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 0xdcd4f60eb7efeb0838d7f80a6568bf7ef8762c04f815aa8b60579fb1fc3436a8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74d084ed-ebd7-4d55-a323-64f404f68306.json and https://artists.proofprofile.net/proofs/artist/74d084ed-ebd7-4d55-a323-64f404f68306.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 0xb71e9cc78065ad37cef509748434668f230bafb963c55e14907c6177d8876c13. 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/QZES82311417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76625dc45d8a321b6875cc1a6149e3da7cb983438da889fe86b5eb2c3611b2fb. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:30:13Z), 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/QZK6Q2329458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9949008d2085cf3dc65e62f91e000abd20488081e158c1d27369e9834568bc2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6L2386002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9d01995ed5532cbf5c4f4c7f73af244ff1cf19a3a7c80143641ee6299061c6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZTAT2384138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc3829d99d35ab6c2f83aa705f96ce7a1cc38c5dcf7950094bd3bf9cd5ea74c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:27:47Z), 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/QZTB42386983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe011f2ec549dd65d1d0c6252f74e726ac060052d41921e33a4d1139f626a35cc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:19Z), 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/QZWFJ2365026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8c2ff8e0cf8785a314b583f9df82918034030a3f45a0d30aa8f29799b59851. 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/QZFYY2489327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25eeb8fbf6efe5de587437bbbd9dba7dbb1062ffb8dcb2022884bf65b3ee2021. 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/QZFYZ2470105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64e5cee7f789cad0acb30178f75315e2f04b3fad46543d6b582095a107eec49. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:28:25Z), 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/QZFZ72473785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdd7169a49d7064fb1864c4f6b866c9de1b13a383fee4cb7a456ddcc6ec7639. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFZ72473786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a0c4630cf949fc0e2ed8aef13a3bd173b40750688ab9df9f533b42c4dd6507. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:35:22Z), 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/QZHNA2448309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8b8688ed4b82c412535d56d169b21e9f6817640cdb2e1846fecbfe66a81973. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNC2446396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b971fe66f1892d92cce654bd0f934d8a3341e5f7d04bf851072285ae0a2601. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEQ2479138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2083b7002c17d480bb1bbd249bd10eb6e6eea348c7e9f9d3d8fe28fe1cc59e37. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:03:05Z), 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/QZMEQ2491545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9d01995ed5532cbf5c4f4c7f73af244ff1cf19a3a7c80143641ee6299061c6. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZTAT2384138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd28e8868c2184d34f091e8134217fa53370a1eeb161fdcee832c9c01f51c83a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB92458042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bd7b6f0da23dca479138b238e5c37ee08480972a227b0c4f4c2d9ceca2263d. 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/QZWFH2535913.