thumb|Surface web in relation to deep web and dark web A darknet or dark net is an overlay network within the Internet that can only be accessed with specific software, configurations, or authorizati
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 0xa8856b8691854642ba1ccca3b04f89547709f2d4bae4e5ab8de6ddbdfac28587. 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/1c58d774-9c08-4bfe-9749-fd618593852f.json and https://artists.proofprofile.net/proofs/artist/1c58d774-9c08-4bfe-9749-fd618593852f.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 0xebc42bba6c8ba22069d57d83eb37d7fbe2e9494077f326e85b7898c31c6fa75b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCACS1641849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c56042292a5fc2635bfa18b938e66ee3bce3c570e3b5e9b315c5a073c7adfd. 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/TCACS1641850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08ccf0794c51755dd3987439c3d8f1ba4e6c5d5cb5c10cc51dc110ff73db3c8. 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/TCACS1641859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88d39dbfa08156744397703f89208bfc773e3ba173b4a60d2c9af6a68d98ae0. 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/TCACS1641860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc8a2d0dfcb4eafc735166b661e8b93c14a1cff9c6be49be012393081a3ac43. 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/QZK6H2060638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ac6cb44eefbc1cc4dfaa1283d6fcc1a75f7d1af06f1a8aec1b8c8b87e2403f. 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/QZMER2027859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9719743cec200546966b61cb16d12da28126d351e19901f3a3b268d29f9da32d. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZNWU2057627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2f21dded38c396e1d3e6138b01a022c6b138006808e4cbba32534b2997af88. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWX2056885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2da34903f454b714f2e46bed2d34c44281a45c7beb3a86cda7544e84219288. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/QZS7J2245688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb961c16a99f86ce526380ece8671c1203e78ae99f0a7712f5ac8fadf996d6fd9. 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/QZS7J2250450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6a9e450bbe29891ae23e21fb1194984a16273c112163748fc3d52b7fa60498. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZS7J2221810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcf8ec1a8e43006a096f2b741a7a8d260782a1b12c72e3b4327f52551c7b930. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZS7J2228827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b639f5caef51cb7a7fcd9099cdc966513616caeb3ad16a19bf3f004c5a0de0f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZS7J2293314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83677e58a047d53e9155c52d3589cf3ebb3a1692b0e26c96a7f3a31205ee315d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZS7J2259057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ae52876735b658f6f49709a34d329512ebfa0e875b81aefe03ca63d0d36fa2. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/QZS7J2264441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e152bd713b69ac9952f5a0e252914cc37c16b08c8ddd7d3b861519e4c969869. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZQAY2335989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3f8bde43659f10a61b3bdc9c3f0764d77686bd3c667e54ec6c94f99b7f80a6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZQAY2307578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb35a27dc1b29f870497e3d7e8a748af7e6dcad6b490088b3a77aae8381567dc. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZQAY2379263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59df98fd520fed2079fdb1825e8e8957fe154a68de78a375de9413b3a9676371. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DGA0P2311873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7be095a958da97cb7845adef24cb6b2ca886a99a577394c6b3a3c6b7936587. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DGA0P2311874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e158a1be1130c69dbabf1e0aa011a5562e842a6b546c42e1e1ec7f2a7ce4c8. 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/DGA0P2311875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6daaf0333a6f6b58b1de47ae47525a6f4a8aa25142f188e932458328662a9d. 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/DGA0P2311877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae428e3b66d9ae09132f9ac0ffd8e92f1e976113a75e66456df15ce561cb59ee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNB2493794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70f1a872b6773e7652073d815c393a15cded00bc5e7e8ea00006b721aeb0f32. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMER2436581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a8d66f92139e0fc2b5175745e2e7403c871666bc83bb3e69b3feac9e653d39. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZPLR2525067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790ca4ef9064e8a60d5e0820d94511c634b62ebacf5f7f07369d4baeae5c7a1e. 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/QZPLR2525069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd0cbe7be32082b1afbd616dd111eede42f14a742240da47a11495864c3dfe0. 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/QZPLR2525070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c322ce26e4316174059723a9978035771e029dffeba31c125df371b90178d38. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZQAY2224775.