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 0xc9344b8e92f1677189c41a573a137372945353df191d1283fa1594c439c2d71f. 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/42a5bc0d-240d-42d2-a140-411530a33824.json and https://artists.proofprofile.net/proofs/artist/42a5bc0d-240d-42d2-a140-411530a33824.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 0xe0479ef25dc89ea8ebfc00279cfdf7ce1197e46f4bb3710c896141817ceeb4ea. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFZ52112703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ffe0b87c7466e8a28bf812a3b398ad334d0fd10c411d6537a802a3f246f314. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZFZ52112706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d2759a83841bb1c71dd5053d1d65a9e23c78578d6ccfb4155ba2095b90ae4. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZFZ52112707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e6bb27077edc718cefdb89c7321e9e715419add85b20ca787a444dbbed44e3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN42115549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0796f61579848387fecaed3ac7e92666b5e0f5083a736435a624c0bdb73d5f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZFYY2225795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfbb396f747b795479cb92c32b421c31ee24d6511200ab8f795b5d50d5abd9f. 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/US7VG2205049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12070b40c6ba999a23c44e9db3dcee9ba782f1b9e3cac20970e804d0eaa9be59. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US7VG2205056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370b70d716cabff230775741b486192fc4296da7b4e3b0d35317c1456f6e3d1a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:38Z), 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/US7VG2205061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9969cccf8b2b7d667c66593791de00efa675215fd8ce535a5077d2a56c96a13c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:38Z), 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/QZES72325969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff179241981998732f94da0bb7b15cb0528ff13d29dc53b65d85ab6e926a9002. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES72325970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b1fdc8155a22c170ec71dd1189cac906bd37140cf610772ba32fbfaeab6661. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZES72325971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5506ec91cd9396606c4146c25acbf9a8d967ff393f91802189f4e5fedd51c2ad. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZES72325972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0107d83dec30bb453aa4c2486b03dfa8ab4d62a17c6e02a83ea0806625cd99. 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/QZES72325974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef33205c5b26b55cdaade8e2e3ea9db548dfe79ae6392825bdbafd45ba55da2e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:38:57Z), 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/QZES72325976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef8fa42ebb4b7a1663e363a9f89d88596930b68632a9112ce6baaa5016592a5. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZES72325977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cc8cb3fc9394fd9d530529571b902ab38f058809bbfa1216a913d76148e3c4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTB62448938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2818c37edb7632a277e054c906871003c4db1b39d1bd001edd8f366f118cce. 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/QZTB62448941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ccd39018b269d496a329a7b59a600b2126ea414e9767327f2572317b139533. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB62448942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d5108a2a9d2effc54190e6ac01990cce1fa664a42560020d8418e6bb5398ab. 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/QZTB62448944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344c785892060a0d57692900b09eb8d609c3c52f43c20ee671adcf7915a2a60d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZTB62448945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05daca0b939ad74eab6a4709d6db36a569ba3f5934568c79dd45e69381f650ee. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZWFK2586016.