Marc Johnson may refer to: Musicians Marc Johnson (jazz musician) (born 1953), American jazz musician Marc Johnson (rapper) (born 1979), Danish rapper known as Johnson Marc Johnson, cello player with
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 0xb3beced0e608b5753751e870ba55e8b2a45d38fc316365af89e3e152c9caa1cd. 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/ee0b0bf8-57fe-4d2d-b2bd-8a4d5754453a.json and https://artists.proofprofile.net/proofs/artist/ee0b0bf8-57fe-4d2d-b2bd-8a4d5754453a.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 0xe20db52c8a293f8c3fc5e30bba66a1eee55f7575c0264b989205366fa89bd8f0. 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/US29B0749230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c1ada00fe0f6f58d24a231c1f40bd51e084d7f77bd53c1024431a7cdf7b84a. 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/US29B0749205.
Inner Spirit: The 1979 Concert at the Teatro General San Martín, Buenos Aires (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e9bbdba503fbf315f75afd315b9ccd6de33b072179a7cd3bfb78b7a17f1785. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USA2P2205031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709e5f0ffc95ad96b95e5b5413713a3100ba93d7af371edef36243124348154a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA2P2205037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c401130d25fc704888b34f91255699bf75344a427a0f37aa07041cb132d58d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA2P2205033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce81e495a431ed246ffbceccbd7cb691c78941a0bddf6f1df582822fbb75a7c. 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/USA2P2205034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb43bff783287bd009fa1dec8539849420e018f21b29644872b19e563c7dbbe. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USA2P2205038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa834e85d796c92025243ef0910d9868ff55078be218cf0265653116de1e5862. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USA2P2205039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd584063579bfacbba8f490c12e7bcdfbb06328ce88f629f718b491aa176a5068. 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/USA2P2205036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767e396077bf3a7041b78cfef92b4d62b28349689fa9659326ac45d06fda5bbf. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA2P2205030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ece44cd45ee91b89f490ddb2ff436e9939937ec69a461bcfd0457d9f3554736. 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/USA2P2205029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb388227f437f6329c0dff808eac547a12cb43263387275f12ab9c2d8b8714fbd. 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/USA2P2205032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cc8de57a6b921913743c3d34c28dff6950a607bbd7d96b392a92518e86d8b2. 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/USA2P2205035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77481a8d33887e42567647d90c3ecea3bb534640e49607df696ca597e72f7dbe. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USA2P2205040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b803fabb42e02244e0200b96573da71fd1d13567c66a8d208ed31dcf220e09. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USA2P2205041.