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 0x0777745694de2d0c234d82d07c96d672a9d29749a4dc96ff7560932f887a58e6. 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/2ae43a55-2317-49e4-9a15-9427b781293f.json and https://artists.proofprofile.net/proofs/artist/2ae43a55-2317-49e4-9a15-9427b781293f.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 0x0945bacd754c1911846ba91e642148263be9ea2a89c3deaa99dcb62b45741666. 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/DEPX42200578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdbbc503365243b6d9b425718cd80613aaef53fb121b1df018efbda4b6e8275. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEPX42200575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0ab3fdea0ac88c4f89ebb6da72462ca42f1b96ca979d4a0a17c5471d8204e5. 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/DEPX42200579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b4a969a72659eb733c094392e43e57fde780dbd873a09fda9552ae7ccef5a3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEDH71600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef83e8f0da21db4c15bf6286eaf7ba434bcf4e3d9b5cba3b0bf55c2ec828a8ad. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBHFW1700113.
Global Underground: Nubreed 10 - Oliver Schories/Unmixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4263b6988736d6ca611e897936fce85f2b82a0c7b5577d59c1af2747e450b9b1. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DELF21302310.
Der Tanz der Gluewuermchen - Kollektiv Turmstrasse Dirt Glow Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e07f2d63b209aab78ffb2fcca3ea5eeaa64ec658a5b2be930bd505635fde44. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEBW21100382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9456b29648c5a0828e1167fa0b83e891598c9fa6bc1e5146a47d4ab5c8d32b27. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DE1I42300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b4a969a72659eb733c094392e43e57fde780dbd873a09fda9552ae7ccef5a3. 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/DEDH71600051.
Jupiter - Kollektiv Turmstrasse Remix [Mixed]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b4c5aa06c3b35dca31a28c9e343dcff7e1ebbdcaeda89a3e8b83e95e5ec982. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEPX42000360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820572d7a7c4fe2a2d6f6b226fcd61e09e316012ac7a404abd8bb749622d6c60. 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/DEPX41700247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da34eb2a5909e431573b66c79231559b433d42b9bccf6bd49d1325ec956696a. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/DEY470916005.
Rebellion der Träumer - Remix Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1308429a8135c765ac208a847c5a312bfb743c0f5bf9c69205474e91f9dfa6f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEY470916856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22af7f2dcb98fa3ee7ed7703413161036d574aa82329f3fba31018cfd6486592. 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/DEY470916857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca81fb7666560e510cae7f10fe678cc13984e4f468f3079c8214598b426573a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEY470916859.