thumb|right|300px|A Cernunnos-type figure on the Gundestrup cauldron (plate A). He sits cross-legged, wielding a torc in one hand and a ram-horned serpent in the other. Cernunnos is a Celtic god whos
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 0xe6e3bceff21bbaddbf43b37b65c2c2c63a59868db017f84f72a7ceda277a8b4c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccde0215-7ae4-4031-a9c2-afff255f0ddb.json and https://artists.proofprofile.net/proofs/artist/ccde0215-7ae4-4031-a9c2-afff255f0ddb.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 0x2ed904adeb25183cc8cf58714bd299c391c41b5493980b56d8451f8a357c52da. 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/DEWG82300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3f734cc7a7cbf9dcc204de5faf9aa2aa2ae44c782dcaba20d2819d22350241. 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/DEWG82300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c26a10d0b570f2abbab38a589c03e9661b711c461ce4cfd3e20f74877c8f2e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEWG82300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce2cfd9ac5c53e386b861ede2a6ad89bc78a5591d71e788f6dad4bfbde3450e. 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/DEWG82300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23a2a2453df38a39d64af484d89170b02c009a996c30a48dafccc664a24703d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEWG82300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef19cf5b86cc9d982f407d2c65831b7408ae52ad6f77836fc8029f86aeea77e5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEWG82300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf1f3c7625b8efe845a78ad3dce713198048a484a57d476e8ceac923aa43936. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEWG82300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0490cbc5c3eaff3eee09dc2563bc21e357e82186a164527e5c110d4eb7e37113. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEWG82300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104c771cfc24b36f43c4883b61679fdf5c9dd5ba572079175930540807bfc01e. 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/DEWG82300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb503955e92f862039c51b9c4cd609e056e54338eecb711d67174e1b8a373856d. 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/DEWG82200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa088fbfe9351a32bd91c1c05ebe4699386246e3ae58d45ec7a7ba3359de4fb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEWG81800178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8683e48e40bf90c01d9456226298f84d3a68f1af0ee3c693c3ba8b0e9ae31b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEWG81800193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefff2346b2942eef00c0502d939b4d39aadfaf8c500b9a762f03cf95b3b7798f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEWG81800195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dde1e9a87f5c4e798f23e24271083cef4eb79fac9292daf544751e10f9f18a. 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/DEWG82100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d62075054390dc498b60bca080f305db796b46c4f97091abdbd9486af1117c. 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/DEWG82100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eff9de6632961706c1f9e4ad521a1ef4ef56065dfb7f387a9dfe7c1fd7e2922. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEWG82100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3fb241facf87baa293c70cd650ecc0532cb3f5c28af67c32508fac520885d1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEWG81800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf4ed34225f495a10c574748749a30bfc123682e6dbceb6bfbf9108667c9716. 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/DEWG81800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfff108911dff18356f29521c5d361004e90b8e3147cc5b4c3e29eb708d174a. 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/DEWG81800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41629dab14769b4cea703221bd767a63b9837f2bba007816a404f45ead4a5aa9. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/DEWG81800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f096a90e6582b740dda4ba4712f797c3a55ea41d93aa0321c8516099f5521af. 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/DEWG82200258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba513537ca0f6ca54bb309264feb0b7465e1536fb8f7d905e2d1c2f3ec86de2. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEWG81800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083dda1d52bbe0ca6972af10e50f6665a31c98da98cd51181f6c53ba409b8464. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEWG82000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc4d98e9a94c1c48852fdfeedd960717a0a3b395bf93eb73192ce85f92c6fa9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEWG82000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0a669309fd1350129ab5250e877c70954fb21cb130735d897988116bbea89e. 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/DEWG81900027.