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 0xa6f3cdc8bccb17e0120786b72075928b062dde67df02de3ce930727903c0eece. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5ee3832-3c75-41eb-9d19-0dfb8e713ec0.json and https://artists.proofprofile.net/proofs/artist/b5ee3832-3c75-41eb-9d19-0dfb8e713ec0.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 0x8970f4255085a92473e279bfbcdba5a73e113d2fb72f3c43b16b2ecd34d01dbf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6F2486407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f0412a653ee4d98d84942d40c022f3e9ccfc0fd79f9732638118380f8c45c2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6F2486409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a0971d07ccbd2ca562fa60ae937b4a360575fbbfd4033255a6cb78f28ae92a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6F2486414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4be26f544830c2b0c63d3f791314e4539046a545ae8aec1bdcce9db3b1803a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZK6F2486408.
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 0x744c6d7dc04d40f5ff06a6d68ec8b830ba6c3655c6863688de83f69354605559. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZK6F2486410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3dea52a32d59e4d1b07014be6719a735e667ae08351c64e99ea01f0e64c39c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZK6F2486411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8db606134b0b1fab3c25098650f01712148b2b0588c5534b23fd820684c4bf8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZK6F2486412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde79a40584917ce63ec15f45104cd485ffac9716b93480fecd21293b37294208. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZK6F2486413.
君との思い出（※イメージです。実際とは異なる場合があります。）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192c6d5407feabe12b61c0bec2b0661cc8cc986c0dd3dc56d6f76ced67adaab1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAW2272349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441efa3c81d707e79bcdf7955f998c7f01299d79021ab03762d5649afc08e755. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNA2258955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6905c8c499e1c9905c48b2872d5a109bf5410cee37878c7e65411a3676af81. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2258960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008b8a698db62db4c620f1a7df44a50d77f98cb9513cfcbc0bdd5de2ecd5e3a7. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZHNA2258957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4237a72f1d0ee23d76aba88c3d2d29e7a305d4f0e31307226dca23b413b798c. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZHNA2258958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d7627ba05dafb2ee14b9be7e6aebe4eae8ad9de16f6611e85327a63bd78b62. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZHNA2258959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe8050d41c2e1a0fad4b42ab8d5637f1b3ada595d04aea84502c1fb89669b17. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHNA2258961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac79f01179a1f64a4cb25db84cd24299866d490e963a1a4e4367679e7dbe252. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAU2291110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd131059b7b30f8bd67b5d6d255551064221db4e987b4ade806bf8497e7bbc7ed. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2268538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf78ad447200f9f0f170832e1784a8891e6c3f4586b23b8fa0f9dbe26fba162. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHNA2268539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3758bf7e2b34840b8e38e0f60f0be597a9ba238f0664798a265e30e5c5f527a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2268540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46ef1768558d95ef08424571a1d963802bc1bb7a0139ddebc68c5ce98cd056f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHNA2268541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b04978a2170e8e98a8bbbe7cef148dd0b47c14671fae64056e64ec5eaaf7081. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2244086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18b257bed3a0da93558b5a1ab2f256bdbad5b6f287152f1a396b3407f03ddc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNC2263796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165e1cd1222dbefd9293c05d5ac1c7f4feee0c529a8fb33d85d08cb3fa1d1eb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNC2263798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1622863836bd875b9c52184e5d25d61c655aa6d7bd6aa6e059cd42863a07b85. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNC2263799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787b55b6649575959075a0b1ed1aa8d554181e8f9edd8db16a088fee7e9981a5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHNC2263797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4f69308fca975cefd6a52d0e80848b5aae537f64a835c6c9e1d9a7a4d9ff2d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBA2365449.