Curtis Lee Mayfield (June 3, 1942 – December 26, 1999) was an American singer-songwriter, guitarist, and record producer. Dubbed the Gentle Genius, he is considered one of the most influential musicia
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 0x9f152779e1e8d122e23a08e7e09c2886d4fe740e9ae8fb1b58e9785048146377. 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/26435bcf-3a51-4031-b734-c9789195996b.json and https://artists.proofprofile.net/proofs/artist/26435bcf-3a51-4031-b734-c9789195996b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
(Don't Worry) If There Is a Hell Below, We're All Going to Go
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 0x48a42646137d2fa07dde0eb8c1ddcd7a80b2ec06ac27bc6420d17eb7f85679de. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH10401526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ae2a2f08eec5218661d83577f64ea66f1e3321ee7acc127e6dd9b9b94b15e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH10282845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edfe2e2f7835e3caa3f31dc663b3289db51e7c6dda8e9d416d4885ddf560852. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH10282848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf172a74e6fa5e0924aed5a8cc7584adc05e3f8eee257993e67153650efe8bbf9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH10284928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35be1a7845e00199c0c28ac38cd39de06af74ea1ddef2a8d57b781ca177caeb4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRH10282844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3c598beda6c6b73b365aa6be65ee72ae030b8b91dec0021ef3abc88362789b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH10282843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d25c6822406c73306b31ed018fc6c00750e8ce032b82c3763270b40d0e3f2fb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH10282645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e76317a23ef58bfeb87faae98ddc5880bc65112aa8d1a9d1c2bce25e3900c5f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH10282846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68db4516587589348260303dc13b7aa9b4fcec30b7fb4c9b46f0eb83f7074fc1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH10282643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e15a199876bcebf4e1f3b9efc0862c1f0125dd29d092715c63c5758f9e3634. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH10284929.
Freddie's Dead - Theme From 'Superfly'; Single Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18e87fae6b4e53ef41645f44638707e2fb3cd3d6281e2f264456d87a25a3d75. 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/USRH10282842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd837fcbf29d4244e78a421af186ec26b6a26b786288b5f704cf2b15cf91f27ad. 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/USRH10283404.
Semi-Pro (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d177c1717756d351d503d5d9d981f63535a55d1a4007a7f4b9353deb9b62b0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRH10401528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31eed5a743a32f38de47cc5b495926e0908d326ce2c62b098e689afa1abdc895. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USRH11509321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31eed5a743a32f38de47cc5b495926e0908d326ce2c62b098e689afa1abdc895. 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/USRH11509321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31eed5a743a32f38de47cc5b495926e0908d326ce2c62b098e689afa1abdc895. 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/USRH11509321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8638bfacc389e88bcf0022654b82071dfa34a86dd88734c7a53a8e4f97241ec1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71111693.