thumb|The picture stone Lilbjärs III, showing a helmeted woman receiving a man with a horn of mead. On picture stones, the recurring motif of a woman receiving a man with a horn is generally interp
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 0xb47e98009bd79637c0e4a210f08971a1da7de3d943bf8a4cfd5aa8ac2030ed03. 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/245f848b-8076-4b85-acaf-ef38788b532c.json and https://artists.proofprofile.net/proofs/artist/245f848b-8076-4b85-acaf-ef38788b532c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
あんさんぶるスターズ！アルバムシリーズ Valkyrie
あんさんぶるスターズ！！ Valkyrie「Eternal Weaving」 (Game Edit)
あんさんぶるスターズ！！ Valkyrie「Acanthe」 (Game Edit)
Valkyrie「Acanthe」あんさんぶるスターズ！！ ESアイドルソング season2
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 0xfa698603a11d0aed9dd4a8e6d283c94196dc850374665b9fb7c9eaaad2f7394b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/JPD642200106.
あんさんぶるスターズ！！ Valkyrie「迷宮電子回廊」 (Game Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8691f030290e1d4c77401a3c0f11491b23f45ec624a150259e50261157c994a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPD642300046.
あんさんぶるスターズ！！ Valkyrie「Le temps des fleurs」 (Game Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471e7fcf007b3e81cc78b598a9bfb5ce9841cfccb1ac1a96ae6074e60b68359c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPD642300298.
あんさんぶるスターズ！！アルバムシリーズ 『TRIP』 Valkyrie
あんさんぶるスターズ！アルバムシリーズ Valkyrie (Instrumental)
あんさんぶるスターズ！！アルバムシリーズ 『TRIP』 Valkyrie (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dfa13fcd8270b4b672dca53eb8ba5a6b88d0676c25da34d676cd93cbe961f5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPD642400397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c49e579f0032e4180583631ae6d102fbdeb902f7b3e7a2c15311612d4ee445d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPD642400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01506142b605e4475243037fb1c29ac656de3f8fb241509b8db66107db7fe8bb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPD642400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ae30b3aa7cfa08e7e09b8f81260697768c0df5b437de7e53c6d4da53b10b1a. 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/JPD642400400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f86f2fab0aa3cde9806d3a71b7ed5bff114857fdfccb7c2a9842484463830fe. 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/JPD642400401.