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 0x19e0946977dba661654980b2d2f04eae35676bdaf4c83a8fc1ef09af16cc8471. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4500b5d-8510-4891-8bd3-9919446d8d39.json and https://artists.proofprofile.net/proofs/artist/d4500b5d-8510-4891-8bd3-9919446d8d39.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 0x50a59f7d644c745cbf8d1064cc87729c208e61fee6aeabd45ee9011a79fbc6d9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:42Z), 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/QZWFJ2484384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6456c329a4c8e421ac268e3972a311db4805c2611eff387fc8adfef424849e37. 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/QZWFJ2484385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd467f3e61c0505734ac7b4c5dda5f30b3319388c6fda43318c3b6043a3c5a29. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFJ2484386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6b3fabd0ff473b48e138abd39bef36356a01fd2ca67787c59841b0162e5704. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFJ2484387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c94f74f1c474f9a08157cf8141458fdb3205ea7be00734f93b219ccbe57b7c9. 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/QZWFJ2484388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44f75669c1059103632fbd95b462b2db0629a29174b3377fa1c1976896a6242. 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/QZWFJ2484389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8346c276a03f8e48d09b3bb53f7c1b408e7c2dfc76db459d06ba703d52667c35. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFJ2484390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e39e6885c01104ad123276f6611dcab37eb8df2c69eae4dbc1f36c6668a4d5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFJ2484391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d48183f012357276402be597ad1da721ef3b03fbcb96a74bbffbca2a7df21d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFJ2484422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd0e395043b433bef1a3c95e5482b3453d995e690c1596bd564b2e0fe17c9dd. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZWFJ2484427.