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 0x8f6dc418438dcaec71f96d613b8fcb38d08cb3f030b1ae0c3b21024a6d195a4e. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d75e25ed-a77d-4579-b89e-33450ff36cb8.json and https://artists.proofprofile.net/proofs/artist/d75e25ed-a77d-4579-b89e-33450ff36cb8.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 0x9ff863ccac9b366b2104b27519b6ed1be5e5720d6bcc31e6ccb2684c4f7096a8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB72569019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce7e0864e17db9563967c5c7919387ca99c6ea3aa8a426a62e2e313f1af7b88. 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/QZTB72569021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20afa3fd67b451b7d69d5f3da41c4ea3c50d86f9c8d2c7d48c1fca4461eb4f9e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB72568979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5620947e23423fb3ea8c4d96277240f5bd25594a98ec30c4aa556a5fbfcc1a. 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/QZTB72569010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5117bf79dba24ab2cb632e6a322eb0978d0f16c52565ffab9047cd11e4eb430. 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/QZTB72569016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a221d4e097f0ac525550909f14d1c114704836b9bc06ea8e3ed8085e89cea1. 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/QZTBF2555735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54618366d32cd70ce9783b60747491864fa31113323a39e5be1048eec79d88. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBF2557542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfb477a6039c17af7fe98cb70edd5234de8ab3a8134ea532b6f45652be6a116. 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/QZTBF2557488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40acf0dbeb0a77286064e57d59a1b4f070935282418fa5b72a5e537c695e57e1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBF2557550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda121762456767b4665f2e811864315a0679f462864542adfb75ddbb5ca261fa. 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/QZTBF2557515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3375a7f21f30daa2cdd483399679c8f24993d673b383cc3078ca521e3fad4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBF2557516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305f209eeff7029f18e729a8d28f8d3677ba90b1ab2425894e98199a09725e93. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTBF2557551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91e3755dabfa5e8a08c227e3b2800220f7ef0e2051f9fa5c3230cd7ceefe3fe. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBF2557535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3a1d1785cdb9ab65cedc31492d3f103ab5fcf51995e08ad759735fac092153. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBF2557552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5761cca554f14cc7d9702b1e2f1a52ec0a255dcf2378f0dff2cdad5deb44e30f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:36Z), 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/QZTBF2557509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904d11ac85aaa3adb6e9b2317066a5e44135707a9a3c1d03e1c9e1b02871c0ea. 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/QZWFF2584170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1461daa6f785e9b4bc8b2fd202dc493fda6b38af8b75032790c594a03eab6b01. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFF2585953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e33450f859552926b5c5236743e090eee55f7cfabae474564b69deede0b292. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFF2585954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe68d65db8a2f88b26d485f2b9f63bd0a362224d0d2aba55b90a5e87a5bc8bfa. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFF2585955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7601c2178166af6acf670bb810bdc86012bc0054e24143edc4efd12283281e04. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:13Z), 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/QZWFF2585952.