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 0x27a26816c8626c365c5d3e51d6cc1223b9809e2d99ea6398831d19c3e272465e. 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/3c070428-87c5-4647-8010-dae0727c3f58.json and https://artists.proofprofile.net/proofs/artist/3c070428-87c5-4647-8010-dae0727c3f58.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 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 0xc39cfaff1acfaace2e7e34846a47dc7970a3ce8cd7ce0bba44f8e03d94a306fa. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPPI01450400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f614af2166a5090a37322102fec0c1761a9dd65f01ebb4030c1a45e6c317a7. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/JPPI01551930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f614af2166a5090a37322102fec0c1761a9dd65f01ebb4030c1a45e6c317a7. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/JPPI01551930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd3b77e225ae2e71997af243e3876f8975bfc862a730af3f6e0b10407175627. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPPI01501200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bb7a7e61735eff978ad21475986fbfa3a9d04d7763c57a9ceb25334aae29a1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPPI01501360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda82de3b70aa16da491f089554f8b564fed511765457f4148f8cc4ba62f0e702. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/JPPI01653100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bb7a7e61735eff978ad21475986fbfa3a9d04d7763c57a9ceb25334aae29a1. 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/JPPI01501360.
「ご注文はうさぎですか？？ ～Dear My Sister～」キャラクターソング1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9027d5bf25ff8cddcb7e442ecb78b558ba226b99c09a86aad6c60f4c6efbb24. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/JPPI02050300.
｢ご注文はうさぎですか？？｣キャラクターソング・セレクションアルバム／order the songs (2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9003dc7b32c1d682c5b0f9fb7b0a28ac6954fd21c431df7bc05aa2abf551c5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPPI01501190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a43017a8539465688eb7afd11ad81663c1914e5fc8a55474a38233bb86a25e2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPPI01650680.
お手伝いのラララン添えはいかがですか?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff70168e668593bc066b3d7172823da1061b5adcaa4c7155fdcec70d4b4d0127. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPI01650670.
ごちうさブレンド TVアニメ｢ご注文はうさぎですか？｣キャラクターソングアルバム
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0b9a49a81751b71eec95a54ce17a861ac3134b887b9b682b517c9453fcab7e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPI01452690.
[Is the order a rabbit?]Main Theme (Re arrange)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132116ee4dcd65d0c758d8c5134d75a748c39267940adde0dd17691ba0b332ae. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/JPPI02151500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbba1710e149e302d7babb165fb7b38f98c61b4a90a9ba1767021b49d68aff27. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPPI02151520.
お手伝いのラララン添えはいかがですか? ～Rearrange～
｢ご注文はうさぎですか?｣リアレンジ&カバーアルバム
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead514caf68a86e64a9043074bd067aa94bad154c77ac0e6e3ca032fdb3460c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPI01650671.