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 0x712992d615da5c86203cbc55e6d9d660d0b0cbeb9260358d1da31b8bf8e8a3c9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89a4e832-3342-4e27-890f-522eaefba550.json and https://artists.proofprofile.net/proofs/artist/89a4e832-3342-4e27-890f-522eaefba550.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 0x4edfaa2e33d245a4ecf7c5430dca3cf67e804c2491b762183c122045a812abff. 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/US3DF1823459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08942a9f62f4a080ce7790ccf1459aa7b70d132724836ca8d85efae2046564e7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US3DF1823460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4d4728a057264778cdf40a72b12332cb2dcf77769027136331caba1d3e7895. 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/US3DF1823461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf2df1df06ba4184ae39f21806b74a79bce71802ea7acbb7f907436509f8006. 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/US3DF1823463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a76b50a0e1c72577ce30c57edad60749cbcde29969e90d17921f47ea960c76a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US3DF1823464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4313fe4b92bf0016e747184bc065d7f25487b0871de28e26dbead4128292f44. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/US3DF1823465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dc5b0de82e4475bd0c806bf4f49c453cd7cbb9f9089da1de3281f4ff655877. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US3DF1823412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de26fadc231da51f54457669324a76f3b3845a5101dbe172d3d166f2de148b3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USANG2154202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0c5c9edcfd1835aca8e194deaf11895569aad7428e8ec85285a1e11c3cd42a. 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/USANG2154205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1714b0f5d547843e91f91c8888ea0d170db76e9770339efce7616051c745a0. 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/USANG2154211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847a0fffca2345c81911d4139ceb248f906c2569d031a05b34a3d70c2ae6c18a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:34:11Z), 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/USANG2180524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea0fc8b7d0b6b830b521ddd291000da3a1e3e02ad6dd3acde44c01025dcbabd. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USANG2180525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762833f749c0fd5aeacc3e34f6f284c4ab4d2daf910efc070d23f2577cb96060. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:16:34Z), 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/USANG2180526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e2b954a214ede6411b1bd26a01b9c6619919b4ff40f5a0657491848e928b7f. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:36:50Z), 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/USANG2180529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85d5460ff8d31ab329b9c58eb9a2b660344eab577fcccd61fed17e9c0793e2d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USANG2179889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470c08539f02e0a0737c506301960efc467cc4bdb0b702b874fdb6d57d67f82b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:03:48Z), 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/USANG2179892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8450d2fd4d6f035eb118860c5882f4acf4e643e13f9a832747b5002f7d2783f6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:55Z), 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/USANG2179893.