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 0x6b6eb7e4b1fce5975fb1ec119d13b9ff63a1777ea2b894b286c8dd0725041656. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e38f64cf-92c2-4d4e-9d39-8b8485ae0496.json and https://artists.proofprofile.net/proofs/artist/e38f64cf-92c2-4d4e-9d39-8b8485ae0496.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 0x43b540fd28c45ff57b17dc38edff67c7472ac13643a88bba758fb22c7fe04943. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:40:53Z), 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/TCADA1731970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3857b2abc1847449ba46579a42cd4051f7514ada4992c5947dbec9b3e28625ae. 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/TCADQ1868747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c739df7c65c0e73ec8762afe2871b50d14b742ac95036598dd6274df60c87e. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCADS1861463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85d3d612a3c51125818b6f8c3337c0ed16fe0b5a0b6f9f6335a621c10a5d0d9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAED1924036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8378a9a009afab986a6616e3bfebc362b25b2677a979cbb8a250a70cb10b7b2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:04:11Z), 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/TCAEW2030150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b47f9e315c1365393b11d55227677645e444224de64fde8c9aa26bd000b1a4. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:05:59Z), 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/TCAFK2125998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce357485fac9d36bd20fe2d3424be09b7389ab24f2cac4e4fd15b04749ef300. 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/TCAGB2239344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51efa6fe71ef29e716509dbff15cf253af92762084577ab9a187ca198613761. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGD2234795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdffa97b522d995f29c2cffc03b65730e05597df6ef124133ef28558979190dd. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCAHE2314995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf655efde4bdb0c144014f95dfd26b402976e94690e4852261fa3ddbbff100. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHP2346118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a14e3861445b79354c318157f4a24e6cf71de610b7d95440eeb31b3a80bd86. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAHP2366151.