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 0x11ddf359009eccdb7b855a288ef635e6800cbc38408863d405440404bd5c2e34. 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/30def2be-bbe0-43f9-ac8f-f267ece9311a.json and https://artists.proofprofile.net/proofs/artist/30def2be-bbe0-43f9-ac8f-f267ece9311a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ときめきよ永遠に ～ずっと忘れない～ (（福岡Ver．）)
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 0x617a18badec2691d2c9db2ad30f1acd6a3f10db5ce188b17072bebabe05f09fc. 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/JPZ921607561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05a49a1386d4f68185d0366e0c0c6ee1bb548e603d2fbc7f3b27477ef442478. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPZ921705467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb1b40353dc3220d281f36b25f238c3db0e4e85afcf459374908284a04f7a4a. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/JPZ921904075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0807cc9f0fb162de681bcb3ebcf0ae043c57fb9493ebdc32528e3c091a3f5d. 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/JPZ921804015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e355e8ec6f4070bcd968fd9b908a554db9d13808613d72b236b4ffd3338e55. 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/JPZ921604617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e9abdc705989e8e87893cbfe39e900966530a62bd95522e232bdb86759fc6d. 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/JPZ922005112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade725d379e16c9cd32280842757f1dd0f16eca5471705789db9f02ca6888119. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPZ921604616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865df9c8a69e0292608b927fc27c07941c75e624bdf04b5e7b9d33d0a55c9a7a. 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/JPZ922109915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa313c3acd105ac459822997535e063ebbf9ab0ee7f595cdf71a0671af49c1f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/JPZ922211734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa313c3acd105ac459822997535e063ebbf9ab0ee7f595cdf71a0671af49c1f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPZ922211734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d428acf957e9f5a21e2a706531e033f99e747ae0d07f5a1816932d0845d45e9. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/JPZ922203771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06901f8fd37992c9b4bc561a3f66caf76cc95b128e5581c5e8c391706036a9ec. 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/JPZ922301986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce10de2d7f97bd461e5cbcb28a6525bbec094cd3a4f3e0087648020526e81a0. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/JPZ922404190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a3016827ce7cf70788a303ae1e8043cb914497945e9e53d7a745902f01a7c4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPZ922506346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2d296f01bb4d94679c10e8ecf4f5db24cdb46c785f314f766ad8853eb9397f. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/JPZ922507282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e9abdc705989e8e87893cbfe39e900966530a62bd95522e232bdb86759fc6d. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/JPZ922005112.