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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4732a849c95c05a54ec5dd9167a2ab0e1ffe59d7933dfff8a90928327e67a7. 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/c8d38a02-ab6a-486a-a953-ecda0a36429a.json and https://artists.proofprofile.net/proofs/artist/c8d38a02-ab6a-486a-a953-ecda0a36429a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081c8a99ba41261dd5eaf771aa5d0195797bb69af0ce6a1a2d5b742345b05ab1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6P2432755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0858e25aa460c88bf5323adb5d8eaf84a79713453d18577b80d2904c4584801. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US83Z2490132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6012f96cb44a8711ff8465989ef32712ccd726c1637f18212a12a406439483. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2490133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73ba55158235c834d209b21299c2a8fa0ba1b48ceec3e35bb0468d8162780e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2490134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc8b1b7078462ef0c2fc4aeec32dce47034970b62b4a921a7f7d598f5068575. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US83Z2490135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63668703df9fea50692a4fe177070c39c9a466243968f4402ea58af6422d4520. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBA2467626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863b95f8ceaeb1d7a83b82466fe60968afa3dded2dc5625d3505d7123133ab30. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US83Z2498123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dd99c120a70c4b801592dfbf930a9c937dbd9b0841b3625f8c252a19ab08b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB82442831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119b2917c13e36d1bd5b331fdbeccc951366e2bd5954c4720ed9120508d137c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US83Z2496754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef38533642c226e6f5396e1d509206ff3eda98d36476ad01641f6dad63e4fb4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB32412019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e9c00673d878dd19cbd4d20978a3c21bedfcfdc8b26a3d2d1c14a986a17f0a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB32412020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a31fc1bcdad9fd4ba516b6b70354ffefc1158b6ca381cfa16be5980a69cded6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB22472142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eafe6642c6aeb8ce86ad41b2cfb63c1ce72db2492f102508d358d5e0d3bc4e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB22472143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc18248966247f38161dc7289544348bd91a56bd31fc53a64c07cf5c5104e27. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAU2459253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0fa4d5900ac37459f57bd83148fd60ba2d5e95f004c3269cff931bce86fac7. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTAU2459254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfcf876668f94ea3ce8932c12a344449a435b4104d5e2f43541036c0b21286d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZTAU2459255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb171183adb27c04aa1696ed2e5d1669ccd08212c3a2b0cc709c8b957fca2e171. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAU2459256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecd59c5f4e5d66230b608527d26527a9698c60af6a78affdb06448024f0a816. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2488486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e113e1cbc1e8d296b4d5cdc0b4ff0bb0029cc8380faffaecbce2ad48e4b952. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US83Z2488487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762f32f0cba3b5cba42cf5480dafaff9f6e4ec3a729801e8e196ad7971d3f482. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2488488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853e86615cdd3fbc44188772676919c5c4fb618dcde566e6667e84e49cbdd783. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWS2442861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e0503b9579c6761cc8d36ed7b811940d454d17fc3a01f660954f361e31104e. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZMEM2484188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb32f05dc7d09c1885de414c892ea8a47214620ea073a80ace6a744db97ba0d8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZK6M2497309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7aa5a107e24d690a28a6e77903364b2a75bc015fa86104c23d2ff2057134ab. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/US83Z2495075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6425ff00428110edb14cb759e9f5d40da40ebd53e4eec816fbee36ae259f5a94. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z2495084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a90046dccf066357831289149366fae835896c9f8f4c54e332ce0fe7eaf1dd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2495090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de220dd388bbb3fcda397181498616f3fe09dd93816e81f8f6ba6e9b1e1f3ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNB2449687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3ac98dec22e2b05115d617468ba2470f61812befdca8460e382b59a654ebbc. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZMEM2451813.