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 0xbc04c0b9ee783218d9086dacad825c631a74c69d969714f4a5727445a7f21077. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8df1773a-8176-47f6-b4b6-69a703c8ed37.json and https://artists.proofprofile.net/proofs/artist/8df1773a-8176-47f6-b4b6-69a703c8ed37.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 0xd82c2463fd88f8d665741b6e6047b16e79a06409e734bbd6b694e78b7d9a59d5. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBH5W1300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eba8ea2b47d3efad4539cddf2bda2b2c146076265c9ab0fb093a2dffbed2a9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBH5W1300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851da691ebb424b630040fcdd5bccd1c6f690cd2d9f15ea5be4cf265cf308b39. 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/GBH5W1300184.
Narnia: The Grind, The Trips & The Wardrobe
Your Favourite Rapper's Favourite Rapper
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28feedb40b0a6d815ba59a0fce83f5c17489230012a7cdf81fde39ac6bdd069a. 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/UKNGC2000007.
Oi Oiii Collectables (The Best Of S.A.S.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1382b5da55bcc89fa8ac7e60e627c6cefaa0dfc1e7496b0032d68a26096f1e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKNGC2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eecf707680c57cddb45457fe4c2acce5326cef4b62b29bf2411ccd5db7b820b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKNGC2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d04e48a6ee0bfdaa55cf38949f1314c3ddaf990797f68dcf1cb3fa15296a1e0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKNGC2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a3b2c6dc90c784f7c446ecb90576aefa1e8a5439cc94abbd5f3b61dab118d9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKNGC2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28feedb40b0a6d815ba59a0fce83f5c17489230012a7cdf81fde39ac6bdd069a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/UKNGC2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758fd25d1487ac43523e8f9c023c040709ebc755ca2d3a2eeb797a738de6957f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UKNGC2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb18a1ff7f59b38631c7806b18a298f13eb671a3164b9105851cc87221a991c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKNGC2000024.
We Built This City, Pt. 2 - 2020 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f7b0684fc32d90f20d3f273276a317dc09d444078dc25a037af487e747e605. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKNGC2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a60915efaf5eb065e79a812cb7ea0124af7568189c5eb4575fcf06a740eccd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKNGC2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7aec68a1c92cc2a462d23f5c86c2b93f4c26656b993fe25c6882155f7d3f07. 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/USUYG1340640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824bf2a4a1726e97584bc568180def6a6ccf44aeea2d819a9fa07527f4908a33. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKHF72400042.