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 0xbe8a5e3f1acada06ea1e757631c2d083d180489989eadbad051952122ee800d6. 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/3493767a-65a2-4b30-9967-784f1ed354a8.json and https://artists.proofprofile.net/proofs/artist/3493767a-65a2-4b30-9967-784f1ed354a8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17dcc02223a80966b5953cf3cce23e8e97d50bbd8517176a7fd97e96df4b0d7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:20:45Z), 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/JPTE00502300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afc855db9879bcb35fec092b8df15f6da8c73fb027b8601d1462e2bf7ebaf99. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/JPTE00502390.
砂漠の子守唄（シングルバージョン）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c1d8c4b38b8e9eee70fb3aac7af9244a8c99dedcea521a3152e137868bd7e3. 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/JPTE00604120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c1d8c4b38b8e9eee70fb3aac7af9244a8c99dedcea521a3152e137868bd7e3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPTE00604120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49b38911a397dc624e0eb3fa3b5df007f22ee93fa730380fb2ad7020210f361. 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/JPTE00606780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae50e7ffbd750042f5b585f7d4202dba2b2732b574004b19f50223ed2a1ace11. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/JPTE00606790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2439006aa1e6f5885cddebf8024675758694bcffda0f4bc0ca9058c6a0004d4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPTE00811910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb146078e15710819fabdde8e4003a07b7a97526d5f91de0361649d48838c0ea. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/JPTE00811950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bbf1b1e5d8548a617b251537b6f87c261b1a885248be62bd2676ecbac700f6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPTE00800350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a80a54da4e2f4bb82f8807451d24a1c492654bb09d0d24381190078ad53a063. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:16:19Z), 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/JPTE00903550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfc921f79a270177319a286b70e2a73c936cf73c98bada964d2f1eacb5d8cec. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:24:46Z), 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/JPTE00903600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9730ce1086895d2cd126fc66676ce38ab1b07d21043b9f4e93524e59625c8b0. 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/JPTE01000260.
あさみちゆき ベストヒット・シングルズ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afa8098154a998a828358f601c3b5885ba5f008747cf723758f23cc6a1e116b. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/JPTE01105630.
あさみのうたVIII ～阿久 悠さんからの手紙～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db1f542f55e4760aadd592e38379133ed0fe521e98bbed3da11de801d94fff1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:40:52Z), 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/JPTE01208320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b63610e3ef4dc47a75dde71c81f0e27c3f7ada0a5555c00fab8676394b56b90. 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/JPTE01305370.
あさみちゆき ベストヒット・シングルズⅡ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a61ea0eae15290aa3e01804406914be975d9263f2e1d6fcae5f83865a68269. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:11Z), 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/JPTE01408330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5debb2e79610139a64c7e3e2867628aba80904d547a4744c170a9dad89cc489f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPTE02401580.