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 0x099b1e8edd2ee450fc4303567a3141c97a4cc6a76a4f008387302c8018f9dd2a. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff4bb94b-0c86-4a91-8e2b-4bba788f6d83.json and https://artists.proofprofile.net/proofs/artist/ff4bb94b-0c86-4a91-8e2b-4bba788f6d83.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Vague Blue Haired Girl Broke My Heart When I Was 16
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 0x9825a0ae5c48dc48d262d50c89c83d2c89bab66a48ddd3a69034e2ea830b6f04. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA62369098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1992ebd8de949f0cdf4b602a91f0d615743d881a7e5cc1cd87c48dc4fb01eddd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZK6G2491542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d7fbec4431ad33e8516e546494552cb110da7f7aa9f0613c88f12df3da9dae. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZDA52572435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fd1d0c94582a78f8975d5450390d1aad7c3e28825cfff9a8a9d00b80342230. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZES72560758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae3487e4abd4cfa75cafaada3b0bfdba7221e9894fbcc42130e5d590fd18492. 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/QZHN92505659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae3487e4abd4cfa75cafaada3b0bfdba7221e9894fbcc42130e5d590fd18492. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZHN92505659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfdab7a59ac58f486661788cd2bd19cf3fe8a7d536943a96ff5db8b7080e1ec. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZK6J2518289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94b6e4e0881f8323efdd7aab7650ec643054a4a0fa2ec82bc74cf73a1778f9c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWX2550464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac34cd2587fb96648d8b6105ad9351e045057fc18412268b49f128a2341da2aa. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAZ2542079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53917b8fe26294a4a156057e00baa462a532a7f832e2204047a503795bd8be26. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBF2587210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c3bb794fce9d5c43056fe55b32af234cebbeccdb0d78f8216f3aaa40fa400c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZWFU2591260.