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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 0xa5b75e2e55da83a3ceb479377a42eb70d20c28ef32ba258fc546a5eafe77df2f. 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/b61daee6-f726-452c-9dfd-4f2e85d7ede1.json and https://artists.proofprofile.net/proofs/artist/b61daee6-f726-452c-9dfd-4f2e85d7ede1.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 0xc09e39b106a54e10b9741c4e4ee2381aa9ee022de4723d04285aea53ca64adcb. 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/FRS182162925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969d667fee0f0edd556af3f0f68aa04b78fc213a260e1904f1f7c59c48039979. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRS182162926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1749701185f0ca934a2ab2885ad8099e704413feb238a866619de776ee0cfad0. 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/FRS182162927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7939fedffc0bccb7d6f82508350fd173e3fc4583e420f2e6ccf4b1a247b785f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRS182162928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbab0c70f99ecd789440d92660b874197ad7868e351044be7725d125c003be9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRS182162932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e7b8cf49d3478c1e050165777a59545119f9bf669c75b3b38f97662c5c1d1. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:17Z), 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/FRS182162934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdb414add4ed4c1ea16278fbb9daf9a21ffaeee1cc6b71ccc568bdfd9268ab8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA072118690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcec576d2ad3b035ac48a89eee0f80c1ade9c862241a71cbe59b3aa67baacc67. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA072118691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0287bf029204bbec2978f3433936483d5c6e805b7130746b5e202710b549579. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA072118692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e04d15ceacc575183c0355fee5622e5d75de430cd7a08c4b20b7dab89a947ea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA072118693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf74f07e6bfdd32692918ae03efd80af667400d919e9f1a2e1066aeef2a96900. 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/DGA072118694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bd686203b5f7f8a68197cedca40179b3e957f10e0dedc786dd737ead34efcc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA072118695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7425afa345d4381acee24fc330c0efaa6a716753c9fed030a52bfd0a7abb77e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA072118696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bde3e97f15a941099675847cd8b42772d81789199a2938e21613bfcad903195. 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/DGA072118698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5804b7862a75f4aeb01fa340cdfc0562d5a7ad3322a1c442b77719ae384c5b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA072118700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc621a96bf09b6b4642ee2721b05dcf003007c463516a34a8feefaed839889dc6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA072118704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c1af6e2810ecf1e6bfe646876c7e9fe2c24066a9c6bf2c762ff77cd676d7f8. 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/DGA072118706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b9a1cc18b7531ae842dc88e5302f6b84f58cc1462187607e1e322db82b020a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2009392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce86a61d4ebcec920cd886215a4b75bd3a4ca14d363525f3c9d7ffd84a06cee. 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/FR59R2009393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4fa96877e24937e78bd38735c4c8a871bf11ea77191e678dad65235c1b5d8c. 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/FR59R2009395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed74d78088348a45bcb562aab739344bd2863c853ede29e055dca5ff2de35ea4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2009406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487b53b6976e5c71b12bae519cc7e35fc1cfc0752ec11986e1545f4fd0025623. 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/FR59R2009409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78ceaa558bcfff6a961937b1ef1d4bb2821184b3b14ad8c8f68708a1d6ea67e. 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/FRX282222044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8e7bf0d6ccd02b869bc831e7b4943f0142b762fcace667a77ab9d7e802d951. 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/FRX872493517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a45cbff60babc91d6c2ab651150c37145b363a4fa1ea192ebf9656b5ec2f594. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0R2325509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615a06c1b1dca887f499f1d1282fa443bc18e520ad39d56317caa7b8613065a9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:04Z), 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/DGA0Q2388366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa484f19105a1d769a4d0d4d58105ae9f294b205b1ea3789a8905b2afe72c53. 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/DGA0Q2388367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccb7d78af3e0f32c6ee34bce42bb5d92fb36caff2e593299bd85ae61b014e39. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0P2320228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf844b8a2276c549a391b7b6bf472babfed40e748023f96c29520d5bb2ea2254a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA062290687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a65339648942b2ab9d3d0dc7bdf9c62b593b7dabaa24a2030753555dec540d0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2241339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a22ddfad2d38667629aa64991822c5b98d83b695b6836a3a7de245191abbedd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42083195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0b4217cae02e07032ec47a99c85c10d34aeb2ce524375cd29da886d221886d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282219701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e154a4d2e7e35fcaff73a32dba3e72d34e19139922d0553217a5335ddd83b0e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX282219702.