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 0x6d28826d9b9f06315f72e1806eea806bef2e699d8ea79392c81ee6246c9c7001. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa306f7a-f7f1-4c73-9e37-9aaf2f18cf6e.json and https://artists.proofprofile.net/proofs/artist/aa306f7a-f7f1-4c73-9e37-9aaf2f18cf6e.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 0x045ef8af2572b0da6d0dc50b95f85ac10c6dddfa08799d0e582d2aba470d6727. 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/ARD192300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8afdecc88599d88828b739a43fd0c381a97bae6b7c1fdabbf61f8a5e2a32143. 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/AR48B1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d22fc1f979bd7fdcd025c0137c4b2510b60114ebda5942f9d8f8bb40398424b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AR48B2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981c1207aa5454f863211b86d0b967cfd45b7242614cc88c76c3137299551b01. 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/ARD192300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a197796e7867e61774b1d29155dd8266d2fd81920b1ac684852f5e7ce45b974. 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/ARD192300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0557d9968e84bf16dd1c4ebfb35ca514ee667643102bd9d23b12d873ca0dfb4. 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/ARD192300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f64cdb3a7828ee784224a187a8cd7f411435e170d755a154e5208d3a2f75d58. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ARZ022300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0d0a955e3fa011ca255bfa41932917106c5606a03baca8f9da1730bdc56874. 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/ARZ022300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d99c67408b0ce95ebacc1522ab4208a1dec0e3c0d81ac4dc4f782fe4d9f03e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ARZ022300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cba942a010276a1d65cfe8a6489c92a0d883649fa1cfe75efbe5619efddfbb. 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/ARZ022300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d33e0d34fbc0ba1bf4312d345f8719958f67207ebd9121f3e6f394c9fe960b8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ARZ022300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9c770156a5269a307e0d4c975776cf81cef1c0dc93d8e7330f2e70daeebbd6. 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/ARZ022300229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585c995be22c310bc3e7b33f4982d243165b2a10363c23b7c5b288b840d26ae2. 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/ARZ022300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d360accceee63476ac345535aae2886a93e9dc687099107a3037823a5797eb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ARZ022300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611ecf2958d0eb974fcb9951cfd072bbc1def6286f5e1da67f725672523d7f45. 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/ARZ022300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b9487773d6236e1870f48b9de815c50ff4908498964d5f8e065fd705b57b75. 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/ARZ022300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b9487773d6236e1870f48b9de815c50ff4908498964d5f8e065fd705b57b75. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ARZ022300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0d0a955e3fa011ca255bfa41932917106c5606a03baca8f9da1730bdc56874. 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/ARZ022300225.