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 0x8f9612b86ad9b1ea33ff97158a709bc33a9879e89a05cccf53115648330e2509. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/486f2303-3fba-47b0-9af6-2286c46f8cce.json and https://artists.proofprofile.net/proofs/artist/486f2303-3fba-47b0-9af6-2286c46f8cce.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 0x215afd91cbb42ec73e7983d518a4a798cf25e0cfbe60bcde33d429ddf6d9bb61. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZTAS2131470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b5f527f97b9b6daac26e2acc90919b59ad1859e89f5d446660f63d363fd896. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:36:58Z), 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/QZTAS2131472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b5a310c18e8f4f7df11459cecab4fd1e01de715e9390f980b7365239f9912f. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZTAS2131473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83892c4ce380a37b77006a18bf829c9103a3cd267bf5d0f97d583b7a6ee1d8e1. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:26:37Z), 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/QZTAS2131474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9287b49cf889eadf9f37e1c733f8bb96746f1ec5e7fbed979b1b832cdda46683. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTAS2131475.
Heavy to the Touch (think about tonight, forget about tomorrow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632424276d7a6fe446eacfadd8e4a51646e3355e2e9c83389599aeea085b5b73. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTAS2131476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41151ec1589aebf8053e7521e73ca02987bbe3af36d5b51184d3d63a42f57fb. 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/QZTAS2132535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc905c1f2af221271f28ba3429ad5e08943378f6491563bf3ce3eb5f0ea5908. 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/QZTAS2132545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44637a4c3d9ca245a7c499d116d7e8bf1d82512e841f6da8a6f246b5c75a0dfb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAS2132546.