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 0xc3ebbce01834d4a675a980e66f9d444c1f182aefbc244c6fb0ba0af387f09949. 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/d14350ac-c47c-4c1f-8a1e-ba30a874f7c6.json and https://artists.proofprofile.net/proofs/artist/d14350ac-c47c-4c1f-8a1e-ba30a874f7c6.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 0xcef155d785c72996c1e8c5be9af1f1e62c003eb0bde72a9c350f796456d66769. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USX9P1358553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9de23d10563b6858ccdc26fe9f7c586925c49cf5372387628d5d2de8e4bbf21. 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/USX9P1358556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e99fca936662cc0010fc185abaae71051a62c9601cf4bde42039abfd4fe6656. 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/USX9P1358557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8fb7d6201d2ffa142b6acfb484ea3a67320f027042ef1db918a1928ea2c3bd. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USX9P1358558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b357f5db48ef968703571154c730e1679582524f95d2c6dd762191015cffa2b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM21482838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eddd024f313a257d7c415319a20d286044f70ceadd5a89fd3073b71ed1f3a3f. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/QM4TX1522369.
Chthonian (feat. Skinhead Rob & Travis Barker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2254580512693ffe7005803c81f7fbc3b4602c189bb9a7d2206f84867fd815. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TX1522370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b94dc83b2c3ac0211dd9a7df4d7b80852ca004311074857bcd69b3297640a21. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM4TX1522371.
Friends Are Poison (feat. Travis Barker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e132fae265c78561e68a365fcafe7116a4af6fe08c0bd227de28c9765723b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM4TX1522372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0b9c2d0e62c17487cb6dcd568c3ff56eee91ef94144f4ba8c4c70bd0a8f175. 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/QM4TX1522373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d488db2801bb245a70614096402d61d8b53b726c11e5b99dd64c4ce1102e6bf. 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/QM4TX1522374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ffa3290a2d252cc33b8a70057fcfed3008063d2488320b0d906abccd2828fb. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QMRSZ1702789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc581d696bf576622790aefd05b75b6829790b6c4777726ea10ca5943edd55121. 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/QMRSZ1702790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d75edbfdb14046cd59a50b8494649ae824188b3657dd9c3d5dcc92abbce5180. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QMRSZ1702500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d6da91a80d7259c34b3576f1d5d93dd0fcc48d5dd41c4bbd51c058a6871df0. 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/QMRSZ1702502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2c834474a9161b83ee2a254767efe3959071f942665ffb51130234d0862dea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTL92185514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f39b1ed8d94be0b9fb780f89f5c1f8ab8a613293e76944f319ba3f764998b5. 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/QZTL92123795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1391798a45517b609f7afe6382989c69f47aa49dfc40f2f432455bf5911e6e. 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/QZTL92141496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb378e761d6202e6032e37de51accf6df33290fbbc1f90cd2ee323e7f7a15a49e. 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/QZTL92179577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab71bac9ee40e04f229a57542545624947f1cfca55b19cf8485dab89e193887e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTL92167576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b87278f8ceeefe778f8bd445d396bf3074d1f2c3be26885d0c43338cce12f9e. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/GBBLY1705221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6307be3495c106eccd1d7552109a62767b77ce4cdfec7db298b6ae8936147b3e. 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/USHM92217776.