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 0x5ed46daa6c1d2608473b63c3d54f1f65f08bdc6b9fcc515419e23404f5b8fcd1. 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/9e622266-d67f-4f9e-8821-24290eec2f7d.json and https://artists.proofprofile.net/proofs/artist/9e622266-d67f-4f9e-8821-24290eec2f7d.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 0x665012835fde56c1ea9032a7490d425f63dff26547cb8d81db1a277a1d691d1b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGM2213045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8727a82bba28b7ccbca45e9ba0d7f7361d2746c121218382eb4b346c8ec075ba. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCAGO2244887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1353079e724197cdb7efe5e417f92264b6473b19dc3f0823bdc0f24fd24cf5b8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGR2268135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5494d2b64f5c6c2afd39965bc08e232606d663360c70b7d351ab526b07b8e603. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAGR2268146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d6542bce96c03af3562a604fe42c89d463a5a62d7bbd329f3c28a183e4ce8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/TCAGR2268157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df0e620bf72827dad850511eac77783bdf771a3b03898f4b8b2ec3baf6615bc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAGR2268159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18ca67d39857c15a24ae4776134cfcad6a1818ddf375cd9f2eab7748a28cc60. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAGR2268161.
Harry Pottsau Und Der Disstrack Des Todes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dfb3854a45f9feebdaf8f41e0fbcc1bbf3a8dae5200cd898d727f6fceb2a35. 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/TCAGY2354826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd48be3e0b232e5abcb0a92e593d775e8ca5ee25518979c7aa90de490bda7fbc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCAGY2354829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0e399d28a3336a322192fdfd52e2643fbba41cbfed03950cf0865c8ca762a8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAGW2339579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d037565368253e5ae3cd0c980b523e248efd921217a0f0d1073fb98012eee70. 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/TCAGU2385690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b316aa988e57c9cad142ddca4455d677c45b6df57bbb892ba2bc2d67a29a361. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAGY2354849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98be69f0462b60c2ba50d30a7e86aef7e202ad5eac4a4a8041e4bd072ba36a3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCAHE2321319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bf745dbd4fbe5c5e818a4c84031cb9c6af65c6e116b45f64367e03ff67819e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TCAHF2386461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1a2274ff07ddfd7e2963386a7c71b2aa71324008a6d89ea3f1f2129e4f178a. 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/TCAHI2377821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f007fb31a19f4ff27ae92e67e5c7559e0e35eaf87ace590f7ee72d67fc0a27. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAHU2454748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7762156156267d9e6bd76aa9d8dfce6072ead4216435a8dbe4dbe68dc5ab739e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAJE2569465.