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 0xed2ca2851212ad69a91dfbf9846da89f9882fa047031fd631ef2e236fe79a641. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b479493-0a09-4171-ae28-f47644ba3854.json and https://artists.proofprofile.net/proofs/artist/7b479493-0a09-4171-ae28-f47644ba3854.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 0x1fbe912034852a0e005b9c0b927086781b221d396fe00619d41ae99f4b318e9e. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/SEYOK1929458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1fc9499d0c133469847640560a017177b76124d357b11e081a09e26789b56f. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/SEYOK1929459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794e8254b8a472be03559a12e3cfcc40cc36746b1bb21fc6d6a6d636cf032261. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/SEYOK1929461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eb87a071b41afa39ec67d8f7fed41a11754d7e9ba511f735b9f5e6f963e82a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SEYOK1929462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49301a4e724a519b3919e667e3441df6e3994646af78d02132dc78dccafea584. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBMJG2209505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df6bb0ca3803bd4478daf2b1719267fc61ebd8ab83a211e8a127995b1f34b19. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:03:25Z), 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/GBMJG2209506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc776d1e4ccc504200e491089d50a1053f7331f3476b25d257af705aef995edc3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBMJG2209507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec757d8a573ba00233132bb8bb2c0c0302410575b0af8115a2810d1fc22362eb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNC2322893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95afbce73dadc3da5ab5773680fddbe5d1baec369a35a825072a6817291bdf2b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:12Z), 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/QZHNC2322894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7116624b9f856f2dc7eea1f802473f6b0b29b35bb71116ea659a50509705abb0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:24:58Z), 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/QZHNC2322895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e085f57ab64baaa3ffb323c341e4b55dd69513b310abf5b4a004068efac5cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFA2048742.