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 0x3f88dffef3c06b24e3dce8c29dc386f84d1982993d1b4df92af8a97afa2192cd. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db48d2f9-073a-482e-8b19-5247deecf0db.json and https://artists.proofprofile.net/proofs/artist/db48d2f9-073a-482e-8b19-5247deecf0db.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 0x08148dc1f62d6eccb8679f92bc72ebd6c3b5e2559b02b189a4d77f47f5ffa15a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ42309697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0415555a6c02b20d7fbfb8077c5fb4554a4cd7c2a689fa43d53fc6ba87cf94c. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:50Z), 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/QZFZ42309698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67776be0cc20925b14747e29f9546418f6e485d8b168838fab7e1942a8fd2267. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:29Z), 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/QZFZ42309701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f656fcb92e57917ff1109dc4f1b1eeaa642707809d3fc2454c06ce4725c8c0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ42309702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896dfc2b626c713b96d7435165a2afab51a6e818e8b00b637b91b07687f8fc3b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ42309704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb90c4b76cbb0ccf675eb1d7b448d8acac0dac0324f60982aa8250b29e9fa8d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZFZ42309705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e33108c52f82388dde4bd335afef3df14087e95272f8d3cd2e7384a715cd71. 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/QZFZ32394920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f40a8b83388c01a11dbc703d1c2c26f2132ac7aa26b4c03ba69d467eb728218. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFZ32388508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fde7034795d3248382fa44b8618e37af0e91fd51179347bdbd8670a43ff3c7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZFZ32388511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf86f1eeb78f04d462378febb5a1ebb4155b2c38cc7b2d1adf1751c2fdd2079. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZFZ32388512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0643409efc947cbb70420f3e51b54382a0a8789994ca8859414e307aeedb91e5. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZFZ32388515.