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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f07f7403139e838a211e113968b15acffdc90f88b64bea31a4be13a4d1afae9. 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/01931556-f929-4b4a-957e-a89709d31500.json and https://artists.proofprofile.net/proofs/artist/01931556-f929-4b4a-957e-a89709d31500.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e44fb0bb4ef90cc63e2d43ed5957ee2b19760e9fdc401b1da2b27ca2dce0e9. 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/NOG842304060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2ef7192d7fb9944ba90fb8462290a780d900282405d066428eb284dd24dd37. 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/AEA142301754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345db52de5591ecf05d93eb46b83bf05354a9decc68a39f90a13efdd38d69721. 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/AEA142301746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c54a52e0f5738bf2a96ca04494a497937900bbb1d06f39c7792bd10cc3c007d. 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/QZES82360488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb563eb5a27f9421f0d5d6bdc0b9d30f3792b5aaa5f9ed5c49736dc1a30b090c4. 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/QM6P42209051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6053d96dba94831aaa515092cd08fa7b0f0fc8b1a56a63d590ca138ef0c50025. 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/AEA142114646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2738d035c65fd120831f65703dcc3bc398f02c0ce8003e03f8f953c3cb4426a. 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/QZTAT2218890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0e3f10c208183c8a20cda7bf18b7a133b3afe3d4b83c9ddab56cb04dba42c8. 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/QZHNB2260289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0149d98badaeafae2e01c392559ef54ae15e2530cbfde0b94eca4f922184061. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZRP42147520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2774c6ff0712c932d6b06e5b6e8f4d965528b9af3519fe41fecc8230e63f28ff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEN2169381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc526fd8d30892e7a1a4b0ba16431a1eb1b9a56bcf087111a623d279781c7eb8. 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/QZMEN2169378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d30bd4196a62c829514e38601ef56cff5b473b65ce1b4e1921cd8b17c16418. 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/QZMEN2169377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0640d43b28d25a2bc3be347a3f0b6f882a06ef48c96362354bfb96b837689503. 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/QZHNB2262374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4406e3dbc69379566b4f19f6811b0aedd2255f26f0349a8d89efa24b3ca58ae. 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/QZFZ72246060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e0b64272d5a8b73d4597de313b1f9f1d13a2be9b1c06a1cfab113aed9bdb7b. 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/BHA012100003.