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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b98ece3bd602e8e5e29b022e47001e8ee2ba8bc3a24aa1085f62691ab9f21d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cc8b07e-a43a-42ee-922e-993ed1384451.json and https://artists.proofprofile.net/proofs/artist/7cc8b07e-a43a-42ee-922e-993ed1384451.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sounds of Nature Japan -Non-stop Recordings by Cyberforest-
24時間365日録り続ける自然音 ～大学が育むサイバーフォレストの地から～
三陸 ひょうたん島 ～マイクの近くに集う鳥たち～
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886f95e0bc909261b48203ad56a1a7aa03a9fdafbac1007f8fac8264ce943755. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPU362040103.
Birdsongs in the midst of winter rain -Chichibu Tetto-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a45d8da48b1fac56bea033db2e638fee81874147e5b0579bdd5f0f4fc6ffc11. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPU362040201.
Ghostly hour rain in summer forest -Yamanakako Lake, foot of Mt.Fuji-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb4aeb5f283a93c4a617e6d83db0655cee21c6e208d43575a44dbd671303b16. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPU362040203.
Singin' in the rain, black woodpecker -Furano, Hokkaido-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7872874b0a610a9f3227e656f197b9ead66200122a213612679f75d46c99ef35. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:23Z), 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/JPU362040204.
雨の音 ～サイバーフォレストの音風景～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7872874b0a610a9f3227e656f197b9ead66200122a213612679f75d46c99ef35. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/JPU362040204.