Jonathan Maman (; born September 29, 1978), better known by his stage name John Mamann (), is a French singer, songwriter and composer who is signed to AZ, part of Universal Music. He has released thr
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 0xc2bf587cff78c3d7e158a1dafa36e081d848fda46ce449c5805f4a791cad85b5. 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/5502b8b9-0ea3-4f2f-9482-9d87abd459f8.json and https://artists.proofprofile.net/proofs/artist/5502b8b9-0ea3-4f2f-9482-9d87abd459f8.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 0xec4af146af579f8d54212f0c219ac5f638f2e96617f313ce31dcb06cf2953dc8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR7S01280001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a187290b1ef51e302e64383040020b822d6f920b8dc56665940f062691d6d60. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR7S01280018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025daa73dd78c84d7bc547f20d1b37d07f6a10e5ee881a2eb8f5454070f05a2f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR7S01380001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd1fecefce58cdabb8491ada73f64e62459f7902c3410be05ceab138f5f6c48. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QMT2X1400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa182c08479853f80418bae72455af6fb765b0390f6118383ce601c34012380e6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX451598961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990a7eed5437780f25618a32eb91fa716b721ca6985e0f8ab7366d7765429c42. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR7S01600361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e11999dc41738ea197c157f7795dd3f355379d2919bf346854a32bda1436f4. 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/FR7S01701700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8cc25d3fa077d7636b24909523d21a3a57930a726e8763769d9115c5e20f45. 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/FREFW2300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070044be1a4abbd2bc24e1978f03d9b511411ab43c5086d64f698b550b793d2a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/AUGBT2451174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e947d07e4816a40237bd12642bd134577fbef03d0571ccc74496af9a8414dac. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR7S01401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde253b4c4922c87645c9427a07d660598a130d9ef75b5f0649d2609b4e417956. 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/FR8FB1800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde253b4c4922c87645c9427a07d660598a130d9ef75b5f0649d2609b4e417956. 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/FR8FB1800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e7c37cb17546b9cd5f3055ae36dacef3c3e54eb1cbd65ce115dc6e65289af9. 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/CAF661900843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a079ede6a7bd0c40c47f23087ca4049587fbacdf65545e05e07f4d390c7129. 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/QZX8J2300020.