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 0x0a6abeb5badf101d5023088bd64513b429588c1c3ed7af43fd839ef4eb8162ed. 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/5cb8c25e-b346-4ad8-a14a-4459880d0cf7.json and https://artists.proofprofile.net/proofs/artist/5cb8c25e-b346-4ad8-a14a-4459880d0cf7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Portals (Robag Wruhme Saneta Dwas Remix)
Portals - Robag Wruhme Saneta Dwas Remix
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 0x73a3df958e6d45cbadaf324de0bc0b1469bdc3950cf4d4cba2cbe142d497a39d. 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/QM4TX2424834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15516bf3182598d5c5faea63185ef7995aa5c512bedb039d678565d0fba5ba2e. 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/QM4TW2460562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeab3788422d15f19ab787a48a2037e05d3a8ba6b2d5615f44545faaba6ee83e. 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/QM4TX2424979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625dfc3a645f71e7c2fb4056efe73fb3a7f062d5ed92b493107d65a05411e3ea. 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/DEU672002181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e51dbf1f417e550c05993174d73e8c90391c52b7bf56e79c4edba27aa40b981. 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/GBAJH0600793.
Bad Kingdom - Robag Wruhme 4/4 Edit mit Xomlopp RMX Schwanz-014
Bad Kingdom (DJ Koze Remix & Robag Wruhme Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738a8ea1b84f7fe1fb3df375a75c84017dc1c5a4cbcb254f7229446458467df1. 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/DEOE81410113.