W, or w, is the twenty-third letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is double-u,
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 0x62a94e1421b50d54f7b1a4f61e09c796a1ae52c7520b792af16a73f63928d1f4. 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/dd734b11-89e3-4b0a-9893-8b86eaf1e8dc.json and https://artists.proofprofile.net/proofs/artist/dd734b11-89e3-4b0a-9893-8b86eaf1e8dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
THE IDOLM@STER SideM ANIMATION PROJECT 04 AFTER THE RAIN
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 0xd602f276b60ae0756268b01be5f5b55c80d143e0eb7be1bece0bd4edba76c817. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPI102000077.
THE IDOLM@STER SideM NEW STAGE EPISODE: 09 W
THE IDOLM@STER SideM NEW STAGE EPISODE：09 W
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81269ff04d7774bbb6e99f7766ea619927ab4fd6d26900cd4c90b7c7ecc2046. 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/JPI102201968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c82a4b6a2fdb8aba1725d42a72aa81adc863d087e52fa2a60d4c8deb1bee4d. 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/JPI102201969.
THE IDOLM@STER SideM GROWING SIGN@L 16 W
THE IDOLM@STER SideM CIRCLE OF DELIGHT 10 W
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb202b360989f23ad8f000194c499d296ca4034862dac9389167db5faad0cf6d3. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/JPI102400768.
THE IDOLM@STER SideM F@NTASTIC COMBINATION～HEARTMAKER!!!!～ -BELIEVER'S MATCH- THE 虎牙道
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3846629cc1fab90857dc37ce9db8f8941a66f9acb3fdbf3b7c9415a344e0be17. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPI102401947.
THE IDOLM@STER SideM F@NTASTIC COMBINATION～HEARTMAKER!!!!～ -BELIEVER'S MATCH- W
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f1f2cfa8437f7f00afcfa3144eb8407382239b69ed82d51452d2f8b4f29246. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/JPI102401945.
THE IDOLM@STER SideM 10th ANNIVERSARY P@SSION 05 W
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ba93d0b0052f9bd3d81150c07e78d79e92ee4a908d943f396af8cde8ec43bd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPI102403105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0b385c8de0c5e7bea7935a8c5806e31f7102dc7960ea892e479d2ef19b7279. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/JPI101501823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac34a05599b720dc90c63821fd491f88cf595826394e7f2cb47d9d28ab27a4b6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:40:55Z), 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/JPI102302167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9c94de25f413198b334f77c38dfe45a8c72394b6c24fa6bab02af99ece2e89. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPI101501825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00860ba415673ae1debc0694d372e1f15c3a2405b8f6f3ae62eed9f68dcc0a76. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:07:22Z), 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/JPI102302168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6675c579fab08b08388c400bc39589c489eb82358591377570327b69f8d1f42. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPI101601734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e88c57f3e1a204c13a2d5ac4e76fe2b55b10397b9ab43e2a75a717a246ab037. 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/JPI101702459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e9d14114b0b23af4fc64cba3bbdbc6ef3f80e49181f25cc073224f23ab03be. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPI102000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f007a55d5f8a6f09285589a9d25b4d2d5889dc4f156341b8eb1c5437954f3b1. 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/JPI102002333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5089bc635216b1e09989febf401c0ae49d41a8d5485f1c3f3df993f8d10fd251. 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/JPI102202825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebcabe35b5f42e63d4b765522d4398d148ad51b4d4de9d793012155fdecf902. 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/JPI102201967.