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 0x99219cd443dd463b35a70259e85345a3f2536b328c74ce5b75cf26f64d1b41e3. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0ea1c88-bcca-4f80-a817-0cd201024d52.json and https://artists.proofprofile.net/proofs/artist/c0ea1c88-bcca-4f80-a817-0cd201024d52.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 0x775ba258c38f1f1d747e79ccade0865634f39a0a6cc143817e8a4b004484486d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX53U2389300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c902a6ca65abb3face54289f9297e3a1c6b5b0aa2ce02c92e57f0f4617677c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZTB72444863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c4c24579972ab9da0bdaa60615ed205b901204bf217eb5364b20a6ac3d0831. 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/GB8KE2415436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e85f69fcfe88df18d19b74d817773779a5c524acb13f03f425672cac83d9171. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZNWR2437885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9fe110cd52b0964720e4d0cba3f17603a569aba284148f51ec3febf2254e22. 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/QZK6J2324280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62af39ef615e283ad0ac958430041db81c93fe2a41884ea7ea951e55b85af84d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GB8KE2206338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468b7d7f2c07e396c19d4f079e99a11b968da58c8ea89082f18035c597f88937. 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/QZRP52115892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4998edde5a58eaf4b54b52c35ce2c647f14af149f85891d455f8e5b20951738. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZK6J2174433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4a0282ad8fa230593c2e3505399a735c11f96801182967119135e4eee4467e. 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/QZES62198416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fac03379324f431c07ac8e118d3b26dbf22315108476100f9362959a81110dc. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAFC2089974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd555033b56e1dd6016131fdf34c74126f70e24ae7dfb62ba19c551f9d32084. 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/QZHNA1953168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6967c6d82fd04e1b3cf8af469d26c5b2a227fb1754cf385bbf32705e255f823d. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEMS42104039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e23c2cefe15df63206d71b4774808eaf05b9b35bc3e420001bb734683393be6. 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/DEMS42104040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79daecf66c0f456f4f547999910a1b6c73d9297208776fa305237ec17da9ef0. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEMS42104043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1a9d968de0e25f2a3fe717caf7cac084a31c6d66e0a82fc5ad49f71e29aebf. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEMS42104046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cfad7621b61e7d2d8155f75106098fbc0042da31152cb55d3fa913556ad339. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEMS42104049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84375f0e47257fe3cd7ad9cf3c3c0349d0ed443ea05a0d8dce8646a6fe3ee49. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCAEN1943172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71e44c566dfa4d2186dd4d81d821371a0c8bbad6d7edc07a1041a6f19ddb5fd. 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/TCAEN1943189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4e884e29d83031aceb9edd5949d044c4dd3412fb8de73788670eb589f06604. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TCAEN1943190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd40ff9d5ed2485b0e9aabb61565a84c0d42bb3b2491e3f786465683e0169dfc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAEN1943191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d01974264dd906b621eb93a0ad59c141b35bb31304330a353312d497ba5521. 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/TCAEN1943196.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad91e6ff858314508e5fc8d57c1dada7b0cd2074f8e712a089024c7be13bbbaf. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZQ882402841.