thumb|Interpretation of the MEMEX at German Museum of Technology thumb|Vannevar Bush A memex (a portmanteau of "memory" and "index") is a hypothetical electromechanical device for interacting with mi
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 0x2b78fcfdb9384fd775a61b2b84f323f83a70dd1053d240217ea3a99cdefd09d1. 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/8457ca85-d677-4547-acbe-2fd5450d6ef1.json and https://artists.proofprofile.net/proofs/artist/8457ca85-d677-4547-acbe-2fd5450d6ef1.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 0xfdb7cddca7e783c40981612aa70355605b23a36508df03ac635ac192796e07fa. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPN2055717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b58da428462d7cec1d0f2532b48fba8d8a05e4be4bc89e6fc2a245777413e9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPQ2111222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b58da428462d7cec1d0f2532b48fba8d8a05e4be4bc89e6fc2a245777413e9. 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/TCJPQ2111222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1012f5759c694dcc6a09be85e60ba10ebce4a03f4ca4c3a6a0af7bc44f93960d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:20Z), 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/TCJPQ2170832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1012f5759c694dcc6a09be85e60ba10ebce4a03f4ca4c3a6a0af7bc44f93960d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPQ2170832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1d103476e5d4b1ac3df64c601e9062f088e2e495b6f5927a4b8b7c390a8350. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:24:09Z), 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/TCJPT2211877.
Yurusaretakunai (feat. VOLTA) [VOLTA Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddb6ff9deba2db16c334f890bd2d16af60b977969656ec1fafe7da23f084ac6. 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/TCJPW2302138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3819ffcf1f79bfb3a09f6beacf75f5f928e0e8d0c9daf2d5ae26d5ff459f5e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCJPX2351700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3819ffcf1f79bfb3a09f6beacf75f5f928e0e8d0c9daf2d5ae26d5ff459f5e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPX2351700.
アストロノーツ・テレキャスター
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a364b90a62e5c0e56223c15d3676c51f6bcf45f8f33b90d50058c95e2522dbe. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCJPE2588553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930a3e64de0d1d4858806f0ee331a1cb294ed68677dbda28f82fdb8ad9749f2e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCJPG2520836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b5e154ced980510a9363471c2892668f23c53bf5874444139fbc14f41ce0bd. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:23:18Z), 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/TCJPH2557992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63713a959ecb1a3940b28f355e7fc0c1b6beb87c2369a19f880e85b29a8d1fe. 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/TCJPH2557999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b5e154ced980510a9363471c2892668f23c53bf5874444139fbc14f41ce0bd. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/TCJPH2557992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63713a959ecb1a3940b28f355e7fc0c1b6beb87c2369a19f880e85b29a8d1fe. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPH2557999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eec3c9462a392335a6092cdfacd154fec902095f1f11f178d5d08ce0a6267b2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:37:45Z), 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/QT66J2526454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eec3c9462a392335a6092cdfacd154fec902095f1f11f178d5d08ce0a6267b2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QT66J2526454.
CHUNITHM ALL JUSTICE COLLECTION episode III 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96115078b42bdff922a7a340a18c8723d74a6e9792ed135b60f9c3433dcc7e94. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPX302243020.