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 0xe13bfd5c9750ca1cde790f51e06e07544d72ba2d87cb4864d7af640e22897332. 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/1bc31826-165f-4a96-824c-64facb4a6666.json and https://artists.proofprofile.net/proofs/artist/1bc31826-165f-4a96-824c-64facb4a6666.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sword Art Online Original Soundtrack (In Your Past, a Tender Feeling)
Krone (Guilty Crown Original Soundtrack)
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 0x4400d31fe55e39ccec506de855ec50c544e14a46736df6639fb2234164e97964. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZ4JJ1673749.
Elegy for Rem (Re:zero Original Soundtrack)
Kataware Doki (Kimi No Na Wa Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2cb5fa365eb643384ae7780490b1f6330cdc64a3f25b0717468730411111b1. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/QZ4JJ1682725.
Ninelie (Kabaneri of the Iron Fortress ED)
Watashi No Uso (Your Lie in April Original Soundtrack)
Yuri!!! on ICE Original Soundtrack - Yuri on ICE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468d420bdb2035d298f0cfc265f87e5409a010ed646beec2ecdc073d9091877b. 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/QZ4JJ1782659.
Attack on Titan Season 2 OP (Shinzou Wo Sasageyou)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7ad1474673b2e8f7826d24f65b6367ef3a77209d1446dcada0d4d8395b260d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QMPKX1713974.
You Can Become a Hero (Boku No Hero Academia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f837bfeccd662e39da766556feea78c6ed1cb4207457a2ffcc66d04ea7ae0a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM2PV1730042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dab02bca384e1a62d93df50de0be6b9d66800141c2787c2be48b344141fdee. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZ8LD1778482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f968f29436163e9d1854b9eb6feeaafbc9f9c2b7a7cc29242c77c986dceb796. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA61886271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665b6988c33c4aa8c44ea99c57d1ae5824538d28e1571b9731cf1f0d8a69ca15. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGWW2018841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3acd8f64402acd5632c5aa3190c1d8f89a746ac1ef7e3c85e4eb50a141ca6c. 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/QZGWX2065179.