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 0x5f4b6ed343799f21d64795a0754b74afcbacd54d1f7d0d0855955af86b5575fd. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd5b9bd7-6bbd-49ae-8410-6fbc50e979fc.json and https://artists.proofprofile.net/proofs/artist/dd5b9bd7-6bbd-49ae-8410-6fbc50e979fc.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 0xd124286d3cf4b3abaf4b346c24e95e24c10c62a85d57bc882e97e3305c1f41c4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPW562105469.
Treasure feat.Chen-U (2023 Re-Treatment)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b2db041a58bac8d2e0b1f4033618f253dac138e92083585a4a3b9a54b6055d. 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/JPW562107004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746c6cbb4adf84ecea00e072da22d24416c0735af9d1642bb4daf43cd5b9f6e1. 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/JPW561909369.
Now & Forever feat. Chen-U (2018 re-recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8470aa4d2ce2eed2d40c4c0e4fdb42ad624f70372c19885fb668bc640f30f79c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPW562109224.
Everflowering (Masterpieces of Hatsunetsumiko's 2011 - 2013)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3913de0fcdd62d25fd7de41d50ef8bb8ebe5b68153a925b2f368b2a33447de67. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JPW562108204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2351a3938860f6ae330d3c3e3e35981d16bb2c5b05000ec1af7b5151d972c784. 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/JPW562108206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534ce797328bc8dd9e674a1a002393c2661d1ccab6135c3eab473a7dbbbab38e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPW562108210.
Libertus (2021 Standing Alone Strongly Ver.) feat.Chen-U
Starry Night Flight (2021 Late Summer Dream Ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3302daa365a7acd00054c9d2a373eb4deb8e035bde1e1d7ccb8ecc793b9727c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPW562107472.