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 0xfd6f579200fad73f74cf68ae85e7fbe4803e81131a8e68531492d6a503b45912. 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/0593205f-93ce-4abf-99ec-aed62e2b7369.json and https://artists.proofprofile.net/proofs/artist/0593205f-93ce-4abf-99ec-aed62e2b7369.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 0x547804754fd71dc56aa3b73f2c75c867cc8229475e2a25c3987b2d6e4544282d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZGLM2385601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123fd38f81b752e4dcb692f25337f2bf9a7af2cfc0e8aacbff4ead4619c99a3a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZGLM2385593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ba0b10efb582776e797b74c8c6b19f0da0969ba95e6cb35bd1563bbeba1608. 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/QZNJX2319742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18fc41a29bfa919bf5adbc433bf5f64df2e98c33ca0fb34a3fd456fc407b40e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJX2331794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0514979183598b33e63b59c5a27ffcc12983a2f8b0f6361d677ea43e22f75878. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZNJY2304341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46b0f85fcdaa2f4974c8a87dc45d23068062d0748e933fb4549084d948c1522. 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/QZNJY2306022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3032e7436035eb6591b2c3a2de78879ac23840129261d1ed265cba0d4fbab28. 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/QZNJX2484865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a944a12a28500ecbbf82dbaf6777ae2965b3e02b8affed9b85337be63e89ba. 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/QZNJY2488371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e7df0683cf590888cff6e8cf51c8228ca802d9147d82704aa9ca53365bed59. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZNJZ2405393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a69e830c96f527a837e62b937bd760aa4c023ea4447117d722744c65f621c89. 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/QZNJZ2430252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7fc5ce9e0edadf9097681c2f61a9c54bb39db23ebe7a289168ef237028055e. 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/QZNJZ2430241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc97d1b272ba8ac359f7c09e05e1769f3793aa0b266f4b0a6b2f225044c00c14. 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/QZNJZ2481383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cc6e521fb7b8cd76fe3eb80ca29bc2cefdba5ead691a2a8f897971ef7d2978. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZNJZ2481258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a0aed6a3c2d518afc7fac693aef993491159969acaa646137795a21baad255. 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/QZNJZ2481549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4399b0895881723c1e62dd2432b65d727bdf0b963404da2556de74e7d3ef98b2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZW9L2422929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195bf215f4881ba4cf348f815948c6e23948eb60b1eb73b1caee401c201f1486. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZW9L2423009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4280643e5ebe62f6ed90b93c00e458e5d28f50170170bc401dfaa5cff4897b78. 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/QZW9L2423025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05630778dde8c9077262dbf4fd9db81265edf84619c6b878de41f27a30353c51. 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/QZMZ92396487.