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 0xd1acdd600ae8b0c053ed6fe365c46ccfca77d0ee65542ab37abe562a0df72081. 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/27118146-3620-41cc-9b6c-089cb0857792.json and https://artists.proofprofile.net/proofs/artist/27118146-3620-41cc-9b6c-089cb0857792.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
スムース･ギター～70's ポピュラー・コレクション
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 0x25490c4cd0f082e1d8ad6f0856313d4e912b63918ff0c41090b21b69d788fa3b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JPQ700300113.
森のバラッド～ジブリソング・オン・ギター
君をのせて 「天空の城ラピュタ」より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7a33c99deef322b22c63fe38df7b5d8c4e971c29b35701fbcf399bc2316e80. 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/JPQ701700018.
さよならの夏 「コクリコ坂から」より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd52aad2190438e5fbdb0deb69f115f4002040500940a2c6ec1623b5ed319c24. 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/JPQ701700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f8bb78a46d387ed036dcc2a6f75ec07445955c2f447a668510e7d1b31aac57. 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/JPQ701700023.
風のとおり道 「となりのトトロ」より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe952cbde4f93e8a90788a1391e529ae823891aa539845dca6674e24d5dd8093d. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/JPQ701700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84536a317f056d65afe191a73707635a187d3d260f69f2be1ca82a3668edfa9c. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:46:47Z), 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/JPQ701700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f9f369e11f5e2cd0cf31ff6b26808757eac3f57c0be0566cf64070c758a392. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T19:00:59Z), 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/JPQ701700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeea75f9e2011b2c33b7a291c55f596744513806fcad79f50e68d7f3299887bb. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/JPQ701700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddc7b54c76c03ac163409ca4d1b61dcb3e5248d238ae8963917b30e4f72970a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPQ701700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465444fb1ec7eb2153496e3fd1046465cb5b7649d4cdb8a166d7e2cad3ac4676. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/JPQ701700031.
星のバラッド～ディズニーソング・オン・ギター
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ac798238add90a4ba61e0b00c193cfaa2f47e1f02022390fa79d5b97cb5699. 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/JPQ701700213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2275d90033967ffe3c506e70d8c9f7179f28f4f7a280c8c571d2a35e485b2da9. 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/JPQ701700214.
アンダー・ザ・シー 「リトル・マーメイド」より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a41c602165abbbf1e32beb204db3f91c6045fc0a3a46d066d791df7fd04ca8b. 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/JPQ701700215.
ホール・ニュー・ワールド 「アラジン」より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf654224d23fb6ad3ae640394a0c02326e631a189a5ee756314a77e19ed74c. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/JPQ701700224.
右から2番目の星 「ピーター・パン」より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52d3e28aa08353445a5521feac51bb48f3ca273095278e8c3f65a57ec1de2d. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/JPQ701700226.
虹のバラッド～シネマソング・オン・ギター
スタンド・バイ・ミー (映画『スタンド・バイ・ミー』より)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74056d898ce3f7db985e325b4f9070782d62de85ad9a96fc1cbe319a6ecd6be3. 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/JPQ701800153.
ミアとセバスチャンのテーマ (映画『ラ・ラ・ランド』より)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca348be2e493a75c96dee389a0fe52ca8c7238db77b2391c120a3102d86e608a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:55:55Z), 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/JPQ701800161.
リメンバー・ミー (映画『リメンバー・ミー』より)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03548128abaa34d007b07a7bfb8752989a056ad789e62ef43b7d67edfa8877b2. 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/JPQ701800163.