254849f.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 0x0248fb6b81a0928abd3a53998135904f398d60ab33ebeabaf8e1e1be6e1370e8. 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/QZHWG1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25524d539b0f0d74a135ddfeff5425c4affce55217f7e059b68ad1d373113fb5. 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/QZHWG1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c90975911277626674f161cfcca4f8b79267e2ef21ddd44849123c3e43f1f23. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHWG1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e44866297778b10a3ee3158251ed9cd8b3ad6fce248060ab204e9b7ff71cda7. 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/QZHWG1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e83d0efd50c3f329202a02dbb5a4300ccfc779bbe9d667744896d88707e01ec. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:47:56Z), 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/QZHWG1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5560e330eb5ac21a48340bce0392af0704bf6e4e01d5961ee5fbba93a5ba41a9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMZ92388287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c708d6f6c46ca510daab06731776ddcf6acd507cbb762af443f0b13c10325c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:28:42Z), 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/QZHWG1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb88118cf584ef4d39b1ed282797a15b72cf21fe79ccfad63f26da0ddc1c82fb. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHWG1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187cb543d2589a7fbc45dcd2f51f92fb00841ce6853ace4f73a651c08369ec52. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187cb543d2589a7fbc45dcd2f51f92fb00841ce6853ace4f73a651c08369ec52. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US6QR2300106.