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 0x88d9a128734ca4085566aca2a18019ff7cf671a03a525485e340eb589fc30767. 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/f8839902-f3a5-4aa1-aef6-624274081b22.json and https://artists.proofprofile.net/proofs/artist/f8839902-f3a5-4aa1-aef6-624274081b22.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 0x55c8227d2f3668840980c41fbe4153ce5826d76b4a84cacfcebc780555f54b62. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/NLT2H2100254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9370639677863a3c876bb825729f410dbad882fa34f5ded467b52dd23cfaf745. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLT2H2100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53183f3e351e3852a0eae84bfbeea08029535332ba4742286d0a4ec68a7452fe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLT2H2100799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d3019a0ac1926c520258e9696bf8e0c4448a0bdcc84654953df4a16588e6f5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NLT2H2100942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c26ef919d40977eb9843c09694307d90a982de44dd2918dd97e829ea7ea0374. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/NL4WT2000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaad573fc9867a2b83042a5dab11294d31cc3aef9063e4c1f7a5e751511e826. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL4WT2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5533099b9ddcbbdffed99e5de1b6d7d0dc5e8bb8935311ae988ff129a68fcf78. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/NL4WT2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc48ef2faf36beb040bcd0f6ab87daa1ac9ceabae64c95f4e620b0dd3661700. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NL4WT2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcabf819c40bc334058a6fb185b33f5f3eb060ff0b9ea5918100c77bc23974fb. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/NL4WT2000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc48ef2faf36beb040bcd0f6ab87daa1ac9ceabae64c95f4e620b0dd3661700. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/NL4WT2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b27b8fed67db4161e131c7c81ef4400b13d60e04a9dd6f60983dcb2b222962. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NL4WT2200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c28fd59ec40781616a4148e4d83a6226aa89445edf7c88af111434480df133. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL4WT2200228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6213ccf813f5e413307a75536255df6a26f996b1fdaea733735466394077ff3f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NL4WT2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9063189175bb483b01e6e2dec7658659829ff54e00ae88cf9d722865f3585d84. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/NL4WT2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fc06edc1697a93bfe27d827a44a003c75b6bda7f78d65f17681ded56f1123f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NL4WT2300167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276452d0ce21bbeace4cbaae5bf2b2c7e9d2fbb465b9333cfda740a1d13a95cf. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:12:23Z), 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/NL4WT2400114.