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 0x602510b6facc2f5669aea8407b61b65435d94c552677fac60ed935bd4f94b6c7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9d89f5b-7f72-450c-8b39-0098e9421e9e.json and https://artists.proofprofile.net/proofs/artist/d9d89f5b-7f72-450c-8b39-0098e9421e9e.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 0x7acd1f6cc7c3e1361c3fa1764e56a3e2eb2add6b3826c0a24260897c2c226895. 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/QZNWZ2045437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fe999ca01e1ae32595a27de65e50ea8bf7c5b43785d12bee4dc0fd51c5eedf. 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/QZHN81923333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2170194b5f65a5211d133e939198854a5be4ae6c533700e391a67f7eb52b509f. 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/QZHN81923334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41996345fd82b9b39dae6735f92322a5413e0554ba4dae1f951fab93cb9c9468. 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/QZDA62391601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66495bf89ea6460f1374a2e15726a90f569482d4e49a76f8d3a0c136d743a35b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWZ2287883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e321a06cd0ca355c621409dfb21cc350dc4c4245cb799032a77e156b0899ba. 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/QZRP42143334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7f44144917c7428aa3844c151b923505290ac81ba9fa8552ea852a08bd5750. 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/QZES82114363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f13960eb0352a6d47db4b5a46b671cf2b20fa2d79500a7c9ec0dc843d10206. 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/QZHN62052692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb08d27cab045cb388c2d45de1ddb4d17e1feabbb6cd2f36f0a9cb13a792ca0. 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/QZFZ22087953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9069948e5ec13ef0e98956cc993763879a3007ce2f8baadbb4ed7b7d395973b0. 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/QZHNC1964479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11825d2a772e02acce598f8cf261290237b28fac8ebeb962ef0799aecf75127. 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/QZHNA1914405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02946b14f4cce301ec6e5f97daefaac2a27e96d3ad395a1e3b5d22d0ffe5e82. 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/QZHN81937934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278fff72c854e27f832dda995054aa1e02687077fa42ca1911e02d824aa07563. 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/QZHN81959372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38edb1bb9f39811715216a5c09de41a92dde0c929d9f8f2d3c30f42e2bfc7487. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN81959373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedb5d80d98c56c24b9cef7a0747e7b48b71e8116bf13d62725593b8300b5d80. 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/QZHN81959375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa301d18299ecec50dff325afa85b66b0ee91c1c56206933015d3943de1275e68. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHN81959376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6354c353d5f2e9b838af5ef1804dba2cef2ae2e18ff659c198d2deea3cf78e3f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN81923647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38edb1bb9f39811715216a5c09de41a92dde0c929d9f8f2d3c30f42e2bfc7487. 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/QZHN81959373.