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 0x54abffef1174d81e648c656a697db4d62e1c7953265cb9583b3f2b9223738498. 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/9f26f7ca-c194-47ec-a3ac-531e4d66754d.json and https://artists.proofprofile.net/proofs/artist/9f26f7ca-c194-47ec-a3ac-531e4d66754d.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 0x4d2abf932006302a45531875b202e2369c8ab04d63c33599231c4ec4c85a8d10. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAHW2486190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d003032bb7429148b89c82cd4c44ea0b837c4203d831588faaa01193c7dd993. 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/TCAHW2486200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ba1490a4805ff35693a66277326a6ce987e76fc26703fae85cbab61e672fe1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:35:48Z), 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/TCAHW2490598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24090eaff45c8eba0bcb50dfbae78f5c593e6c91483984105a0adae5e8b5722. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:07:53Z), 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/TCAHW2490609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106bbc64bcef9eb2195893d0ee75b0879e07831b3e1295ffd7c4a7f337f2bf57. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAHW2489060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468a8bb7769f33696e9af9dbaf7726d5f6788745cbc28044cabf90f2df5d5931. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:04:48Z), 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/TCAHW2489063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbcc521ecf4cf73cddbdd57101b91e26f4f5680b18a17ea91119cfe4f21228c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAHW2489075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8e28d3547de37ac7b5e0b145ad1cd2acdcf06d32296031ad7f0dabcc6c3245. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:51:01Z), 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/TCAHW2489135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb2c0aea0d3b9ba3168f1cd40e1adaceb89c4328bb45a78433fe006485d2d7. 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/TCAHW2489174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5a386972fc2e50351b898ff517e9511180786e781bca5623ee6dd0807e6e64. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIA2495158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe68ac579072951eb5d38f7eb1499d5a9fe13f7a6c83e8ca4a61afa0ebc95ee. 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/TCAIA2495188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe424d0714755733c336f86de45c6a32a2969d0bfee188d58dfd38c57ce5de057. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:55Z), 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/TCAHW2495168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f397f5618f603177c745b5060f4a7421c82889bbefa18857cc2553a2a26a8bc. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAHW2494934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a01355fe381df05c1b04b0ba904bd063e465ac8c707cf643f99e0fe6547be2. 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/TCAHW2494946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6049d542d22b64e916d94afdca3c049d5332e6b3c797f91a7f65646894cc975. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAHW2494954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a942a05dccae35faf6460d6c443ebd09c50b900abd990c5222e130e77bd31b. 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/TCAHW2494966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc2d004baf37e6c2d594659d711fe6f1d47dce34ecacd6ff94b78d4a32839ba. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:52:33Z), 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/TCAJB2401321.