thumb|Litus Saxonicum (England) __NOTOC__ Year 290 (CCXC) was a common year starting on Wednesday of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Valerius an
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 0xe15d8c34c5cdc5bf66d31725aa5180d80d501d4c5c3218b1839a9d740449b4e4. 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/4d261aa5-25c1-4dc7-81b7-9f2c1a818c44.json and https://artists.proofprofile.net/proofs/artist/4d261aa5-25c1-4dc7-81b7-9f2c1a818c44.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 0xafa4c878374eb1a4470b3b0198741cbb0d9c09855f94871a32171566613470f8. 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/QZWFP2327317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb333f3b232feeb72a6f83bd98c38e06d95064239c2ca4e589ecc4dc9dd6af2d4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFN2362357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceed4647a201cf698d5a71f088d2f5b6eea37beb9f065a1920616dbed9554f6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFN2362358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a55b6048a10ab4fd745b3008a76f88e34526325486e36bbb6b2b1a9ea31c650. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFN2342891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e132de0488a4444b77ef79cdcf6ce8bacfacf6fe16e46a2284ea42b81472728. 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/QZWFN2342863.
Chatsarganan Ayngatai Tal ft. me69en, @baatarfly
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8522a1b42505e5d788d23199398e0910f18a4372de139a6a4b351fb90a994df. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZWFP2327328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116a21cdde5447dd7a7edeb73f0e55b99ae868756211b4e5035acf19730a5b48. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:27:57Z), 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/QZHN32386230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8a8c2aa482ef6b6355887cbfd1fd7739bd9cf2841a269d7d455250cfdadabc. 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/QZHN32386234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb466c2481b30202205090fb5af9beaae1b18ad161e98f2f694aabc3fbf44d7c8. 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/QZHN32386235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99a280716147447b449cae1eeb884742ab02b2645b5b76266de2381b4481400. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN32386238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f3909667060517452901802c97766593569dacf83591984917131d42e2e724. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN32386239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b958191b700f0a3d6b52d7c333aba2e5765653c0d00da97519a74c1a4c2b656. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN32386241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6701667373d2b57d95a4588ec300eeeff7abc92afb9a967a0243be01ac8afd18. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN32386248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cb9abaf0a05321303bb303103f2e07fe77b602c42a2d63a3e09a0c7c7f1dd4. 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/QZHN32386249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497d0c29c14e40cd0d2a9653e48301a21c1d88ceadbc077620053b70fa6e6340. 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/QZHN32386250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8b48816cdbe362a51d9631d7a3bf930e324b271c4f1ea54aa700d83ca567c2. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T12:01:34Z), 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/QZHN32386254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cf631e3366186fc72fe149bfb2a7f34a42912c492605add25be5b0a2f97159. 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/QZFZ32487258.