Eric Malmberg is a musician from Sweden. Previously a member of the duo Sagor & Swing ("Fairytales & Swing"), in 2005 he released his first solo album, Den gåtfulla människan ("The Enigmatic Human").
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 0x2e3d77a2830589da4f370b2901e67f5f8e4d940de6b36a7584b78db5963ab647. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c1d7109-7f47-4d4c-994a-3a3897078a2c.json and https://artists.proofprofile.net/proofs/artist/1c1d7109-7f47-4d4c-994a-3a3897078a2c.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 0x64a5ddb636e51894adb8dbc7e6574705c8a295662a63c084680dfbe6d69edefa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWQN0700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e76f589fb6d35430c14618334f62df9791ab11ada5bb831646e7db6a8e217d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEWQN0700304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f88a6c248644ebbcc0155b6e83450c4c378bc77f15c534d249844841756c8c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEWQN0700305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968d4f4c91b723cda69f3b4a04d9c22b1dcf6e0cc0856392786ba9b5eaae8a4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:23Z), 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/SEWQN0700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27598e130456417842d02380f76930038082d804defc9d19828b25c18f4e799. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEWQN0700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e3c1122f15aa2d8080c6e8975f0d5f92820b26f29e07fc567cd8339ea75f7b. 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/SEWQN0700303.
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 0xe2c1a1eb4689c1a073da2e9d06c1be1bea65823f03f8789c4220658513565882. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEWQN0700309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c688ec5b964af60c3e9a22996ff491b302e6071e681332d66ef124e1d778150. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SEWQN0700310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9641244af54bf83c0dda81052a5aa6a88477329d9ffaefc55a155ec82c07b33. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEWQN0500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e2bf3271f6783a27ab7591cf35abbff5f72155d3b3220b717f8e78fc5381c5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWQN0500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a8de669fe97dfab32ba0c2678335b803ae6630fbaada1686b30c8fce1e5f2f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEWQN0500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1ac6e1a85b3d192fb62b47d673c5f92370158ba0d41ab8f98f20a5ee81526e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWQN0500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac36f646370e120d372f9397530f6d583f09370b8b22a304e8c034f9af55423d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SEWQN0500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff5c586d34804a331f3daa8c48ecfea762230272a9f14455f2cc4718d3a1275. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/SEWQN0500307.