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 0xc99b3a01a0a6bfec82de6781541a810791c2e97977217f83d93b5e03b1ac4442. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/364e3522-351d-43e8-9f26-8e74c46ba887.json and https://artists.proofprofile.net/proofs/artist/364e3522-351d-43e8-9f26-8e74c46ba887.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 0x7c1cf8e7ba3f5dbefc783378208afd4b8b6bfe552020d02e57b8519f211258ce. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMZ92427404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322d32e4c49df3956c6617c8892955de24cdc86e5bc1ece42226023a0d284b9f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMZ92427405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3770a309e8aa77cdc1f61fece6ad74d462f2ed84ca45f7f5729013296a674d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:11:30Z), 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/QZMZ92427406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a66a8d005755103bc7f32708358937d768d30ef89f10c4e3a8233feab2b28d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMZ92427411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112323d4a755f62cc0f294ab8f62a594429e2c885a0aba9e3b3b2694c55ce8ca. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92427412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25988ad89f9ab21104e9b4d920f6fe4723f0f9dfa7b61679a31a73f2e343aa9f. 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/QZMZ92427413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1136b88243f2e5b5f8fc37ec9644cfa666e3bdaa904d55ca71450bc4b886f9. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:38:41Z), 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/QZTVM2465422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e74a3ec685d9bf8e62dc544fb21e9528c6a5d74e0ee7d7b158f380b5364e543. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTVM2465424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f4b3133482280df3166051ed8c2dbd27a58531e7f0ebbb48ee3721bef7611e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:06:10Z), 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/QZTVM2465428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aadd5c22a45aa422454868034e40d515a3ebfb86b93ee89951a840565983353. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:47:40Z), 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/QZW9M2459192.