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 0xa667ff6ad77cae70f13cc26f99c8b07a012ee76a2511234ae39cd998211f3475. 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/0790a68c-c4df-4264-a9c2-048e1d36e9ab.json and https://artists.proofprofile.net/proofs/artist/0790a68c-c4df-4264-a9c2-048e1d36e9ab.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 0x786d2b66e1018bb35f30e25478b95b3e258f56d7105b57390c283588a618f75d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BCUDJ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf50be98ced685dc8687f47dfa2223d4d5929306d95381597a38e61321c9027. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BCUDJ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf50be98ced685dc8687f47dfa2223d4d5929306d95381597a38e61321c9027. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BCUDJ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c124c2c71b13c63d63411fe6f58acc5d5ccfba31d8ab894d50a0ff5836bd670. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BKE2Z2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e3bd45d31d8a2fb81d093085d2986ce82e6d663995ee30383ec27c542ad5bb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BKE2Z2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ee5e485c502113081d03e5e3f9b4014d619d0e0dcc37cf484037c3832a61a0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BKE2Z2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828345b0b0696ee8d2c230aaacfb26ba003aa6d29ed298fe97624f0315e942ed. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/BKE2Z2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407d4ec26da654718e25afd7319efa3264ceeeabbb2ce46a975e26266f89e2f0. 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/BKE2Z2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbce70c890697ef684b638dae840d02a15a5e3a22202f20e81ce6e9a834467b. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/BKE2Z2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4894065e655a7329752e5052eb6d9435c3b7c840d73c343bfacaf076598bb04a. 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/BKE2Z2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f613edf839b3cffce8d5b88d25ee90419ab10779c2a1888bfec0becd5c4c9d1. 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/BRGRA2110003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eea4bb5ef926a3d1bc133d716aa17b9e4f502751e56e58c0a140b849496544a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCUDJ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44153518d57b902d25d8965aa0f67d4d186a7b9f25ae64990624d7f7d82c40f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2080176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68ac5515dcea9cb3c0f129ca5eaff1ef72ab189c458dab69498ded288ec8ff8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6TI2163503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c64558e00bbbc0d115df13c8d6ef8039007c813dfa69b60f8502ad8c482a8d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ42103246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd118b7b37dc81719a834372a0bb8128a2f12d7980adf35744d4f134e9399e32e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBRKQ2160559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b66be414f9f635ac8d171204d9a72da001d6aa2a96b7e6fb564535d1040d1d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BR9Z22500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a292069208c5b74c2fd3b33eb8792cadfee4152cf79e4776409482081a0ac6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBRKQ2249187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01477edd05206a90646fceac86fcf20d7ce0005fbde348a589de8a7696313a32. 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/QZTRX2293868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6e5533e1563c8d99048bec51c88312ec35785710941adde18de431c6cdb36d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX5UA2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5b5766ea4644c126b04fbd750b4b65ca39a44f33ac3552a2a08e2f5e5bb561. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:41:56Z), 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/GBRKQ2160569.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c535e81d617eae289eed2b2958f32caec590ddb2a5fdb35507558ac94e3c95. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZWDE2408462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a645d8760eda99a014d08e700458c72e462cd784bace8ae279dc46db33a86ff. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BXIV82450195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e8bb5f80609f3ae61d2e4965641532acee732bd986071c8c36167b569d26f3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZGLM2215281.