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 0xe5bdfebfc6a874e17cab2fd317496b595a0a468284e990b3657c53232c2cec9d. 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/8c0e5bf3-8091-4e09-90fc-76a9499e8585.json and https://artists.proofprofile.net/proofs/artist/8c0e5bf3-8091-4e09-90fc-76a9499e8585.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 0x76d370dfc9936f5910f1729ab33f34772bf999f979498785e76840df009953d9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZAKB2008734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893064bd91df9a555931ec05ec93f774b3dd02b119a87c1df2013cd5ef8440bf. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:46Z), 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/QZAKB2124386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79be94d09479dce2653b2d312c0ae7ecaaefb3af63d8b5000e767c5179f8e742. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZAKB2134074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fc91c0152b391dba5a4254680fd49e395e11fd5a76379fe807b63c15a7854d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:02:59Z), 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/QZAKB2154992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe399a18b0c460937833b5fe68b51513641a65a460e397a2a000d35a1a0568054. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZAKB2154993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2709b13e85bf048a42c28b7cd1df21c441f16225b07daba6fcc52a82aef3a27. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:42:44Z), 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/QZAKB2290880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7b7c3d7c467a7fc4c56edf276f44b4d9aa6143cd4d7101d665aab63f5e780b. 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/QZAKB2320263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36e8e8d9f72d7ea90d483398e9b48215902abbfc7676a5c0ff46405790f0d10. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZAKB2369345.