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 0x6397c9a91e842590d0ddfb8bfbb66859e5b5eeb309605f399644c03e9400d7de. 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/9744946b-6a07-4de1-96cb-cdaaaed0b4bd.json and https://artists.proofprofile.net/proofs/artist/9744946b-6a07-4de1-96cb-cdaaaed0b4bd.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 0x5ee8d391b4110c49f443028fcb0563bbe2cdef103af42302c3f772c9285e2886. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZMHL2443755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38ddac0c96be36b289b0c4137ed61cd9808623eb2750e712142392f13b73775. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZS632470866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97d58ca1a6228db2e31fa0810dd22c9631484d414c193c7ebc7b698669e5ea2. 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/QZS632479508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dc2d0461abaf9f418470f872713ee11a0dd6dad0e38952bc7a1c3fa9fc6c59. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:44Z), 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/QZMHM2484048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb206c9703c562c45d4d598e6085de561e9ae316d73e60c036ed09b37ed23207c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM42K2428341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dc199ec0357370d34dda049cb7a3b5887a90bc68765208f89936c988525d0e. 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/QZS672444540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe72df8cdf7c915e355c1d3e57f15cb402e3d7765ce9fc20b3537ecaf5f15a. 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/QZMHM2430292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186368d53eaed0cae14bcc75365cc9dd17af892130fb3bddc484752dae5e4a9f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMHL2401436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86dd27d18d975f65b72981d0bfe42374a23afa6adb554082593a82ff4908e90. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:24:38Z), 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/QZS662418442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2a62d871958443c83c9b64d2472ce922507f2bbb14caf6e6bec9b59e43019b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM42K2413085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8149ba03cd722adb37d555de2fc02d6b4c19a8b206455903377aa758264a8ef. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZS652468300.