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 0xcfe3c3f1cf2840d682425ae41e5f424565080a93369a023826473f119bc64116. 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/fb225b0d-606d-47a7-b269-55554ffe5341.json and https://artists.proofprofile.net/proofs/artist/fb225b0d-606d-47a7-b269-55554ffe5341.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 0x3b553d65bac0f9f0544160f4846715df2a02e26cab107615b173f42af4f4aeba. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZNWV2199454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b96ef3f68dd2ae034de4178dcd000a8055a57fa835fa5e3821689dac5f151ff. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:05:42Z), 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/QZNWV2197095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789b26870e8f1e9f1b45a49280663937d13b3fe597d781c2fe1e617192eb3d7d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:58Z), 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/QZK6K2308056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fae0b0f1dab7a8602d92acebf95b05f823f8c4f4bc57c16eab93dddd658fdc. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZMEM2335183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e4cafbe4533cc31c3a693beae4b0e0053d40a6cf975ef80356586ccb622e44. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:45:18Z), 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/ZB60Y2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faefcd517da48f3eb5124be33de604a1a48904eca7456c1e1f2a2d434c93538. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ZB60Y2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fc0c17a364a9069bf213c28312462639ee4ca5b4976c6327cc75c3f1350b5b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:01:01Z), 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/ZB60Y2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec11fb9b6995d9cdfab6bb5f1347463f26d5195e5f265bf7d810b0adf25fa49d. 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/ZB60Y2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14318839d2a5f9b274a7038dea9a799faca1ef42a927a7033ed66810a0c6984e. 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/ZB60Y2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4aba590608ff715a5e9bddb5ad4ba90fc661208218bf0e3fbeb4d4bd1c549f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZB60Y2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251718bbea436a01b26d5c5febf2c9be1fc4a32eef18c008f888bccbf3961077. 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/ZB60Y2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27332c39f868f09930096f7327e3503615d069796bdac7fc6cd50af477ca3bb. 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/ZB60Y2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4b6f9baf6377551ad09ce250c09c0f8a10dcdb49e3764a91f4d0bedbcf77c3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ZB60Y2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc936de2efd3e2f8ab6de4618733da350c6bee13e65743e1bf486947fefab0121. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ZB60Y2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81c11789a9035c79e2bc4ae88001ef12221cdccfaee4167d86c5fb8506d8d23. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:02:16Z), 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/ZB60Y2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ebb24fce924320a8d37aea65ce3817718237eb7fe6be78719bc13ec1caa8c5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:44Z), 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/ZB60Y2400012.