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 0xc34a32da4f48dfa87c81cf03d8565e0519770af78c63cf47a035ef52d3525c59. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/264f3b5b-8a29-4426-9600-21fa87ebad28.json and https://artists.proofprofile.net/proofs/artist/264f3b5b-8a29-4426-9600-21fa87ebad28.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 0x9609cd371da0a0dd573eec78c852bab6723a53d2cfca0e478ab3e7f528d74869. 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/PEBQ91897007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4ba9055d38812e6cbeab2b13230bd0f4ea89e767422202c1fd0fe42393bfaa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PEBQ91897008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b94ddc1a98d218431870fd2458e74e1c0c67cb1b04d502c7ad9deee4c17690. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/PEBQ91897009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8f4dc483f2bab87ebadf33294d183e7d28e6ca2078070281068afa200c6b3d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PEBQ91897012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfaf5fe6f13954cb486d4ea9690d5abfc486056996db3b479a7457b0e97d225e. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QZHZ32166125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a8954580ad5805eb0a111d0007dd1e57a3a454871ad35c49e0602367746736. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHZ32166128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0f732c7b0156c292d23f8ddfeb22357aaac1ff68d16960e99577c418855589. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZK6P2215778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f6274348be754af81756b8b0de0653b9802a5c26200e1095fa5f5a9c6a6aed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6P2215779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c25d2b011521ea10b2ef5298a91b785f73b80bd7307fdd98810de626febaa18. 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/QZK6P2215780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94d21c515f4f53625a3788f0c71d1bf5fb49921ddab758ed4be60bc48336df1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6P2215781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a9ff7eb949ec128c6a8cbb5a634d916c2ace655fc0c81f7c483ad308a6b9af. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6P2215782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac915ab68ca2cd8870568738bf1fff50f8380da08db2757d808244b16fb2541. 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/QZK6P2215784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e111afaaaac8d365e4885286c5c4317955ea811805b53b97198ae24e6b762c. 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/QZK6P2215785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cc2619f5b79293443d84a09c0a4cc38a78fe1423447866fd682950449200ff. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USCGH2329435.
One Scene Unity: A Hardcore Compilation, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e2a1f66aaa999297a17e39fc94a4ddb18cae4e0c3d266e6d2854a336e11bf4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBMJG2115784.