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 0xfe86af78920dfdc60d16d4e44f4aed1bd3c23eeddb93b270e045cab0ab6e76e9. 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/83bd311a-b3c0-442b-ace7-8993b4456149.json and https://artists.proofprofile.net/proofs/artist/83bd311a-b3c0-442b-ace7-8993b4456149.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 0x4a8dc2b2aed395f32aba67ecd015dea681277ac4dfbeabc447b0f516822520fe. 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/DGA072288862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef70da86b3d429b512876d2cd8270ff16a2b7e2546bce9b7ed396d416717360. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA072243428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6045ff39a8e9b29dde3f7220765d035efd52dbd116176d497431f05ab0ac7d44. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S2353898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ca9fb8b9dfc794bfa810a3e3deeb880371e1e44879cda7b7c87ab056dffb69. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR2X42345477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0679c8821bc2eee1f59c597e8b1c22649df6476a1869a0e579ed9451deb38f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FR59R2358968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3757e3f92d75943d3ade75649eae6eca1752b6b14172dfd11a85f92f883fb53. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR59R2358976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562f2ff9dad8214a678ff268b5b22355b55de586c4c12376d1ec13199e53a71b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR59R2358986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2c7f6040d8235b408ea6bf440e8a071baf4c37b1f493dc91dd9885c55c1541. 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/FR59R2341786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1033130d047a911a7ac2e25f988187cf10dfed048c9aa68e691db74da35607. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2341787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bea39218953df6f79d3a862a4438ceb153d4c1af875a594ceafaaa94b07699a. 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/FR59R2341788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7843df55d2a5324896c13ddabcd192df74c765d7992d528f48f7aaadff9af38b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:10Z), 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/FRX202308688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799995b75e7cd3280bc9a2b7a6df1951926c8dc72a4ddaa7cf9816369ea8509b. 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/FRX282383354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8dc2b2aed395f32aba67ecd015dea681277ac4dfbeabc447b0f516822520fe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA072288862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aebfbd05af441c8995c09a94216a4f8d31e00ad07c8ed168b2d03ef9da0742. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:01:15Z), 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/FRX282383355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeeddeaedc919b477153da352e2516217d01ebf19290685ba1d08f7fd90f1583. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FRX282383356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d38204d3df7cccaab12bdc1df783f49751d911a24c2688637281ddafe0e80d2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:36Z), 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/FRX282383358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850d17b816e5d7a078f1f05f18dd5ec074ac4841db4d976e1b105eb7f4248238. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX282383360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f5aae95f10bf6e71561940579e08aa05c40dba240d8b5ad1716217343f128. 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/DGA052368569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19a92ab45a4effa334815ce5d10a0e5ff80f798eaba9c8b9119311ca9e88dca. 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/DGA062312032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4743a1639ee3dc58442e4fb486d021c98e8514ed75bcc52118b37b9c38781d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA082314758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756bde150a03624074fb5e023899ca1e033553e9e49c3bc7b51542efb7d33738. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DGA0L2349730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb4184e4fbdec33d569b2fbaa113bf0b53034efa27e701d773356c27c45c3ce. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FRX282422188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bec76c39516dd99a935d4b358461a43e5cb50d5231226fa5d0eabfd2688b5d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FRX872492065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7accfe7029d6a5145691128c236c14287447ece0cf0be40e5ea8ffaad243bb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0P2438569.