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 0xc4d54b1d98625292fd129d1e20211150d0f2a10aeb2bd0becb1c75b17bd1ba8f. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db07c0b9-a195-4f3b-8909-1e41d09a68ee.json and https://artists.proofprofile.net/proofs/artist/db07c0b9-a195-4f3b-8909-1e41d09a68ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
fostermusic Best Collection 7 - Tears of PRINCESS JOURURI
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 0x81f024a95171e91f02e76f3e1b685ede6dfaa27d8fd620f1af31490709efb92c. 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/TCJPI1946811.
fostermusic Best Collection 8 - I'm glad that I met you.
fostermusic Best Collection 9 - Night on the Galactic Railroad
fostermusic Best Collection 10 - Everlasting Voice
Small wind band repertory for competitions volume 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d4ed62b1ef37748cfdd9a2b948bf2574a90af3f48544b6256f28471020269f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPZ921811502.
Fostermusic Best Collection 11 - A Variable Undercurrent
Fostermusic Best Collection 12 - Metropolis
Love Is a Wild Bird: Classical Masterpieces for Wind Band by Masaki ITANI
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa924c3b1145437c78c4b5875a619fcb482840f08340b39c6a92e1d3e8451b83b. 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/JPG600913405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0121a49fffc7ad5e7edcf3552f615730e4d6cb866fd96c238b62030e3c90a8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPG600913402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa924c3b1145437c78c4b5875a619fcb482840f08340b39c6a92e1d3e8451b83b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPG600913405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e9fc812017ce7422a6dce5cac7f200779e8213b47be5b58e2cf205b9f52faa. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/JPG600913406.
Archangel Raphael who leaves a house of Tobias
The Works of Masanori Taruya Vol.1 - The path below the moon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d80ee6fc972aa7dc3baec1f2a5746536a05a723b5ca94d882989ef19d730e12. 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/TCJPL2096481.