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 0x4b28e1f5a8efb3cabd24efbedf2cc6319c41462a2f7c8b2e9d607a4b408f9614. 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/f19c478f-313d-4dd6-872b-dfa14545d754.json and https://artists.proofprofile.net/proofs/artist/f19c478f-313d-4dd6-872b-dfa14545d754.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 0x96bed881d63e16a1911064b5f2272b66ff58d6c7452f9919d07b204a2265f195. 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/PARP22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e1a80ec172e4e2fb4c6df3a88c7af958911e8b16cabde708d4e927ba76d9f6. 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/BK4DA2307007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f15ad0d0dd39374a695cfc89ea24dbb0bb199923f5c7d2a9bcaf6d0de19d292. 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/PACC22300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4407f93dcea7e4489323d927a018a4967231d2caa278f8a0a5a1387b856231. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PAGU22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48890619c9e9114e84ef2226a5d237c19bb3ffefee1a3acc25635bd7a9ed79fa. 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/PAGU22200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e4b8e604c7a03be7a0997790b8ed035f95a82933c31df114c90e1590c13333. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/PAGU22200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7adb2a06c00fe51913e181230b2cff9294150c6164063bad95ff697348c82e. 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/PAGU22200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ff35bedeee083d2feed2b989446649fe118c13b8b611601fa452cdc7a5311f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PAGU22200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78cc1513551d5db05807aabe082741e86e69de21ca803806295065965590125. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PAGU22200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e815df4cea0f0e5bdb84d76f2ad9f43d4de94996f0d6cfb55d3a779220e5f8f. 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/PAGU22200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383da5afc8b297125abd32e6a03c3d649a536cdd94f6d4bc46e108925a913ea0. 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/QZK6M2167593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b0b02fefd3a5a817b5ea35682cb408f1578a0d1ce33bbf67e8b39dde9267b1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DELJ81804612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f021611da70de6ee22f2b8550cc4d1484471ca8111b88404d3d02ec061d295. 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/QZPEW2591842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0f890e2a678095c80a8f5bacee2f560548e8c8d8d8aad0358dafe0474cdff7. 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/PANR22300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50de174d88081f6cc0bc191abb98445a8b5cc881e29e9db3a331e8a924fbec3. 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/GX53U2326557.