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 0x7eca0ccd4c92994095752c428d5327368f9c2eafcb7d25d0eea762ac08fe5306. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6df9fb10-6a44-49be-b310-d9965ad74186.json and https://artists.proofprofile.net/proofs/artist/6df9fb10-6a44-49be-b310-d9965ad74186.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
気分が高まる作業用BGM -House, Future Bass, トロピカルハウスなど-
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 0x99b23cc8fe8667ce8678ff360c971093030d1a3901deb45a3a3873cac0bec147. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPW792013863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d15635b265abd99de273f62c34f3aad66c3ffb2c4c5831a34c108678591a19. 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/JPW792001759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eccc3b449db7e754ae235022b1bb4b943db74909ecad00666001579da7c406. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPW792013864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa0b32ba77949e6c8c3a4910d7b534fbe3e944828a4aae0de4b95419d9d2579. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPW792001757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb4ac19a861595e7c930841d12815979e9293d36eda39a99ce35ff40b2b5c32. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:18Z), 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/JPW792000045.
和風のリラックスBGM -箏や尺八、三味線などの生演奏-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667b2dbd2d2657513ec4f62aaefe0cfc7adef1aaf3d540d8ae639fa63ffa3802. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW791900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ace130e14980fa030033d9d42dc7e352ea16125240d6ef50352783bc197e77. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPW791900013.
和風 Vol.1 -Instrumental BGM- by Audiostock
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408f04d3584ba0e69523228c06902f72fc232ce63a74abe9b3600056c75c180e. 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/JPW792000067.
ジャズで仕事に集中 -作業用BGMでカフェ気分-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a8f86568d1c67448116665b89a194f0f216b72da53b0abbb0fc68b5789be98. 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/JPW791900025.
和の心を感じるリラックスBGM -箏や尺八、三味線など日本の伝統的な-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42ba7c540b6990d46096f8c715efdd3f682a1a67f97036e552ca60724100b31. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/JPW792000572.
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