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 0x6f8175981c8d473d6c3a1a98fe83ec893958b6563fbeee025b6033843ce9ece8. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43d6a94a-3da4-4b8d-a6bf-1aec5d7225a5.json and https://artists.proofprofile.net/proofs/artist/43d6a94a-3da4-4b8d-a6bf-1aec5d7225a5.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 0xbfc9addfec80953690a0aa843621f346851756e0789270c877e922e91f2ef81e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2493318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eed099e0418a9c2a7726624fbbcc020a962b79c2c200cb5d967b06d9df9a48c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2493275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a7d6feabbf4864eda18274f25448411617acbbeb3cc773dacc8ea0ed783071. 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/GBLFP2493572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a492f43d62b87ef9c201deedc3f2f4901e48ded654d9d2f3fabfa2ce6f545a3. 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/GX3Q92471200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092803dfd4ae47a1c69d0cb6f9806d873e219ca1b65448730c3b96b0a0a7cdb8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKXN22403504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13de88611005313ce44d1fcdeae616090dfc478153abb15893c57cd3e5e63b2. 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/UKXN22427801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110a92c10f1f021af15fd7afb318825fe23e4ab641ca4d5180553866b729fcb9. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/UKXN22451792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2484d54571a0f425ddd4cb4e6d9dd75372df08931380ec70698be9ed131c0eb. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/UKXN22493375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f85913e7b38834b777b9db03026132e8f1010435662fe395651239a3c9d611. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBMA22443759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e5a8ab970c51073900820f802a4904abf96e8a2a4f7f1dff3806037bf6490c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBMA22475190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d3e294e82b857c0bc3a34ea5068649a93575b3921ccf14b8d642c5b9f987da. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GBMA22351544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02dcee2e52946b3ae1f38d52b2ce35be27593ccc621bd8d5989eaf6de78cea3. 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/GBMA22365165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5967d60bccdd4dc2caf7d524b0021515aa4bc25431d1f2a85ead9cbfe110ed11. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GBMA22368521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d6619dc722115ecd62f533a68e261080a164bf9267274793a7171e8f7e9e11. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBMA22368332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aadef6c14b8b6ddbaa8031d19240005487be82355a5c7549e8b594ec8f32cc0. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GBMA22368500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e1aa8ee09216c97191b4f0dbcfd6fd0697a205e1920bd9dff5735c711d5d20. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBMA22395958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb679d1b721dc835a218961a8545c7925461d73f52cace2e487dd21447bc09b1e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX53U2416367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348122c29d1d14c69e61c631679486d7bad73047e9aed6d86f2c877ca22717dd. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/GXF9Q2400840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde853d89203730ff4d900454bfe25af6292e54555103ed93313ddde7c33134f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXF9Q2540682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe255bb95acd0706ecf324d62ba709a9f6a9eaeda053fec17ac77f37e0f44e6da. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXH2J2526075.