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 0xd36e7105da65eda419b75e8716a14ce44967a8729a148619de93d66f41ac3279. 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/167b6ab2-1a6e-447e-88e1-a5659182fad2.json and https://artists.proofprofile.net/proofs/artist/167b6ab2-1a6e-447e-88e1-a5659182fad2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
THE IDOLM@STER SideM GROWING SIGN@L 02 C.FIRST
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 0x871801d3c12289bae269fa04d3fcd53cea6a8d59525e3bc5c6e45df56d8dfbf1. 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/JPI102101857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0934d7fa88d5411f58b2d8514200ddb8de8f3c6df2ce4ed3bd678f919e4597ae. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPI102101859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf884e4572e020f160b3d6d476c413e4fe67647e30a9b8db4e0bfae626bc20c5f. 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/JPI102101863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3978ecf8c37b418e7a34b9b3bb94ea227cc0687e4fe60d9aea9fb5818fdbed3f. 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/JPI102101864.
THE IDOLM@STER SideM 49 ELEMENTS -02 C.FIRST
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1512304a9a37118f99447bace9e5dce8dc1ba151fffccf1370b308e294ee4c50. 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/JPI102201698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a29f6933432b485d753db62de28609b38fed817fb33378e22fcd428d18b4318. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPI102201699.
THE IDOLM@STER SideM CIRCLE OF DELIGHT 01 C.FIRST
THE IDOLM@STER SideM 10th ANNIVERSARY P@SSION 16 C.FIRST
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871801d3c12289bae269fa04d3fcd53cea6a8d59525e3bc5c6e45df56d8dfbf1. 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/JPI102101857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0934d7fa88d5411f58b2d8514200ddb8de8f3c6df2ce4ed3bd678f919e4597ae. 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/JPI102101859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf42ad6f191f4a704c015a56b69bbc978c6eb46f29840be080e5ee9f3ae44d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/JPI102201696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13ff8bfa1ac7a262c64d8458309ae2bdb2671819571201a50cac82ba089b34f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/JPI102302608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351ede900515d9b1b7149c483296bb0ef90e409c726ee74055cd68f4fc36783c. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/JPI102302610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c431575b3a941c874a70d5eea5b666364d6c37918b2bea84a136646954e152. 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/JPI102202165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9ee4c79b6c60a1c0780724104e5177b9bf9a9b4586102d46ae6079c0e2f042. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPI102202166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107117111bfc02c15d5318c6741194f68b4b37437fe5716790aa44e0648c995c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPI102202167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99da6d57e64654c50f44f2142f218ec8684e8d77a199b37f33a23c852c17a047. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/JPI102501006.