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 0xb4e6125657123b87e6ab9d9a793a062d054f289c0852a624f70e7ddc23ae8461. 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/2c8f89a4-df59-485f-b748-9c8c625af09f.json and https://artists.proofprofile.net/proofs/artist/2c8f89a4-df59-485f-b748-9c8c625af09f.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 0xd91c08c96438e2a5a774c1b100485e499fa6ed4f1143303f9256e650c78234a0. 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/JPE561401611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7704361387e89ad17d4ad9700f1fbed2272193143302b48e17b324537b7b91d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/JPE561401614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42eb356cffd8e0a7399083f69c8eb78dbcf16756d83233231a7b49ae3d3c964. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/JPE561401615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4524d6991372000a95d2b7693d60a523970b01199b5b2415b51e934119c917b. 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/JPE561401616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a717b299d38d427aeb70e90212fdc385e75e684b291fbb3c42520a7950ff7e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/JPE561401617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443d5cf60b3a15f70c6040af2341816194baaccd1468d126f2c35b1a40e7e6ba. 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/JPE561401618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb422486d07426136f6687830e5e8e6b259c06c3b73a7b9afdbb573a0be94b1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPE561905414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee269b987f05fe5287845c2e3787f1d7803f38b5666c1053f9730b5195370d0. 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/JPA652308943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d70e3ef06b26a635ba9e02eb15d29c8c02e018c01ac4ca7e197aa7b64e4c4e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZP7F2579088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41099b04e709010b908364c347b0a7a29ada97276b7355b81528472020f06614. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZP7F2579089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660946be58fb192ea8c550d8c92982c54bf3d2dac05e3492b54107d8a825207c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZP7F2579090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf71b6553fb767800b92e70296cbd4b5533ab859cbc9ac012e3b100319590fef. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZP7F2579091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0702eb7f1f17e5cfad509a659367780c35cb75ec41c08b2bf998e68d24de4b1. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZP7F2579092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc329e0d6c87a3c6094efa54cbfd634c5739b1a995a6f4d04b1ad6b7b1a1b41d3. 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/QZP7F2579093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572bc98a3094b2804e241bcaa71eb7c89d82617e432d6e1b9fde542768643109. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPC230901498.
"Utayui 575" Azuki To Maccha Character Song Collection!!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa802b25027503b809cddaad64f295811ffcd6dc88eddd4bc7d941cede38029d7. 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/JPC231400136.
ぽっぴっぽー -MIKUNOPOLIS in LOS ANGELES Live-
MIKUNOPOLIS in LOS ANGELES “はじめまして、初音ミクです”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1bb30fc41b6d4c1a5f8ed827cd86e02cd9293e540887f6734204b43fd99232. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPE561301073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfcc87406bb161048c8286a49328bede8c441eafb642248c8ab4aad6ceb22f6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCJPT2212739.
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