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 0x55b501861135a19238d08e3a63f0fc6715911f3116441ce11dc75ab565246ca7. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7422d679-4ed4-4fc0-8aac-d9f7fc7773ed.json and https://artists.proofprofile.net/proofs/artist/7422d679-4ed4-4fc0-8aac-d9f7fc7773ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oh Yeah Voll Krass - feat. Lian Ferdinand
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 0x8e0d6a4bb2408c6ebe7a06ff7148cf6624d34386d67a27e14011c5bcc82e3de4. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DEPL91214012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fbea4d02e1b01704d363e1e39d50b9c53e743a9fad7fb36ff0dde61d1f740c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DESH41700285.
One Fine Day presents Pilocka Krach & Dear Reader feat. One Fine Day Kids
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03391f3c82305eefabb5038a52d371103e42c5301c1831aba3a7871fe2a2d43. 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/DEY471611832.
Sublime Frequencies of Cairo - Pilocka Krach Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c506267815b0cacac47d68cec9e2734630d5304345129e4753d5ef1dabca1d6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEL022107018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d6a4bb2408c6ebe7a06ff7148cf6624d34386d67a27e14011c5bcc82e3de4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEPL91214012.
Kater Blau Konsortium pres. „Give ‚em a future“
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20796977fcf0affe2df1c0602e37855c07a84a2ef520a0ffa23e014ebeb5c044. 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/DECY52000971.