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 0x1b8f666798c8a225d5e73ff71fb2dbd1b8b1fd7aadce75dd4329823409a874d1. 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/064657e9-7c0e-48f1-938d-e4deb10e0909.json and https://artists.proofprofile.net/proofs/artist/064657e9-7c0e-48f1-938d-e4deb10e0909.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 0x1af7fc621774e994cc61ce89e58ae06323e350f9322dbaebb9e784f34cbd4d6d. 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/GB2LD2210360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c27a3041219878a4522805d321aa2f78b83826d707ae399e897b4f5318875c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2410262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03795a7b2d4a280d91ec4a506453730f42c466fb0a5d2695f9fd6faa44ede486. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB2LD2410263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dc77c221fb2d214ce78c2451786fd386ae7134123ee425eff5866e18f620fe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6N22416553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36e10edd10601430060bc675eaa320ce5d2c2120c2adf3658558571507e3f15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N22416554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3467bab5224532a188f9692f97c84eab06a9152292c4a8e7e9c5f111bd0fa93f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6MZ2448645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6451c0a3ce170092b5fe8ca81097e744d387a87afff54bc303ea0ad6025345. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6N22416558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05316d8c36996104d5553b6963ce0f05f9bc15d0a2c0b9045f27000b839b10c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6MZ2448638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d93b8775136f1fb368bd62300d06c76cb02d60438b7c01221bbc8b77de79f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZQGC2400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efe9709ef02da1c736e0800222ef21577ebb8c2516e1dad95cc3853b8c6a924. 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/GB2LD2210038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dd022281de99af2b4f6242976c940563c63fe87466e8b887c5eb62382863ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2210425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae119d5e36e0d488d3ed141f057ad3d9daf25e7b1f70c2d121004bba1c7e2e. 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/GB2LD2210427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df88210308c93321d084481cd04e6f19b63daa623e7fe56ff9e9d995fd99661. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB2LD2320174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d7598f3104758338ebe039d74ac42d097084699520031ee53383f91adaab4e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GB2LD2320175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b24be0efcdb06eca56960a7bc4ab9d3269a029546fbb6bc1539d05c4662477. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2320176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc281846ed18b8107b6aca563dc597315ab65ecd648839bdf8e9320157f2e269. 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/GB2LD2320177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4cff01fb062c5bac0c92065c7998070d17e9c1dec2179d79ccef1814f8a49d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2320178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322406bb8ae24ef745e547e27fce1bf52e32232efaeada60ec31abcd0400fa70. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2320322.