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 0x941eb9270ee4c86eab55b1194aaae0a9bcce15f0ad18e08ce86228271356d88e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/476e26c2-3d3c-4991-992b-de2695a58539.json and https://artists.proofprofile.net/proofs/artist/476e26c2-3d3c-4991-992b-de2695a58539.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 0x8424434d4adac9af3c9be16dd7e934691d2b712dc98ab48a30dc7b35f0b6f49f. 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/SE5W32204597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92c55bdeaf1fd0c9f33b8c3e66cec3e9ed1672c15dd35d128de97dee8b7731e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:47:36Z), 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/SE5W32204598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cb4f978485912640eece7c044f1cce3aa43a14fe51fcf32c57167fa117b2c6. 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/SE5W32204599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe247a4f051bae7d967d312f4fd3f088302b912f244a051869df874c8b04a9eb0. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/SE5W32204600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2abe71787d4336a17a27eefc9d44ad3233a33ec6ff970be7ca57768d0775b0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE5W32305443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe26dd5902f3a36ffe18efb75d7a9f6dbf14221142ec2aa94c18416cb663d44. 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/SE5W32306281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129ea0bc21e7adf5b8d3c35c09778929841228e017cf684cf0120aa97dbd09e9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5W32405364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2027019d175a03102e59201c2e935f9f159be687126c156011e1982840dc3b2a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:10Z), 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/SE5W32406116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc873f8e92b7c9ca342ca1bd2fe6715a2df52dc8045c3f3bc7f49802b5b0a5a3f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:18Z), 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/SE5W32505321.