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 0x605040e729f81050cd23e009dc9b537c2acb7e561b5d3800e8c9501380c07d58. 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/27cf189a-dc2b-43eb-b3a4-20f6cecea6b1.json and https://artists.proofprofile.net/proofs/artist/27cf189a-dc2b-43eb-b3a4-20f6cecea6b1.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 0x7287d81f0ede897a992faf0c4cc97bdf56f9e144307645e6e4984cc05ebbc388. 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/QZDA71984545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169de49224102c8c5650bef48040e49ead607214aa34d725efbb82d892a23045. 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/USUYG1306400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5559e15e797c375649e0c0e0e7cbc6bfd81eff2032f69a79bd87b0325f0513. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/USUYG1311124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21af15f91a0e88f0bc31d345963b90700de259ee53cb0d5d56033aafc078665. 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/USUYG1320513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed30fa7a05b50aa9f20a6682d77ad831f243c94edac1e1edb4e16657cf04e9b8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USUYG1364223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b662cb948b22f85b18ded7ba09e75422c424ce59beeaf4195edf90b04dbe8a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USUYG1364227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fce72bf63e1fb45ac154159fd314eea9321090e3a5d5018bc7830b0239da92. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USUYG1364232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb310235a19247f76f1859f3c31723cd256323f18699f421fcb5201da1ab2a889. 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/QM24S2300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1fc06eaca8ecea51ae02dd4de1fa258e6f5dc9ed1903ad265a0f7cb2bfc38c. 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/QM24S2300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cb7b3aa86ac06888e55c9d1f784fb5b78abbfc3f2f5676ab4072fda10e56fc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QM24S2304821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff41c989dfeeaaf1945ec96c86f2e59da4579a6dc55ceab3d885d425b0263682. 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/QM24S2402314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb568e40041ff4ba00f0b205a74a11915f1854b58ff181378bfb74dfe9fa2e8f1. 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/QM24S2402313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdee81bfdc26f02bceddb55fb6888c39216d24324c2dafe06708d35aa2cd189. 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/QM24S2400854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb75727bad3a563dabc7969a97386b7abefb74a83c7da50249937dab597bdcb5. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QM24S2402308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3901b83daddef2597bf95abf6a2cad895ea72ef2d8fd3f32fc74074bf2dd20ff. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QM24S2406411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09211d9d38fc5f257e1bf6feab033d70c0ae0e1424126edf58d9eb5587adcafa. 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/QM24S2406770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6673fdc35ac456fcf62b3a5bbfb78b2f81786a236962e5311be496558b3a03b1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM24S2407428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b146673ff36507fd0f560176d11884a35c39e9628a3674159d79c89aade4d8. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QM24S2500985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b7fabb6d82df9b4f225e30d40c82c51105562195411c097a4b2c95809d5691. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QM24S2504511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbff3e2fb46f4eb0d75013c849713741e88b19660dfecb02dbc003ea47631daa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2203294.