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 0xb162f2fe02de6d4143f0296952090ada0867689d4ac4b34910354b4ddca3ca7f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/398e052b-cfa9-4662-b3b8-a61d21c05ebd.json and https://artists.proofprofile.net/proofs/artist/398e052b-cfa9-4662-b3b8-a61d21c05ebd.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 0x7b4fb10514ea409f69740749b68695220c3239064f73013d50ac00981a3efee4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T07:00:58Z), 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/FXR432507281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83584f003085bb563536cbc6e67a3fc099eddc51fad6ac76d1c6e252b9c96c79. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/FXR432507282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199bb43caafea3d10511ff63864aa9fe705236524128782781be3d1d6f343dbe. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FXR432507283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eed4cd2edb7fa2bfe0ff48bfb8e1ccabbf591d44f485a89659374c387c5237. 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/FXR432507284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58ef8c2aadb5be7e5bcb40e0c1b0c1b606af1b67aa4f2a8d8ca8d23e4184d13. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:41Z), 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/FXR432507285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a1d94c531a217766b97965065dedc9f7455c862892636dd51b178b9e1ed6a1. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:09Z), 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/FXR432507286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34424cbd9fad2ce60169a6dbc9b871a9e64fb2f31b5d06f586182bc36c3d9dc8. 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/FXR432507288.