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 0xba8e0b620f1d1be84ddc708ef9874d246dabda2ae9ebd1c249a60a30f95f0fa9. 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/e47abd43-e096-448f-9864-b99cd1fb6c0b.json and https://artists.proofprofile.net/proofs/artist/e47abd43-e096-448f-9864-b99cd1fb6c0b.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 0x1c79991e6194e360076fb05efd4f4de80a4a344ba9860f558ab88f48ec540eca. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:24:20Z), 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/QM6MZ1976762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea32d57cbee3c9b737574e55289bd236875caf518531748b0510b6248d0e3e21. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:44Z), 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/QM6MZ1976752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9cf82c2d6d3a15c3f0d354be333c7ebb22c2876afcc40fa46d10c0988d0de9. 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/QM6MZ1976775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe338be5423d9d79657d5b662b362509d1b06c340313e6deb1d8fb292096f1d53. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM6MZ1943358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403645bd7247229492d91e3823042bc6cca939bbfb46cb94b6aa0365070e986d. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QM6MZ1937703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd5cba33e19e87502cede062c914c9e44605d7d7fb1f990a32938a672c0a03c. 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/QM6MZ1937740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e46d72058419876d7e7ba624b8bd18c8cb45afdb707fb60c5d76366f1470c84. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:55:43Z), 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/QM6MZ1952065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d1ff741b85a9fed729ad145e6df41e141b6ef2fca70a8c0c42544901a3ac33. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:22:56Z), 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/QM6MZ1952066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e35b4dd97b0033cada9bdc07e293f9094ce5140c58a9c221c6f1ea4dd3a1c4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GRSTY2401844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2ac0fc11b11e42199d5bc77847033dc80849764af53be32395a10a842c152d. 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/GRSTY2302109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03a14015ff664d22ea5d0a52127258202d0cb40653295bd3563ce446a65b871. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:03:08Z), 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/GRSTY2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630a2fa08535a719a2c3da503a440be1c9b44aec4f773ec53d99d86e243fbf6e. 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/GRSTY2400912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46509f67576edfd41c3966f0ad5a66c6c4a2b0912092eb2394b0bd4c90536bc2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GRSTY2401575.