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 0x7f89d4834ca32a0288783e591132fc3a1ff0c5b9252f287fe2560731e91ca0d4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cdbd84a-69ec-48e0-b17d-b349a8f51692.json and https://artists.proofprofile.net/proofs/artist/7cdbd84a-69ec-48e0-b17d-b349a8f51692.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 0x47cfc7ceb8d27e6c11002e64a85fd60f934952596704ce85e3295997939469f2. 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/QZTB62306783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38582a30db52c59a1cb260f78acdc0637df12f106bff0125f471e097bf12b47. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB62336286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e77eb171b5170f95023ee48bfdcabc6c0274c8eb3506ff724b2d7b37123773. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:23:27Z), 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/QZTB62328834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cdd30614f647e47b5c0da96446133f9d58f3bc19f705b169965fc8e22a7897. 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/QZTB62354109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c9c4191cec00899a7f861e215b266dc9be90d9ae3ed1b4f0cb7e8aacb4ddb6. 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/QZTB62364632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5659970cf3a9af21d853c39b1d28b67f592724b8f31eba8b8aedbfbe8d86ef. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTB62351803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dcbaa6300e131a32071d57e300b2c97ed2d10d7c856ad8d84de2f533c88119. 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/QZTB62349780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab8918cbc1a37fe760a2665c96f21c6b492ec354718833f7945f484222a898. 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/QZTB72377984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051799487af0d20b8b9438db525648260bd40ada2b4167ff7cef0ee6a41e14b7. 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/QZTB92335260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e794bf124236f7eccd3a90d6ab331b11a430fc8562ed5347800f342291af9d. 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/QZTB92391816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6758666eb28922f2fb62e478ab85c51156c5cf9b1b4ea7317d02692ff6240016. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBA2327321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da016c2f26a05d29cc25a1de80fc77f3e38d92ea6452194387c1610ef521c19. 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/QZTBA2394032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bf12afc79e5444b0296f591c3b802694c1bf8961552eb3e5ae8ac8dc8f5593. 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/QZTBC2317141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7772f9e278ade20adf7567379ac6542d2911045be1f6bba3eb18f90cb5675b. 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/QZWFJ2332518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91a3e25316b3a3524075d51fe57a811b66ebcae8558f9f8c40e4b94fb9683a1. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFN2385699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89326ad917908fe0c6ec36bf8be523cca36cd4918f1888b13b606f5e230bfde1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6K2453951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5f1c3b89646d9e9cbcdf9a0b370d0f7651a94429a75c4f9667e7413c59ebc5. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6J2486656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5daf6073cd3235e4516f8ad0d5df4f2ee77561dbe86707a6580a7e0c8f180f. 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/QZK6H2425169.