Marcus Schössow (; born ) is a Swedish DJ and producer. He has also produced under the name Progresia, collaborated with Sebastian Brandt under the name Under Sun, and lead the group gardenstate. In 2
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 0xb5a2a98cce24463e29aad2839af351825d051cba53b154cf3cf78eb4d7dfe9c3. 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/89d2792b-9539-4792-a807-c034b2cc1c87.json and https://artists.proofprofile.net/proofs/artist/89d2792b-9539-4792-a807-c034b2cc1c87.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 0xc29487ade02050755d33a8e7a0d9c9a08b512a41f61d36f54fceeae8ecfc7f77. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBEWA2104050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca05b490f5e4c07464a30bdc4d425ed2c722ea180ff9a5aca802dff788c57718. 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/GBEWA2200850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955e73cee78032e53d6d6172172236413bb3de80d2b3049d501b6ec6ceb9b993. 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/GBEWA2102730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de8885da1aa8b46b8ba9517ba98008124f5ca7c04aa47556bf13fd3d735e17d. 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/GBEWA2103570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72b10a3e4cdde2003f2e237f1ea33ed59080678aa7e29d9f58cd4b500e0097d. 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/GBEWA2103571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1665f89728da34ad1ef0d8ab40851c990e6bd6adf791507e29d41a29fa885e18. 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/GBEWA2103572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc735c75b6af771b051e32115eb95c8326d430663819965aa4f7930fa91064648. 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/GBEWA2103574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d24e6f50e9d8786a7f7e96a3632cc051f7d5bde691649002490dd1ef0473b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBEWA2103575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49f67e20490d57b5680e21ed006f369bad59179a3e870e45e3aac26b07ac4a4. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBEWA2105453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c218aaa64bb146c180460e491ae1876e7c892e6ce958f2b51d8d94746071ce. 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/GBEWA2103576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cb0e83dbf74e77f3ffacc05cdcb99ff1d01fd0fe81833fc26042c17ae916bf. 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/GBEWA2103577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ca658e2dd45709fe0996f4e80e5bbea388b9dc8da23658eb814b780d511612. 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/GBEWA2103578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd71b0d6cdc834cbed18dbb1d546e96363c29148dd55e2c4b349f4a44530dcc. 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/GBEWA2103579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb803fa6e8797c45220297939a5acd974053df14e7d4f6c85424fb3e7fe0947. 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/GBEWA2103580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df86a8aee9b6cb56427038fca9dbf3f5cce00ecafcc8f6de9e5bcd4c202e9e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBEWA2103584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7809926033c6604668cda71917362b2eae6e23d0f49bc8aab12ae340488b87. 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/GBEWA2103586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb5c8733c372024b597f57f0ae6371a121fb2da992a16a9a0aac0d0b793e36a. 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/GBEWA2103587.
Tone Diary Presents: Ukraine (Mixed by Marcus Schossow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc424783ffc022de5470e1f4ae6c8bbce2cc180c647630777452a50b980328831. 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/NLC280810002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ffec1a1be7bf0e3c9c75ab8f47cbd9f99c8eb09e2379c98cff9055abc0f654. 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/USYBL1801222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d147396e3965a4c93299aadea04d1acad312e18536287859b3eb417c8a3b00. 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/ES71G1833459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e131fd36c48da5f1036592eff8ac63f8d3e7d4c4bc99ea2e50990e3e2ec8ee. 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/ES71G1760269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634b6833d41775faa5fcbc2643da4a7bc6766452c985619ce7b2d71cac08f3d3. 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/NLWV71600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93ec2e650e6ef28f2d704a862a6029b5caf0fda9e4cf8fc94c78524746e5714. 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/GBXGT1500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3659501f68795d1b58e04e9e948f7c8b780726d54cd90209f5dd357e91f9f2. 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/NLS241500360.
Lionheart (Marcus Schossow Future Groove Mix)
More Than You Know - Marcus Schössow Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb83c397a4441998a96bb447b84256de61dcd367a073183e591542a997b6bef. 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/GBUM71705084.
Sun Is Shining - Marcus Schössow & Years Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2b4367f2279a4dda26aa570fbcf4e55feb14a3ea6a6d4aff8106b59ab49a83. 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/USUG11501011.
In Search of Sunrise 6 Mixed by Tiësto (Ibiza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b00f3379e6f97d9f473a10625c1c784ffb7a2076c92364064aea29e78d2f27b. 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/NLD681803003.