Desiderii Marginis is a dark ambient music project from Sweden. History Desiderii Marginis was formed by Johan Levin in 1993 in Mjölby, Sweden as a solo project. The first three tapes Consecrare, V
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c4c650f83a8fedd4df864c2dbeb8e09f7d0d5e146e13f3b124f7c84881866e. 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/25d64a05-6de2-4734-bff7-b04fd8e150cd.json and https://artists.proofprofile.net/proofs/artist/25d64a05-6de2-4734-bff7-b04fd8e150cd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6e2c57343063849fd7bc14167fe8ac61a1339a928acbe85d7723c30237af75. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEXJI0100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f78a1aeafc591fd722ef31c2f7b01829e9b41ae268f28470c609e1d7016aa81. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SEXJI0700701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e6070d21cf5dbcf18f150aae08bb5e936e0bf508f9582ee18a4265ca9f2ecf. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:04Z), 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/SEXJI0700702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc9917b0d0b79df122ae487e8b3123aa77dd6f4a3a0a5bcaf6aa6217b1dee24. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEXJI0700706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923b33a1465919aef1ccefe7128a5fc3f3e921d8df66cf73004d52bfbad8d00d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SEXJI0700707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8641c0a99dc15127fe36b13bfee13ddb53a00f90c304090858b49b3b15adc7b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFMG1515708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1717932b1fa1d0bfa7901de2a68996ec45d7ee8ad7402875135dc512cd2ea9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMFMG1515711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5c1102a166b0ad7c1c36b7776f39c681b402e025c07816a380ea4a96cd9ef2. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:32:33Z), 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/QMFMG1501456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee3c6d10b2694fef1061386ee4c1bd930fd0ece20251d16265e25c6c70de67c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFMG1501457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c91460772c50e78905d0e874eee9371485903e7065b4db6de5884479bdecc8c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFMG1501459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa6e9b70494da2d82d10edfa081db39defc2afd9852ca7cbffa474d92eab650. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFMG1501462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5a4e70539c3e0a5266d3f24bdd538e082534cebb91d9596fcc56e8f5a0fac7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM6N21859035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f339f20b49b8ea31847c70d6876d331c145c03c78741aee2131268f83b328b4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR9W12402427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad0f3cf1eb998b5090bfead8f73efb6ed27302540814f2ba42be4b9f82c1131. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR9W12402432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c0322c052f7bbab737cab990af4270aa04bb737796dc038fa00fe694cd1532. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX7Q52300019.
Cycles "Cyclic Law's 10th Year Anniversary Label Sampler"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47250594138e9e99772f7952a063230e4596ad9fbe57d5bb757094e716a8597a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QMFMG1512606.
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