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 0xe9dc179323911787746f64d7614ac2b0366fa40d069c8fa0aa01b48ee456749b. 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/3029dc02-0ab6-45d7-b795-1df6aa1632f9.json and https://artists.proofprofile.net/proofs/artist/3029dc02-0ab6-45d7-b795-1df6aa1632f9.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 0x98a35c857107f391a937414f72cf3f926b76786feb58a90b8ce68e7f76aa5370. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ22140478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf7806f3d1134e18279a3ca38e2f0144796853d7f9c15de5b7cbafacdce263c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ22140479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3acbd77e99628192b72f5862b1f29c34bc6e8d85d23b53c7117dec6cf17e1be. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ22140480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc29ce00852aed15aeb884a1b0e598006d5447baafc382c26157eae52eeb01a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ22140481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082d09d812fe3fd3bfd012aadc1aa57704773841febecf04c105ee331d2df9a3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ22140482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f59944d40be91f76527d8d9c626670ab9dbafb4c88970485aa8c8e0e0d7a6c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFZ22140483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a1c4cee926c7d7425ad4915d9e94198ae3427f33ee24c4743a471823bf4443. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ22140484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe9f3769b786bb97659c82e3e7a482f6ebc4fc3fe9db5f995f9894449128f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ22140485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eee26db19f34b5df0d2400aa138e2fd44cb91eb79847ec76ebd87638f37b84. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ22140486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45478db868a6d35a6831c37b830e80cbb3f5232df5268396c37ba9d112341b4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ22140487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178577887e93425c55a59288c604c0d41d2158a4e53ee6dd4722e97b21b83e5e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:23:21Z), 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/QMDA62147138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b5eeabff779870649a35fef125c50cc3aeee4acc733010c0d3b1f9d15abac5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMDA62147181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66169e53fe79514215610aa12116da0f509a606f6fe4caaf2681228c16bff53c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2193853.