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 0x9390249a6d8842e5d640fb753ea963775afe823789d47506031c73b0c9f289da. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4db59276-620f-4bb9-898a-adc1fa47f47b.json and https://artists.proofprofile.net/proofs/artist/4db59276-620f-4bb9-898a-adc1fa47f47b.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 0xebfbaa3fd9a77b079d6ebf1d026f06415b2ee515c77a207fce69fb7d50956b2c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZNWP2330401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb8e7d53a966b4e3628afae2763532d20ed5a48d705b895b93454681ebe4401. 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/QZNWP2230401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d46065420106f885a7814b9c62e283e9b040c206e07c3546ec29af2db1d6236. 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/QZNWP2230402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a3d31ddde19c7638aa8388c047c610f2f99b33aa47d206130ebe3bff8d15e7. 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/QZNWP2230403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe275d4caf5ee602d09816aaa80d9b4d19eacd850284566a19f545aeebeb3ce64. 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/QZNWP2230404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3aca54700ec12ac3794268bbfefe81f7e9972ce7ef57a760a97902d2050e27. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNWP2230405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8ba28fd9f16c9c0a9e405aec9166dd32f91010dbbdc93e737296608a490cbe. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWP2230406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30150c3c866a6a441d15a5e98218aa621536f1906aaa906bd54d0cab2ba559a. 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/QZNWP2230407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79025be4ad6ea4e9c429ffcde9803ca9d0005537c2936ce570e25f33648c0ac9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZNWP2230408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe275d4caf5ee602d09816aaa80d9b4d19eacd850284566a19f545aeebeb3ce64. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZNWP2230404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d46065420106f885a7814b9c62e283e9b040c206e07c3546ec29af2db1d6236. 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/QZNWP2230402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb8e7d53a966b4e3628afae2763532d20ed5a48d705b895b93454681ebe4401. 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/QZNWP2230401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63cc76868615181de3f94c85813b1d6e0c057802f2091a38a051fefb9658b69. 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/QZFZ62052117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa51df6127257deb5a89c7aa9251cfd6c207cd1671d5439f6d4e8c1db501012. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZES61902236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864328fe246dd51b7fffe371f5d88557dcda313ce0ac9349e94673a23c38094f. 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/QZES61902237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddebe470e872cf325aa28ca5732024414a8142fb1d1a21a4e461220bc17f567. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZES61902238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cc3d7b26a89cb3251ad2f5cf1f626b2ed1ea62fcfe80465655f9c656dc8896. 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/QZES61902239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf381d2c6b0b4d2595c488c8efeb0440a3723a2d512c2b33ba2d79255411ef048. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZES61902240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca53d764a8903cb9334d61ba8e40e2bf7fe93842ebe085d2bea3bd6bc0d7999e. 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/QZDA41910106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116de579be416438e960278ce4c5432ec9256057a2a7484b7b1bbd19f39dce7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZDA51850685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417f2669f652d03c845820d12b7bc18f5474de95b06a1cae318f39b960c739c7. 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/QZDA51850686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346cfa846857a6e769758de858030a8e03e820a5679f1155100a50bab2aed37f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZDA51850687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f76a4b1580be51b216a3f3e3c641eea876dadd310e4d27372463268c64e981. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZDA51850689.