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 0x758ef931fb3ec38d496fb2331784d66c74453f458764e2bf22c1fe08ef49727a. 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/b24f66c6-e694-4cdc-a8c9-3ca63ce9d79e.json and https://artists.proofprofile.net/proofs/artist/b24f66c6-e694-4cdc-a8c9-3ca63ce9d79e.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 0xbbafe8fed1d691c2cabf22d7b793bd74eb81dda8ec0196aa63d2006603992d28. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2332244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894dfd5cae37dba43d7d88ac464d0b2d70ff3fe394ade3f2b69816913f5b3da0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWQ2377004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0564c95f8cdad27fc4973c74f67bf8140a1f9212edef5d6ce741278579ca9190. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTBF2341525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2501f844b1ff71e8530e957014697ce897a4e0149c47596103a81b7cd614d75d. 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/QZK6Q2439036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc3c53fcb570c0efb8eed862d4c892d070c9bd0409c979f08aa3aa50c6fdac0. 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/QZTRX2443836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1141322bcaf405b6332511e6468d4f4f105b930c0d84326f7d6d7d310f5bf2eb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USLZJ2537221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceed26c4e8d721cf1a118d6acddd89caf7a10057d8ed0eb52ad6c988906c5c9b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLZJ2537226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62ad79460c8770a8e94fdec173f80d705b676eb6c6c115a99290f47d1e52a91. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZ5FN2549385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb62048c295dc1a7f7d80dac56d4d61a7bf3dde9df9816d980fb2ebbfdc7bff2. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USLZJ2537236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bcc300e2510a0493492e5ab9864d945eb89501117d45f4843a215227a6b5ad. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USLZJ2537231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b1e072ea67decdc6e7674b325e5b32195eb1d7ed5d86df4f7b4dce0f780543. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USLZJ2537237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ac840768c85928c1d89fdb30c860dc31a1f07acbca8677e3c640515fcb4dd9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBWUL2540387.
WTSFWIB(Wash These Sins From Where I Bleed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca9f0697c8c7bf54325a4534ad917d9d13c03e402f007d99df09d67c7e7c667. 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/QZS7J2484422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f661ece25acd48c863aebeb7e9bde09e6e031237c61490d254f38c52be708b. 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/SE66N2298313.