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 0x2af9c6ee4e0314f74be7cee6c16c36e674daf557f4c7dcd24f6e5bbd797eaf3a. 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/58c3d42c-d32a-48f1-90a3-e668849d4eba.json and https://artists.proofprofile.net/proofs/artist/58c3d42c-d32a-48f1-90a3-e668849d4eba.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 0xf9bb037f316fd0fdfb15cdb55a2635bb8c8c8749280a5ad69f0c72f10063877a. 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/USA2P2311593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc221b9182d4cbdb3dc627569500f03bb8571a457162e5a5c2ec2c92a106f3e49. 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/QZNWQ2384418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e96dbdbd6d75879d11edb97d2710d6fc3832b25523d0d95b9e3cd923090464. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USL4R2335343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c35c30677384af3e30e9e50d1a55b1c2dd8b698c3a7b7abd0346c2e869f48. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZS632363182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c361188aa69c0ca3002891cbf63ff381fe8a93e31c6cfde9a2752f72c06bf5. 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/USL4Q2347309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c7bcf02070cbe863de1a1a9a9d923ab495bef11569c7fb3ea35d42bfe523d1. 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/QZNJV2360752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41039b743f0df6f0e5967676f18bff00e838f3b1c5ea06e883870b365ef8f87. 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/QZ5AB2349398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191608c74318e394c8c6910bcd9759bb82780e8605f779491bd22f9bb969b232. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM6N22236905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a1dd762866fd43d703798d784efe3614a93999c523f7fbc9142284680c0152. 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/USA2P2215313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35b11bb9f8dade223909c9271a7ac22b69063e3291cdd194bffc931debb8edc. 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/NL5XG2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe37557b5fda26a18b2e0185845b1c47d948aa715433713b348eb36c8a7c1262. 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/NLRD52024531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9492c1aea25bedef4257228e7aa3a12acdff420c9c3fc318f47ee5331977792. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZZOPM2222079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe64c5dee6a2528538e524bb60314a002cad841f6d0f0c88d8b9be4c4de086b4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBKQU2207456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11930cb1b9fc5a9899fb56fae3565dd7fec850b73c0fe07dbbc2196da0dd5ac9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QMDA72137157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2e5a337498f60feacd3941e18448bbadf5dd099df31208dc0287341a47b495. 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/NLRD52024519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a4965c267ca62c1e7b1edbad3ba2acb8a4ba155700ec550e7970dcacb57278. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QMFMF2105363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7077e141ad3e62e92fe1a8257cd08b656316832aab6fc7ae7ea68643d2b3126e. 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/QZNJV2195665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0def82b0b8602a4bbcbc2beeef2ce7d6191acc13d82ead71a9bfa81dffd2ca. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLRD52018944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bf3849e691ec374a9b96575946dd73ba379eb2a7c9f7cc34fd067ee5fae84f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USDY42137119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28ca732ca7032ff42ddf6e7a6e19407114c6c9ccd498dc146ca5e0490dbe7d9. 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/NLRD52018925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ebb0863fc08896d815fed20059030845e605fb6d5fd1314cf303f4bcf6a508. 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/QM4TW2199542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284949a548dc55047be90ef714ad083fd21ad1651aeba6c2d82a145b1933cf20. 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/TCAFF2097092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44b3861b9b9c633796b0fee02a4633e797816707f8a5d552f8f7332ec35406d. 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/QZNJW2032159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea2c4ae5f92669d23686b6d6b8923e95934cceecb295f5986cad1140963c5e6. 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/QZGLM2020032.