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 0x5552b30b907eef06bdd7b562de3fc020ada16aa631469fdce3482333801c4978. 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/d1050b14-10f6-4604-88a9-8c46209d22d1.json and https://artists.proofprofile.net/proofs/artist/d1050b14-10f6-4604-88a9-8c46209d22d1.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 0x542340a6188e324e58d1ff7ecb47fd636642c00052faab7129cf7cf93f8b53b1. 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/QM4TW1651331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9dca55f8f7da8ffb878429867e29e5cfb15d26d4834cbc92cc2b95a3d9abf9. 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/QM4TW1651332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542340a6188e324e58d1ff7ecb47fd636642c00052faab7129cf7cf93f8b53b1. 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/QM4TW1651331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9dca55f8f7da8ffb878429867e29e5cfb15d26d4834cbc92cc2b95a3d9abf9. 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/QM4TW1651332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e27f35dc2280742c45228c2ae0b8fd63677709a703f1493f9bf0141dabe3322. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:20Z), 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/QM4TW1651347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902aa2aa9c774a972766f674ea9d4526f46ef3d8cc10086df86eb46cdee7e827. 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/QM4TW1651342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2ed4b2da6cf2bf86f8778d3f86facde898c2bea4109066ff6c8dc2d8bc559b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:01:14Z), 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/QM4TW1651346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cb2c5f0130e3895101f1c6bd9f189bbede390b9a5432e7db9a9aa71c343a46. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QM4TW1651349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528e59c092d752cf4c761654b353121793e06ce47f9bd5a5d1237f26e2d54bdf. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:26:04Z), 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/QM4TW1651351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9ff7352d0f3d6f06910ded59f1435cf1a42d1aa58f07fe6578b24067a6ef5e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TW1651753.