Fiend may refer to: An evil spirit or demon in religion or mythology A person addicted to either a pernicious act, a cause, a hobby, or sport Music Fiends (album), by Christian post-hardcore band
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 0xfed726cb1b6861b9ae0ed9a0dce205fd0d4da708e71d2b4b8952d4bdc82b475b. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/078fee28-e719-4e87-b418-65264eb13ec2.json and https://artists.proofprofile.net/proofs/artist/078fee28-e719-4e87-b418-65264eb13ec2.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 0x85fbbf03ec85d9a4a7fd22573b2a63148cb594b0b9d48e26b505f20a47e8b902. 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/USQY51115361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c58f2ce6fa758d6a3660baf6765f92c433f0e12705821323ccd6e4236111f2. 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/USUYG1080024.
High Class Street Music 4: American Gangster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c15b204251402dc5a5b48b4ac8bed238ba48ff9a996e3dafa08ad33950a8ae. 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/USUYG1092159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef526cfb41eaa16b7ba429108dbe202aa5b93d4180b00f38e8b72487a9cba585. 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/USA2P1478868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa82c4f37d4b83c0fd9aff4ebb850b4bc8947fdf4e09589d33e9f1a0d9e3bca0. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USA2P1394298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37362e2092289d05a6439c0a5d2a45be0cf1145620f8322968a3c0d5c4e6d94b. 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/USUYG1018808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26bcee26a96ede379447ca27a60ff2a8ba5247392cf8f0cf842f1df8577ecce. 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/USAE81028833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde555559450c7b3ea9a7d3bdb509e37b384e8e0b9af1ccbe0531ec391fe42d3c. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USA2P1394821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0909960c52f24731b698a423e094af856ef138e30ee3799f838eec986af17d2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USA2P1283176.