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 0xec4634c31e34f4578838aa4ed061691a808b4e0acee1e4e4f1318f8bbfc2c249. 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/298765d2-3128-4b67-875b-9ae3c342bd0d.json and https://artists.proofprofile.net/proofs/artist/298765d2-3128-4b67-875b-9ae3c342bd0d.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 0x4a5531f5b88a4e2bbde2e581a2453f70db2bf8d3eca6cef4a943896f0855bc7e. 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/QMDA72161742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ac20207e9c4209b856e8719c9da6144611f3be025029037f8968b116a525c4. 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/QM4TX2200534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f0a63ac351a9d56791a5ac39b9590e5b1a525aeb9804f8b06765824d27b311. 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/QM4TX2200718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cb4d9d78ce175c859927f15712ef13a762fcb17b3b90fcb7ffeb4b99472da6. 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/QM4TX2200801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d71297bd5572e7c86a4cb264fc230ceff14a8601a178090f15419c44a54209. 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/QM4TX2200819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e4b36e2f2c3ceabc5903d595b2e3b3c4a29d32bbb97972470416ec595ea670. 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/USCGH2196487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc829c9b7c535f6c8451e146e37ceab551169fe8405ac526cf6dc77c9e20b531. 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/QM4TW2239515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5353170cd71fcbc8a6ff5c05cd14b47ac12b2ece9f384aea95bd475b6451b5cc. 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/QMFME2394232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8407cc7383cb4918de26d9ce95cfd0b75ae1f625c4dbd80460a960a230eea67a. 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/QMFME2394233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c6185c35c2bbf6f18a2b3049864869ac98b73a951376d151362a31753cd360. 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/QMFME2394234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9715d374a55eb247a46400fd2b441c13940600cdd0998478a8a722580c788e. 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/QMFME2394235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e5ebe8518f73715a9ad868b6afdb6bf017d0b0ea5914d699e24bae33a8f290. 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/QM6P42324424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3e8c23b83bddfcd62e56e876d2241988ab1f3c9dda8f821874fdb8a36dec05. 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/QM4TX2338523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41642fb791e19c83cd70e67672c4e5079a138f169d71e1c65be2a00b69b0b869. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QM6N22234704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc675f9c200092bea24117fee07201c174b058ee4798305c39a0098747116075b. 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/QM6MZ2216025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc829c9b7c535f6c8451e146e37ceab551169fe8405ac526cf6dc77c9e20b531. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM4TW2239515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5531f5b88a4e2bbde2e581a2453f70db2bf8d3eca6cef4a943896f0855bc7e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMDA72161742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66169e53fe79514215610aa12116da0f509a606f6fe4caaf2681228c16bff53c. 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/QMFME2193853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe408665cb632fd74fcf31506752f49df4637c5be81c326e1f98d38f4a45997. 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/USHM22141396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e4b36e2f2c3ceabc5903d595b2e3b3c4a29d32bbb97972470416ec595ea670. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH2196487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ff6098418fec1f686b1714d1f0c26b09c947ae93328e99000db01e65e774bf. 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/QMDA72203275.