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 0x104e3afe8d474d4ab8051ad3178652f1e0ac78608a7187f7a732608b653076d6. 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/7d4b6a5b-92fc-4ce7-957d-7617b54939c6.json and https://artists.proofprofile.net/proofs/artist/7d4b6a5b-92fc-4ce7-957d-7617b54939c6.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 0x114d487c4963e85512594d5064d5ae20c8427b21f0d41a16d5ab882e2e22be00. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZFZ72008777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a67f38b6cfdf1bf5df1b1f1359dc5060df5cefa4f6ed793098bdf1992efc3d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEP2093445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2eacabd6951e8de65822ad34a28ac5d3d6485163036e93c3e9168723c98e16. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEP2093448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f847cb478ddfa92b4aa86f4e3aeeecd12ce36890adfd6ba280a2b3142bff6b1. 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/GBKQU2221623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f226b29f98b0796c113938ce77322988b58ae6b7fa1e697c1db5627e80507e9. 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/FRDX62204330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f671ca8c6fee69c069a959f76081129d4f7b5bf59475ec05698c6d0f82ff95. 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/FRDX62206260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8d0b11cf32e43c73aff5ad9046a7588efbcde5a025da3fd84e33d304e375de. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLCK42235070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a36d096c7dcc3fea4d3e0ffa49e66b8e8daa5b322ad7299e615df8f240c7e1d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GX5MX2313242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445060d5a06dc11f2655c9d24689d6bb3a2b1bc3808281ad6dcc1c3afa2a979a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRDX62308520.
Rave Against The Machine (Tout Casser Remix Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871559f1b52168bd87ea3d3e5625f2de826cf1e8627198602c62d04e00871ed2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN32446085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51981b0a2c9a55f2621ededebef358ad84f39312e07fe0695cbf39b636b4cbf5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBLV62404198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be5fe27f2a9e54310851b66ac1e60607b78f3d763feac59bcfd43277dc096b2. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FRDX62409100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc629ca7a9b3d6847110d3a919fc0d2ebf74133487cb9f865d0325f5c6ffad382. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRDX62409110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed93fc160c98734eea7ac6ab4bfa0af3506ab4bc0d2bd6d330bb85d82bde1346. 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/QZH5E2415790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36a298b0cceb783fc3d470cd1af992eb387164ca0700261160b1e05417cb17b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FRDX62409120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457ab9e694a00da5284eb370bb561d179a6e6a343760a36bafd123300606d428. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB8KE2050519.