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 0xc18fa4025610b1427f4545d0cd6917b1108f163591bd7ca5560873f87255089b. 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/e4ddda08-a288-4272-8211-61c4c5823a2a.json and https://artists.proofprofile.net/proofs/artist/e4ddda08-a288-4272-8211-61c4c5823a2a.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 0xf7c25be05e8e82ff65abcd9b45366b2300fc130313a950a8bbd5a6ba2a8ac625. 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/JPB451503674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488118cc7b2da56796b7ca660371019a9152aeecc34de12c82fa6dc97b250797. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPB451603982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d484e0047be98be669581636b0ac05440fb733de38c5ccb25f02f08ee792f0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPB451704262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6619af20f61123d76994773baad908a6d971c4e2df294fae34752ba4454c90f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPB451704264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a0fc1fb0ac8b2a1ea370fac0dac6285bdd3b6306d720b95260531b6b702950. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/JPB451704267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0654b0a01f62b4121dd5216ce181e950c51df0c00288833b06ce960633af1e9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPB451704268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaf2f005c2a8b89fc79269b4e1147266f1369704f7a491e2bc34b0cc4fab359. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPB451704271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a479260d445f1b75d61ecd0e0ee8914f9305aa6c136a1db721874f77cde7a5. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPU901803009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e2ebc088ece32378804745291e314cc1300ee3edaa5d8fae0f8aab2c6993cb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPU901803010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc487d6748410849203378d7ecf5c433583693876c0691a98aea7c3409ad4893d. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/JPU901803011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129434e9016e22046289a38eda7a0e2105bb1bb471f4741da5a14cbec8d45fe6. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPU901803012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d825091361289facfd2c8e2cad362ad22bafc00b3e93e67bbf47da1d642c53. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPU901803015.
ベートーヴェンのホワイトノイズ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ec141c07e139f68c1864e1626d8a974e7b25d17a6b96ebf448b9abba88885c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/JPU901901296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd49dc7d097e9d190180070bddeb6f020df87029eaab58912bd4a62308ce9143. 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/JPU901902563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeacac3c586482fa594338de86acd87cd406028907d05c66018469e5b3733ce2. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPU902002230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4d0d6b2d709f9eca0d020b05c621975e6ad864344a29c4a600151c32fc710f. 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/JPU902002688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d38bd306f058d040ac4e7725fc2080207dff6e632fd895b25494a142db91b9d. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/JPU902101727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad657cf3c0d9023bd2b230ea8e7d4ac66493b6126d5bb9ae06b51e6901c72432. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPU902101994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e84c8573755340f8d37d3184ef01e7bbde92a9a6ab0000f8a99a931346e599. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPU902200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3006dafa01e766632049f9a88c1aaab02fd3c21e68a73c09f453d295158e97. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPU902200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6827910a923311af6d968ad9a2fb6130e384d617c7e17431fcc35862ef7896f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPU902101992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bda4579c5c92d6e3f65d50a5810e9ce058f8b71d7396c104e400b9e73231900. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/JPU902200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3962b37967698fccc572a1c5337f99f2c3aeb9524324b518cae67c9cff9d4b41. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPU902000343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac89228405621de2a3cbcb964bd0ada385cdd3db67c9f94a8c24ed6aead6fe2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPU902200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70157f7d8407578864eae49b6572dd7185a1f688cb7d8b80b0115772a7ae3659. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/JPU902202132.