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 0xf37d5e20ac31b447cebaa147192d31785ec295c9727a2e4649a99b709a633eea. 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/6d2d9504-cb8c-43ad-8e71-78b931294e01.json and https://artists.proofprofile.net/proofs/artist/6d2d9504-cb8c-43ad-8e71-78b931294e01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Everyday Everynight - Vintage Culture Remix
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 0x26bc54089ca70a223158859eda09cae665fe475d6e885ba030654053b9bebb9c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBLV61410067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f6c507ab397b2bb1b54884147df1fb7a20527384a69e94be967f836d91801a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBENT1330351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244a1d866c7ff6a528f1583861c7b8bce64cdfb920a102e8254ae5c57bba5334. 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/BX0BA2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48fae42009af7f63ced579ca5c6de557aeec0b620f0b969dc57ea6b85a6f6d9. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/BX0BA2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23fb0733bab981d77aa0157471b050d64903deec6f2ee7f1e6787c14b0a42da. 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/BCPCN2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbc4e3efac7ddf8e960dd041e025c77a5448fe0cfb2c653d4957f12d11ce94b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEW871704557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fa46ed36f8fe5ca1c0742edfca7cb6829340cab8564ebb7e5116158458f8aa. 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/BRRGE2007142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cbdac8244202aaef1adf8b512550f6497e6d551d62038d060247d0b16b00ac. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BX0BA2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2e9f60a6c4ca5bdabc1a58686157f13820a58d04484f7d388ebed66c71ad34. 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/BRRBU1600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3107b6e19d07ddbfd8885ea208456d51189eb64953c854a8919d054a8c1e5502. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/DEZ651705405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a8c154ebd7a11d90c13c4fd3509465d24df9b7e251c0b9c60b93f7de1680f. 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/DEZ651705415.