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 0x085dd49ee548ed532a501c3ca54ed86b6ee4a492cb2b753ad66b050eb5d4acf7. 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/e7c60f39-1312-4af8-baca-54374dc3f04a.json and https://artists.proofprofile.net/proofs/artist/e7c60f39-1312-4af8-baca-54374dc3f04a.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 0x6020ce26ac0fd23610b9331f41e07a28723e4567e7aa3dda9ac7dd3e50f5a1c1. 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/US3DF2158267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9311c2c28a77169917d86adab94951fedfc61221a1341f9ea39e01952e5c06. 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/US3DF2158268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6082d679525f8d33126d0b5401f82a37b589bc81696ef72b17152b13d87e943b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM4TX2253510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec1338a75d159107b6807c8d8fee036bef89de9c8526f7cc8c187b8eaa562cf. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USANG2223228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608e0fd13556770a68f1d88ca82a3eb1e384b48d90edf91bb758b19f63d92cf6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USANG2214940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766fdfcb0af5a205a78c751243af0b30e4bbd2353f4afa3c8929e4f6be285f04. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM3DF2283731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1f8a8f7c232e2f523c70034a118d84e5e2587e774333e33777c713fc0145dc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM3DF2283732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2804f23fa1f7455621480e0ee25bf738aa21fb0461f47718ee927c6a6fa5ba. 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/QMANG2218396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53679ccdefc2497dceb994dddfee8a8022a7d1697ca2f502b65ab25733f9ed5c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9Z62400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c3e4a5b14aada0568d24e7d7c5065a16100bbf99f27b5d6d54fc26de2c467a. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DGA062477305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea766a8a6b0c116cf55022994315f5e81853ff6de475a366ed716877c3008284. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9Z62400998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311456ea4c41c78bb14184ef2e37cc5493741ef50924616ec7496adeb316ba12. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:31Z), 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/GX3HH2570966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3485bbdb12790c9fd259e512da55531407b7def96f3b09ac49ffa7eb631d50. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USANG2432003.