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 0xd116ddeb3b2b80c4746dfb615aed5875bd980a94c56c10d70aecc916e5acbcb3. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3c311fd-b564-4b97-88d5-058cbf8b2f04.json and https://artists.proofprofile.net/proofs/artist/a3c311fd-b564-4b97-88d5-058cbf8b2f04.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 0x764900be7a78a193dcd23f49f6e41a0d0b416d1292d18fa9c975326cc9f7d424. 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/JPCO02301540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6a36424edcf1302de5d263bb355d35ceea71e91195fe840222a2ef5f80b686. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPCO02301550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6391fe4aaf8a0fe6efe20f788f0777f969a3eb52e4d194d84d030cf9a486bf1f. 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/JPCO02220450.
もう一度僕と恋愛してくれませんか？
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ae05ff0f7cc882b301200ae91194b2c54d6d8ec0567c4b1f9338e3f1067750. 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/JPCO02219970.
七色の絵の具で / なんじゃこりゃ / コ・ナ・オ・ト・シ / もう一度僕と恋愛してくれませんか？
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6391fe4aaf8a0fe6efe20f788f0777f969a3eb52e4d194d84d030cf9a486bf1f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPCO02220450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6391fe4aaf8a0fe6efe20f788f0777f969a3eb52e4d194d84d030cf9a486bf1f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPCO02220450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ae05ff0f7cc882b301200ae91194b2c54d6d8ec0567c4b1f9338e3f1067750. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPCO02219970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ddbd02e464e3cb788877acefca48c5e2f5436d05db36a347e9b3ded78f72e0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPCO02122110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91cdc6736a33a88a8d4b37f55c7f47aa9e9c43d44aff381f9610ac358651197. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPCO02122120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe34c1ec1a80fd182660234ca2e8e40720b0a4c59c6b3aef8d22957e41ef9537. 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/JPCO02016870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f51ab7c2b3d032a04faae2af1da6de0da24f3e515bcbc0f397f16beb990f433. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPCO02016880.