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 0xcb44be8fa3d3b6765a62df373df7316489057002899f88b18ed83404c9125f62. 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/78280bbc-81ae-456f-9825-48ca04dc8078.json and https://artists.proofprofile.net/proofs/artist/78280bbc-81ae-456f-9825-48ca04dc8078.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dance Suite: Shuttlecock, Lantern Parade, Ainu Children's Dance
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 0x4d26f862d5d2e2577568607575b904721e0a09b56af137e3d66284eb3c48e670. 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/USSF15513201.
Three Etudes: Woodpecker, Murmuring Water, Blacksmith
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2012ff10a474febf888bcc9bc45d0836d028b3415253d7647d98d6344be248. 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/USSF15513202.
Theme and Variations: The Prince and the Ugly Maiden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7f020759bcdff9ffd6e4cf867cb4bfc0c1823204c939515756ba45a032ad70. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/USSF15513203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3fabc2c36d93ec152a1997ffd594cdae449d2e8f5a9e770d7a7af685ecec8b. Chain 2 (Bitcoin): anchored in block 957551 (2026-07-11T10:03:47Z), 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/USSF15513204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b311240e51bdc6cac833b23828539e547992cdf0dfc5d6da14b74fb94527fc4. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USSF15513205.
Musique du Japon impérial (Mono Version)
Les plus belles musiques du monde : Musiques traditionnelles du Japon, vol. 2 (Musiques du Japon impérial)
Les plus belles musiques du monde : Musiques traditionnelles du Japon, Vol. 1 (Chant du printemps)
Shinsencho Bukyoku - Second Section, Chochin gyoretsu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bf1b66349f0fc8f5e9ddc31fb99ac1bb8a4ba06fbdcb87c0a4810ffe2c8b8c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEA748430227.
Yamanakabushi: Japanese Melodies, Vol. III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecbeea25bd5f4d12de3e760b9fbd46d896cf878312de768027daa98e4fc3d3c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USSM10010327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f728bf45e62176f180df2545ff2c8bf40bbaabb0974a9854997e45d0839247. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USSM10012882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0279341a885a06a93670f22d9e04780503f988f8bf0443ae0fd1fa6466c600d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USSM10010333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d6895fd465abb5acfd98b2b992cf68cc73a1e74bb0da98c3558364a1c1f6cb. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USSM10010331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a5dfe0cc732e3247ce2dd0c426014eec3dfb84696c28c829cec572c4d11656. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USSM10012883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25262d3261e01d298db9a649ee3b8ffc61ad91cacca8deee89b4c299d045d56. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USSM10010328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a078d63811a99acd03c0fc524bc89e46cc1e9baf46f02d2cc6b7c1c06e47be8. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USSM10010335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7af1df92dd4ff3847898348c319a90ebd432bd8495c76920ebdeb3b4bc6cc0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USSM10010270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55edaee71e546b8845d3bc0f56a2c3695aca5c88499bead204722ae5f45ff2b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USSM10012884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e272139e96f197a0dab3c27fb12cb89564d87c8410e88ed571487603472683c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USSM10012885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0506d67c6c1d58834c8185ef3ec001d5095c6672ccfe15d471dc73e12e4bc. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USSM10010330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7e449c72f9306e8a97efc877dd0e447ab3b280274f5fd3989b1731637190a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSM10010334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953cb3345689a8837e62eb6a3bfc403833b6885983c81792d3a46d4e61d60b69. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USSM10012886.