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 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 0x2b28b9b280c3c3a743d244166456dac3c49a281afb648163550f78f8b1c49b46. 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/26e41548-60ed-485f-951b-c66cf6a29d88.json and https://artists.proofprofile.net/proofs/artist/26e41548-60ed-485f-951b-c66cf6a29d88.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 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 0xe88da5a19846648f41ce9b2e2c339016cca2eae074f9b1ad3d5c656cc26b6b20. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEBL61043986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd744c7558a12291c2aa0cf59f01ef7ed96ca95e57996e4e1dc4f9785b8c9e8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEBL61043987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934fed4bfe427190a8f2b3c19518fe15b99a2bee6d2207070df21cac103148f2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKQU1410588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7561ed91f1b4f991ff00e6bab7c228d80127ea3b8c32dbbc280f8a08bb9ecfe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEAR41636881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cd217621dc7405897af57c31590a8d98c59c7c588d66994b9f16c7e03c48c1. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEAR41714053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe83ab6fe6bff7b00666df1b41f1479eaea6d231f07de1672217bfb3071970af. 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/GBKQU1966611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149863ee23460d0e7c57fe17231856d575cbdab8b49467ff27cba48ebf5f5bca. 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/GBKQU1966618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f670f6d8a10b99326806c7f306142ea6ac6e8a18cfa40444960896fa3748a7. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/DEAR42077267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b191b3e7757e777044d158a5a22433549b50f1fd4d713d410f15e833641131. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:20:08Z), 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/DEAR42014808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cc9eed4e719b16ca189b6063a11b999d063f42e9b9f30b7245ccb5df220dd5. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:53:42Z), 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/DEAR42025049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0fdbef215d22460e62c897172e70d27fe34bf077efab9be63fc6dd027e4cdd. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:24:30Z), 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/DE1JN2440564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02be8fbc523d32bddc80c0d6420de71b0ff7d01f55696ed8d6689187e3cf3308. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEAR42563083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d14c7a13cf21fbaa1b0850a8eabb46009dbfde98a7e5f165aaa6202ac066862. 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/DEAR42562894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3902f207909d5020fcc63349167baea9e8c699a36d62b65a59c1017e7e65eb9d. 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/DEAR42562990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e99bb3bac247f0f70e0c00d0d28955b30c2bbc337789eb63782ea17d9789d6. 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/GBKQU1596248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe591dfddc654fe0143f6013b0829a389468f8d8fcd87cff1bfc08eff31a5fcb. 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/DEAR42049117.