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 0x151ccb8d47e66717a59ab9e1ac253f5aba8f02acf693b6456deac6f449834d3f. 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/2ab6f5ff-10d4-4643-b5f9-7ed21584649b.json and https://artists.proofprofile.net/proofs/artist/2ab6f5ff-10d4-4643-b5f9-7ed21584649b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lm4m (Love Me for Me) [Karaoke Official Version]
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 0xe6c3fefa57896c839198c453195aef40a465b4f9765466899306972a7165eba0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM21301346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9091abb0725812af834a6d83745f3fd5a92f680fabe6ec690d51da5ba7179002. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PHV031410235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df303df8e4e13390b48d677283291fba34e5297179ac778359f607a456b381d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PHV031710084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c0bbeae94e4aadbde835f4e1359269d1148407f2acb8bbdb1e80f07a2ae4e1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PHV031810421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554f19c183dc3cc21b85abc23a1f37355b3289c095311e05a3704a9cc31da1d1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PHV031710182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44267875000cff0cc0a9ec3c856fba4182b22ab5bd38222747880fe604fa6d0. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/PHV031810226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db062039352598c94f02a242c3d35d235ea6d38e94edb587f21fe8905cc91f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PHV031610072.