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 0x0f595323527ff4bd06e25970abf31decef079435d0439373b7294a303db8deaf. 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/af4733bc-ac87-4181-8ae6-f12b16139f1b.json and https://artists.proofprofile.net/proofs/artist/af4733bc-ac87-4181-8ae6-f12b16139f1b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43157922685c505d3d42a4224d8ef7fd2839f3ead1b9cefc9c9aaac7166002c2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T07:00:58Z), 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/JPWP02202535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43157922685c505d3d42a4224d8ef7fd2839f3ead1b9cefc9c9aaac7166002c2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPWP02202535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5232d91c84006af012db3fa809df0dca9d08ceea98a81d24d9fd561ae9fe204c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:03Z), 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/JPWP02400528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48055790ab8fe9eb34000ff29d58153a70155a8ebc3f5c870ead93bf7dbfbcbb. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:45:34Z), 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/JPWP02401393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6030fcec28250a0b728d2f0dc2a4f0d792ad1f4f4e8cdc2de36f5ce4b0b62aa1. 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/JPWP02401598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3fed15a6b8df97a4ac7adbc954928d5e9e52b08b9917e89b90974d3d73e5d9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:49:03Z), 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/JPWP02401597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaed63ac3088f0d2cdefa6f155264fa5427f1bc04cc3a49279bd66cd5024809. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:16:39Z), 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/JPWP02500516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e48b044995da622864e9da944ae19ada730a340143abe71333b01555e41df4d. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/JPWP02500517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6c5be13436dbbf32f3df27556007e102be17c78412cac49a1f37be4bc7341. 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/JPPO02402923.
「サマーフィルムにのって」オリジナルサウンドトラック
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ffaf82b18cb9fd287951af7365468aa6325dd3a1613d985554d282693725d9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPM902200065.