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 0xd9bfa566d9a68af46328d83a64714796a5ee1480ba0f67545363b61988519176. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8597010d-ab1c-404e-a082-2f3330e788cf.json and https://artists.proofprofile.net/proofs/artist/8597010d-ab1c-404e-a082-2f3330e788cf.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 0x3bf071297cb69ca39205374c4bb9dba06e62e703adec2b18e6192b0d9d60842c. 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/QZMHL2425103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fb68eb0ae06dfee8c5385842711a04e9436dfda28a8e09214d87dba3acbbe4. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZS672490664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445825887bc640cc1e81bcf2a3ca97fb19f2f8d0db0f2630acd8efd497d21a82. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZMHN2499792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a7af3513e4f8191301a8dd440acf37b7afebdbcb1b6a43f84bbd34f058ab4f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZMHN2445669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e2c749cae798e1acbb96e156f5aa8ad734452c366c605413bf4113d7cf0443. 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/QZMHK2454719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fc4c3d7ebcf4a5fc233f5fddab5bb98bb95e07e69ea32104c5800576c1668e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:59:12Z), 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/QM42K2458238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef08fa532de2279c5da7c0b9f6dca22a5e4fbc09a98c2dbfce17fd1057a57fe. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:29Z), 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/QZS642468929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bcf1200a51f207d32258ae72ebc28fa2ab6a4baa6b755d16f423d2d0733f1e. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZS642466235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162fc3c9644efb187f943b1930f2766e4c6bbf91356ce33720ff34324f822911. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:11:08Z), 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/QZS662468008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2a1f90e33e8983c64e6ca6d12240a9f20fcd8a8e2199e1879d7854918dc805. 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/QZS632400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949fcb424ed14a94533eb9eb1f88270a67948403bc3f9c95fbe58486cd60691e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:17Z), 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/QZS642445273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087c24a0d54347be4ee1e55147074b7033533190b903038043d48b26e8ab05aa. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:44:09Z), 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/QZS672436571.