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 0x451aa569675319c4602d0bcc6fbec94f5a88d53edb1c6b8491db49ff73c3bdf9. 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/c58a61e3-3f72-43cb-9200-258b3411c4b3.json and https://artists.proofprofile.net/proofs/artist/c58a61e3-3f72-43cb-9200-258b3411c4b3.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 0xa9fc27657f27458307eab4f8bb19649f5305ef81cf518ce658dfeacab0a578a3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USL4Q1938149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ce763cace7b18838cb2e8d747719c9e593bf986adb3acf57184c00969d74dd. 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/USL4Q1938151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe30e060ab38a46fc46870068b1ae36d3afc921619b581ee710632857176db. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USL4Q1938153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddda9b774c444ed0d3a73b19f0e5bd4e9f7b1164ac0713d78a4d868ba286a79. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USL4Q1938154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8771b98c49f2e7f18a6bef93b43fd52101927cb2e15da49c99327325da07733b. 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/USL4Q1938155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2527fca9c41c376c5ff55c67038fafb5b5a4a32e278cc9813e4b0b24c5972447. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USL4Q1938156.
Nicotine & China White (Remastered 2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a1950c7d551eb33a2d674fd3740c1f931d86b0ddbb22dfa033e706e6c3a210. 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/USH7N2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5705e75d9fc2ed83b8ed7e8bee5c49228c9f1ea065c1e27cbe5d4a76b900bcb3. 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/USH7N2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b66da334197cd5a16e4cc25cc640d94098d5050bee5620aac7a6a3763469daa. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/USH7N2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4895416dfff78836a91966c5e2f06a19d42b6a628d89d67379a62491b60378. 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/USH7N2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d799fcfa4511397d84cc0bc713f735321f1d5c2de163eca07897475fb243928. 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/USH7N2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a79fd09dafc57cd072be0e1932bbd42f10ee659351043419411a0d9a575d8d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USH7N2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2781b8517e10c623c67246a125e745ef479c6bb1bc2712610e85624d9be9ce4. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/USH7N2100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26448f487b757039d2e84b78e3356726354cc6fcfd6318c0beb1c8bfa8f8781. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USH7N2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7959d8d530ba3913f25a1a5dff86521a060f0bba195899792411466f3304f10a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZFZ42229861.
Rats Get Fat (GemsOnVHS Field Recording)
Restaurant Rat (GemsOnVHS Field Recording)