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 0xe502f629f01a1a7a9aad64907006e9c20447b0d5dd6d7c54a43e0a85e086e271. 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/3d7cc313-459e-40ec-9f13-fb18a9abf9ec.json and https://artists.proofprofile.net/proofs/artist/3d7cc313-459e-40ec-9f13-fb18a9abf9ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
All of My Life (From "Kajaki: The True Story")
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 0xa1d232b60809d9964e36b297c7345b62342ab92ba942646f422d914277fa0da5. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/UK87B1400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968b323865fb0991d5cd93a5a27fa70b6d2030bf297b5614be93977b3204f16e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA51963358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8815907a8a91dd685565bdf244477fb903d261b28a8b8c5dee072ee1b15e3a1e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM24S2003203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213598d8e395e8dfdf4f427103e0a7edf983fc8264df52503fb3f1eb11870849. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN62125892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c31dd8911cb0526b88eedcbd681b4df4cf843564094530a0975703833e53492. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN62125894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d82c4a601272d5dabb65f3f148d818916b0b33735fc18d331bc56f63b99d91. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/US7VG2591661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff18b075cfdb8894d7c5e73a83fd6ff164ba5a4c0ff1493dbae348db709a9582. 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/QZMEM2053502.
Your Side of Town (Art of Keynoise) [feat. Phoebe Katis]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d16b2e82de735d131bb001c8a010d6db60b9d899727bf458311b1ec418213b. 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/QZES92173872.
Starting Line [Syncopate & Motivate Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee92c274f72260e8a23743d4044fc257ac74111e56f600904eef398e37a1ad3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZK6L2052744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4928099690bd515706c96919bffed4df429ef86391b78a2aedcc5c14328464a. 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/QZTAU2366913.
Juke on Jelly [Syncopate & Motivate Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20552663f12d41b0635bed3534093913ffd36a9c56e8c90a3be37f4e82fca29a. 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/QZK6L2052742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b90a2b591939ab235cfe1c52fe246619bd5bd721b84377480a0680de8141e7. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZK6L2052743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4928099690bd515706c96919bffed4df429ef86391b78a2aedcc5c14328464a. 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/QZTAU2366913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d1646e008316abc1a88981493ad9cd779c872cee579abec285155ba18ddb66. 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/QZTBD2311617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4537a402b0718b8705b468154f6f38e86d20d5c48529c08d4abcd44de239c5ee. 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/QZK6P1959846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a53fe1d3b41d6b638c9f0a0ea4323459b211978d0aa186ed837a2b032550f7f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZPJ32132931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6060c31f8e451d02bd9fc732f201b11826ab37d99d98d814a75ee33847499d. 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/QZPJ32145084.