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 0x258c2d4c04ce5301c709020a7e268f411257922fd8a24f5fa1878e46e9c1a202. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bb31a73-a620-4b32-82c6-99bdef917b27.json and https://artists.proofprofile.net/proofs/artist/0bb31a73-a620-4b32-82c6-99bdef917b27.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 0xc5e26db2f5750d0a98ebc9a77e14a5cd5b6c03eab3d3603a040a15ad5faa6191. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEH742154404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdb40d671c20d9f7da6c89e3e5de3363d61461ccd96b19f7c45f54d4ebddbd5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEW872202080.
Samtosha (Leeni & Danilo Kupfernagel Remix)
Samtoscha - Leeni / Danilo Kupfernagel Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a72dcbc542942022ea08b47ea1ea2f28761f43116291029083fcf0a4815259. 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/DEU672300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1acebc0ccd9a982fd9238c1cbbb5ce3661441703c91140b2563b7599acc658. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEH742411987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40afacdb99c9d47ad6e03882b76d51b8aa4243613f0a1dbbae43787dfa91bb5c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:55:19Z), 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/DEL022480028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b6c96d106f4be86368418f9d3f130bf297455ed76b0224f2de20855b22e10c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GBKQU2483488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1ae7059345c861a2c9b8ffb5718a4bf535b2eebf66552caece5a3b24ccf015. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEH742504601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422a54b405aa15714ff9a7991f5d35509c0eb611562d2550db8624d73b306c33. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DEH742504605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756dd37761ff8d541de347b62b921c1681397623e1e839c4beb45329c794197d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEH742504598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1de7b3f1d4e583ad5bd152a3d9f86750871a0af05c54c4fe6c2c0d923e83bde. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DEH742504596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79553170b423a9f44b7cfdf956f06c25f3e83cec37aa939a7abcd29d4966ba53. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:17:53Z), 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/DEH742504611.