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 0xf02a56c563c80a58b68c06a1e286074c16c1e260cefc2f092f803e093ac43fe8. 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/beced645-b375-44f2-b277-2739db515486.json and https://artists.proofprofile.net/proofs/artist/beced645-b375-44f2-b277-2739db515486.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 0x506c31eaf341d3cc6d02f90283c5db673f91f60697e96a46ab53ca441e0eaf65. 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/QM6MZ2120712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b0dc87963ab0929943409e1e5cd54ac874556dc93e147f7b2adc69f13d821c. 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/QMBZ92289399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea8a837ef91e23f2c2ad15f4e84cd696602d988a724b4afb615944b798b4219. 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/QM6N21924663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6d82c6405abb792e91730150070cc1adcb23ba75cb046e22f88f7434453b0b. 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/QM6P41934683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56084551c93254c55337e22da4c67383dd7ddeac78e17c59b10ac5cd698701c3. 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/QMFME1925413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e47a3f4e1bafcf30a70118fd6965bd1b0969778bbd23846a8a71a8d0f8f9d25. 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/QM4TW2022215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779b51c635cd7ca1061fac85712796cbc219409f774af7147610d71714f5e7f2. 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/QM6P41950548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f62998acc215091dd37e53f75d7259c27c9f16c56a958e4de556e115f47d4c. 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/QM4TW2256439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd4c28c9ce1e71af2102a4c9c90b539678b075c98d4a71b84403738b67a9d27. 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/QMDA62149442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef38ca7681f596c3eb68b0ad4c537bf77af034b87fb6b7aa5e48dffd65f0bf12. 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/QMDA62127626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790329e0705d57ba4e1d3b319104c33b2b1d6d5768b7d1397478469bde6d3633. 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/QMFME2148854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2833288fb5d810cb66d4f7d9ada5e3954e6f85c670c6a6962a521a1851483449. 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/QM7282113224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b01287f040c2cb12e5724522bb4de326c35e375783e500d5775a0fe2c66b84. 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/QM6N22160512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd7167b8e77e7cdbdd7bd70c6891c474e9c6c0fe3c7198c6c7494a32d66a0d5. 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/QMFMF2053901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262362db8c3adf1a78cf5e4fc7276d0b8e560e494d78642fa99d937262fab8e2. 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/QM7282099768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c819c5ed4b181226ee4921e68fdbf71afb85d16aa680bcbbe288e44cf6cb71. 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/QM6MZ2084793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a3e401d7ab3950c257c8d5f6ba8d193eb220a310a640c8175bc01fc6efb0d8. 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/QM4TX2076967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56084551c93254c55337e22da4c67383dd7ddeac78e17c59b10ac5cd698701c3. 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/QMFME1925413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98d2430596cdb99bc104abec222bdc086bd20d1a411673190bb2b295adc525e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:04:04Z), 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/QM4TX1904685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bb41eddf6a4efb0c5a7d1aadaca8ca1077a2a14d1ac5f612a67c22391710cd. 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/FRX202354716.