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 0x01a4ff1512855bd6e1f23c0934e458380bb6a2502ba35a9b868dba9f89d3c83b. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d46284a0-ced6-4179-81bb-dfcf9dee15ef.json and https://artists.proofprofile.net/proofs/artist/d46284a0-ced6-4179-81bb-dfcf9dee15ef.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 0x565d0a35e4da069d7cc1be456a7de54a6487ca9c7ee9bd50af331d09dc61c9f5. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZNWX2215056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b64a89f0a85bc2f26c09576f1c60678d83446b261642aa4f1f3a16b3e75525. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNWX2276250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cc4a3c741020f4a53d214f192aa4808c25cd8d4b67329978112a4dea1b212c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFYX2371557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ae2a9d8ebe469f064ac3eb221798580db6a1247d13241f03087392afd41b6b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTB82340166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375ea9b07aa80345ee38e0d336bbcfeb80a153ea5469f2849b2ca3f803927bc6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6N2470305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bf39f55a56e3e24b9c20bb020eecfed19f44db4a1be09ebdbdf4eee21ba855. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNWT2409479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e35cb7ccc204b22e04210fc146b589bc56b6944058dc32a4ac4739e23db004f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QT3EZ2451447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4ebba58f048f2ae3b0ca9fc2b79eaa64e43e5f735b5630876aabcbdc5eb0bf. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:08:17Z), 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/QT3F62526021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1661e078fc935ba49809305b7d45c65f36f2f0d7ced9a95ff9e1694bf4449d9. 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/QT3F62526022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f94a8cc74cd3c53604bff36584148f1770902e34dfdab3165381c53bfb549d1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:45Z), 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/QT3F62526023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972a3bd93af63f35ff8112fd34b307aa43ad8e1d40dbfe4d60fc08749cc58c43. 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/QT3F62526024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c12b63f4fe328715cdfb0b3362e7d3701fe097f64d5a26f6e458c24061a8f3d. 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/QT3F62526025.