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 0xbb3a42e6e400a8dfe13728f9fd32b28a226a2d2d1e36c7ea631bf7a960ae9ea7. 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/a370a8b9-6e99-432c-94e2-40aefedc8b1f.json and https://artists.proofprofile.net/proofs/artist/a370a8b9-6e99-432c-94e2-40aefedc8b1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zankyou Sanka - Demon Slayer (Lofi Remix)
Everlasting Shine - Black Clover (Lofi Remix)
Fukashigi No Carte - Bunny Girl Senpai (Lofi Remix)
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 0xba63f98a83f9d289e83e6ca18fa50ce44023a956b886112acdd53342757dddb1. 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/QM4TW2364575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3274848566c211322920f7d97e2c587b2355435ac99b3bf11b2b9c6a59d0fbc0. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QM4TX2392799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755b94a0b08c575739458f27076bc4ca16c2fea8042ca95b96efd59bdefb5cee. 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/QZMHN2444543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e2a08829728c178acf7bc73349bc108775863dfe13dbba583aa38139fa4716. 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/USANG2432048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08e548177bd15eb60c78283954ae749e0fdba2091a8d31c4c174ffbdea1ca45. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/UKZGC2409323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1efc9e71b77f2aab258ae7dcb22627d1f7d4f9585ab05e8a70ef50f80e1f122. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZS642438859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4c4678eb30d56d4b9acce8ac5afc9d97a0ac440416047308a735327ec1a6ca. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USANG2516056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618a589002f891d2ebed53bead55577f0669dec8de3bcfcccdc59a964c746e1b. 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/US3DF2275408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86168ddcdfaceb501417bcf973a8cbcde672fb0bb19dfba7d6d14f5cb93fc44a. 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/UKZGC2301835.