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 0xf9bf66865a0d77de6c5a086d14f9c8d9761c38ed7627da791c9ad50da4272f32. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63d1a7c9-2c1d-4130-82a0-5b88b1d7861a.json and https://artists.proofprofile.net/proofs/artist/63d1a7c9-2c1d-4130-82a0-5b88b1d7861a.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 0xd278d81bb6b0a50a695d813725e80a2acbc10152abb3156186c87267c86a89a8. 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/USDHM2402632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc468ad81c01b5e2e51e5883ca2be8f042b10571e9afefe5ee01139138b0c2636. 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/USDHM2309744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a23ded855e27c1bedf5d032a67e1947c5251749279395c32af1449821c1a0e. 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/ZA3LL2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc6136117f64b08fb3865bdb9d880d4191c0a4f071e5319830e806bcd77d5ea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZA3LL2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b88cc4d9c7bd45645a743dd09fadc26597bfe514ca4a5d8ca04a621e29f107. 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/ZA3LL2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3c3b73538a2e4005f7de38e25677ae285a06a41c18d3125a5aaec817a5be8b. 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/ZA3LL2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b88cc4d9c7bd45645a743dd09fadc26597bfe514ca4a5d8ca04a621e29f107. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZA3LL2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a23ded855e27c1bedf5d032a67e1947c5251749279395c32af1449821c1a0e. 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/ZA3LL2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44b0b97d4227afb269447377fb363d0add55ed2b5e8ce8b76898410d610289e. 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/ZA3LL1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1899c7dd51b7b5603fe3381bcd34225feaf16ac5aa40b452c79037d6aa7fe4b7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA3LL1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85f0cc70b29d995356d2c889dca22018464bd928b5bb46dfaf01fb0d2442a75. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZA3LL1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f71e844bb66ba022f2ac924613743119ea3e6adcb51c2ab0098541657976790. 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/ZA3LL1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96af4de264e632f1b54bcbeb32e443c72b9f555375a1e1bae5a8cfbd151dfa99. 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/ZADGR1500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd429588ecd245892d6282505f3c868542af5a439039148d04661578f70a7b06c. 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/ZADGR1500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a8404afd4b95512597b0ce9f5bb9a71acbbaa872043468cf9153ea0a59a024. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZADGR1500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96af4de264e632f1b54bcbeb32e443c72b9f555375a1e1bae5a8cfbd151dfa99. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZADGR1500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134c2f58859df75558265a31377cdba12af5ffa3eed08eeaf7567dc8e3f0a5b7. 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/ZADGR1500015.