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 0xd98cf1ba830dc517e1f4956764da39b8199cc1e531e98d1ff09646aab1aed1f3. 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/fdcb5562-d22d-4c97-ac03-e958c2803f81.json and https://artists.proofprofile.net/proofs/artist/fdcb5562-d22d-4c97-ac03-e958c2803f81.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 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 0x4ad49f9dbcfe3db8f9a0f75c87c592cc874e32854a062c39126da835c97947fa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXF171611153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd327d1dbfe5e466f144d41e7ae294e7baf1d1cf1251ff62ee0383d20a4e729d2. 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/MXF171820107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6695fdbd89d4cb588f618c20489f134703eb0c72dd830a0dac6a2487c4a1e101. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/MXF171820108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bca636ec2b1c51f1810d31dde1d6bf2881d22da78eefaff8aea8d4826d84651. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/MXF171820109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf33e4f3f91b29b82ab0dfa8db4ffb42b905a85492512c1a527d72b38d377070. 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/QZNWQ2084713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48086b8c4e1ed52058a0ed4803e7a500243150e6b872ac9960dc42ba6edb588d. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZDA72138012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfd5e6d0068448cbd211e8318986f03c448c8ab599d842976c27f12794936cb. 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/QZHN72178556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c8aa2b6b428eb550bee663483c75e8476c1dd4f6a77d84660a1049825f8e4a. 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/QZDA62271248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a070cb86ef7dbe9a85d9b7429f0c900249d1f656dcf32e026699e00e1bf060c. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/ZZOPM2224531.
Isabella's Lullaby (from The Promised Neverland)
The World's Continuation (One Piece-Red Latino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc294c6095275042b7bc270fbf9dfd6ef426c13dd4d181e729478cd3b4dc364b5. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/BK4DA2312881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f24bff225d779dfe552cd398c0be9fc8cb04a3908616e80d0a305454c2263c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BK4DA2322435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70596ec1daf63ef27a604b7b26c6d3465e5b69160d70805d5a1362788761f4b3. 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/BK4DA2405339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb1f06ca906e1090f7f10fbeb933460a16098158b1081b12abba057bb812df5. 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/BK4DA2410994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18a083920c6459be6809e3af6b4e228d9c5bc79637f29af7032d700bae5451f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BK4DA2500266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cae05c7814d3ecbcb550a69fc21ea064e06246f68149e0126763310f93ad3f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BK4DA2505513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0268c4f0a1c0d1b9376323247845de6a3f9a6215b40f7e18ace09431ed7ff9c2. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/BK4DA2539535.