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 0x537ab6e090811c217edc7453466ed3cdd1e699a4eb2343618a97ecd6a743f2fd. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31538cdc-5ba0-4606-bfb7-72d8007febb7.json and https://artists.proofprofile.net/proofs/artist/31538cdc-5ba0-4606-bfb7-72d8007febb7.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 0xe0a21a0eceec4ca10e62b4d6e8f61192b3003793d6a32ee7a9a862756358c20d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFH2015740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2969e4a8eec43448c7b71487e0b97641ecc3d2da5212966dc1350e2b6e2ec6ec. 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/TCAFH2015806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133b8629dff2c0ab0ad30e5c64363e35afab2cfe64875a75844316ff0b3adc2b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TCAFH2015827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355fb74656ccab28a91eccc1c8c3c2e08cb3ec873c8866af21c747978d3bb73c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFH2015848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045fede2747777adfea73479052069fe68d77e0a703e7b7462d61c9c5da1e5c7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAFH2015855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ff90d58d72a8825613d7765b6426304a25e9a719208312cf317fcd37970f32. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAFH2015869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa589f84668f78d514fe72532889d363a5c6aa34068fee49889f38385ed094395. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAFH2015877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df8e1c9e8e367e6dee61645eb31f4fcdd6e024f4de3459fe96ab899dbacd974. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCAFH2015926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8177f9604c8eda4588d81fc6c82df6a62911a886dec0a0609591a9db64ef7. 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/TCAFH2015969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e48d56ec3baf232440bd9ce3ab84cae7a6b507812f154007dd99d2b8a58af05. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAFH2015972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809c769a60dc83c333c68679cc8ad28bb70efb4a0fe5801cf4dab3eb10c33171. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:24:01Z), 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/TCAFH2015974.