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 0x7d738a69af061a9034e8510aa289deb4284669d78da0079b5ea2a601dc137ef9. 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/9baaf49d-2dc3-4e02-aa5c-a055bc0524b7.json and https://artists.proofprofile.net/proofs/artist/9baaf49d-2dc3-4e02-aa5c-a055bc0524b7.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 0xa721a88cc11b8579a7d26f9d4aeda1a333f8c01faa1cecace492f8e3289d0c27. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2110149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5335a7fbd1b9912ca7118a8363e214aa22d678e4336ad4e924f4f88a0951464. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2110086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde72644b911f8e34d5f20f9bc03d9e1359eb6d8e902d3f54128e1270461dff12. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB2LD2010022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d25c056135bc53c16c0409363c3be43d6f7d202f8080fd16d66f76126c937c. 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/CA5KR2266221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe880f88bceb6a10c369e5c6c076a34a5944f8c60721ce267f568f565809cfb3e. 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/QZNWR2056936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920c6a631d4663e60ea2841e4f7a3122c798af1103a62eaac2029627a89a46f5. 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/USCGJ2097017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061e63571cb1351024b260817208f3d090a7e070158fa8583d85fce758570cb0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2325931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf435eaa04fa66c47b65a445299f32ffd8d86a127f9f78c6182df5db7180b78. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBEWA2303725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58304938fd99649eab417123ef6b5faa594c50f0444ddd621aa53f7609a312e7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IT2GN2300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ee2aaf6bf30f71be2b8251a8f88852f5c4426fdb146bd0b240b6751ac3e031. 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/QZPLR2112523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf308264593183fd2e361a837d381342697daf0c0bb1d101ec1a298ffd645bfe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU6188054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b7bc9875eee6cb11a72aecd0abb3b02940a8d21e727cba3832176a88dee232. 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/QZHN51924165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0960a342aa07107951126804f5dacf2ba2ef2535a6f0f1d8f33256245edd94df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWU2139812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366782b80415ae02e8b9a93c93d0d06be3ec6f425bf5beb90d1688c950cb59ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IT2GN2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f080b1cfc734ec610f9c09d5b0f7e70ed6f6af706782150bb44d47ff7dd844. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES82024610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5d079d18aedd460bbe54b1c7304f336f982d0d9d55248607c6bcfd0b6db62b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN51900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc76d8ec529180bea4b75afa02fe0282e8433af1fbc039fed24be75976ccd715. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU1981928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410c1beb4e59dff20397be13e5eab336453cb9cf19797ab905dc0c9fbfb6c81c. 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/GBKQU1981930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f7f6f95d62a8b77e34ef4abcc552b0e34bd14c69e020d3d829681faf397039. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBKQU1981929.
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 0xd6283dea571eab3c1092ec7251c577e3074f4ae7ddc93387a14aa3132e01051f. 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/QZDA51864689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11e2813c1bdbf187e05b47628d3b8d470cf8de969f3cff2f1bd06bab6ddee16. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBUM92300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e1eb2ec65c3a0c541c5fddf6108174beb6a773869a2eaef1075a2925d4268e. 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/QZFYZ1939787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45622f802c9860d46f5a0d2ae4849ef4e8d39723ef89aba980b2bc7cc3cec072. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2266315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f724dc5a9a83933d35b2b344acc30506aeba56ff5e5254d9e0442dd2a9468ba. 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/GB2LD2110402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b26a4ad6d8e689b06a2e5cb7df568ba2c2c7b2e5633b9432351d6dd9937f38. 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/USHM22212726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061e63571cb1351024b260817208f3d090a7e070158fa8583d85fce758570cb0. 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/CA5KR2325931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f51cd80b94986658758ccbf16156cf27d7148994f85227f29264077bb4ddfe1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM91886180.