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 0x8511028a1921c69f074b8c3211fb506f49e9d93de30f81adca6f1db3e74051f9. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f98fe395-785f-4fec-88d4-07445cf08f8a.json and https://artists.proofprofile.net/proofs/artist/f98fe395-785f-4fec-88d4-07445cf08f8a.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 0x91fed31b4e0bd994d5c75bed76c1d89de894f5fb3e5a018489241eac13d19f83. 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/QT65X2533781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf782360aabe1c7f03aae8686d4da4349970d612e6eaf3badfb80ed2143b1c4e7. 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/QT65X2533810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de7da85d8e32f3df33a284632ed691ae82b5c1dfddcd0e1fcf77b465f9e4fe7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT65X2533844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37204d34256a45e038dd8f6620ed2bab1121b9d13a06d6b45cca87748fa7af9c. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:59Z), 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/QT65X2533869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2086aede055787a816d222d1abf4db4f9eb37f62ba23f4018c9d3e79dd136fe6. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QT65X2533890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505ae2ad955218cc1e0cad6fe45693edd1f72e670ed97b91f967db6e11d2411c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT65X2533910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc2bebfd393bb6d267ae33c2ac6fe825f03b0ecce770fffa2d7e2185744dae5. 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/QT65X2533923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe93a904d413049d83dda76fbac828a696098cb2f94943de334215f90cd2c2a. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QT65X2533934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2901f532f0b558401f62be55b5f2c3a4dfae4bb630f995aab56fca394ac79df. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:30:17Z), 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/QT65X2533940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275b87103b9b701d6fb3ce48777257b0b777f72d97af3488f320fdedff55eacc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:28:19Z), 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/QT65X2533943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e759a1d6be36c83543486fdb451ef4b94ff2a190b2c07a001fcf94dced23a12. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:04Z), 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/QT65X2533950.