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 0x82de1a4f20fd6c811cb567d079377c5a3f264469fcd5411386dc24fa7ca06a9c. 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/076fc8a0-e0cf-4f56-b742-555b4c969016.json and https://artists.proofprofile.net/proofs/artist/076fc8a0-e0cf-4f56-b742-555b4c969016.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 0x092269d66e2731dc0e20ab63808755d646ac16887dec452e8960f0099e3281cf. 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/QZMZ92219326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262e1bf012af41a2eab62c46e8841399eda482a4eadf5da1bf939103bc91299d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZMZ92219327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b83b46888fdea59c2ec6b91ebba7af391eb2cd3841d66bdbcf3c5937f84ca0. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/RUA1D2114196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff28823bf4f5fc8b51941fe271b11df28bf779cbf30884fa6265875367087f8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:55:29Z), 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/QMDA72131427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c845dac3de4aa048bea64bc42e2df07fafcb4b0e1c2d6116b2a54bd3d03a984. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/RUA1D2347536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c35216c2c69505ba9f1b17589730c04510378fd9cc6a79e472c9ce894e3997. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA0R2326012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb69ef3c7f557ce0e49e4cda1f1168d8cab24e7fe26929793b806fecceee378. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:03:22Z), 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/DGA092467842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7080cdc9c602219d7a952703c18a44946d8fc2fd57c6ae9dca59014d8b669a. 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/DGA092467835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb69ef3c7f557ce0e49e4cda1f1168d8cab24e7fe26929793b806fecceee378. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DGA092467842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff5fece077a0a08a3f7a158182679a5ed3a2943a482aca4f48450c4859c31b7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA0R2403588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40553b428a5a1b68330350f94899fce1fc851d3245e6650b7cb0b2ef3c56f0c. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DGA0S2431424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5964371ea80bd75ec0e19a50b483f56bea56e7b9f85dc19bdfd3581f132729d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR10S2571404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675d0068611c5d5f87de35acdd1e3f43b017facc03237a0dcd74e11d0f6a3977. 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/QM4TW2574606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c88e0c4f5f17ff14edef8383d6107cfa49290fbbc0fa27db09d6ecee1825b4. 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/QM4TW2574608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed261d59615a6da3c836707001b0d9005aa273deb10375fb400c5b880fa8821. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QM4TW2574609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfa879f94926dda53df840273dda6e47eef57daabf02c69b7db021f58ea4af6. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QM4TW2574610.