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 0xc999b0dd42da7a4232e2c3cccc6350efc749485f162f46b9d70aeb8b1827d6ac. 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/420c719a-5bf8-403f-9e2e-87703a84cb48.json and https://artists.proofprofile.net/proofs/artist/420c719a-5bf8-403f-9e2e-87703a84cb48.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 0x73640ea66df970d4e1ce4b2f21e48848c5d2f3e4f309cd12dca22e04d1e8f7d7. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZS4B2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c542acb00d1d5f1b693f28a49918a68f11dbc976985a6613d88ba934405a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGJ2412524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf96e530a40019b73aea76e09466536860d3418a9998864f038d297cfb4697b. 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/USL4Q2407021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22b72fbdd29bfeb4f76da786303c8962cadb39eaf66d3f4bf892bb44b8bfbee. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USL4Q2407023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94b580633e1a439874e80f1d9619be3b72c83af4927995e80c18fbb1fc7ca32. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:07:32Z), 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/USHM22501366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70eeafe0fc0c2e93bbe4d025e03d550e2af04eb2c2fa693711d588bff7e3827. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/USDY42582209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6af66406df02d6d7a2ce2eedef1559d1704188fb0f3b61ea24c2656b7f3b273. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USHM22588607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf068e5777c61675f5fe6773eb41ca42367da8cbb8e24c8034b817735d80a6e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:03:31Z), 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/USHM22588608.