Gustav Lundgren may refer to: Gustav Lundgren (musician) (born 1980), Swedish guitarist Gustav Lundgren (footballer) (born 1995), Swedish football winger See also Gustaf Lindgren (1863-1930), Swedis
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 0xa74e957051ba1288a06f6291f8f66d8673620f134d6dec8820805629e7ca088d. 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/70710dae-af68-4e66-992a-14cb03723b07.json and https://artists.proofprofile.net/proofs/artist/70710dae-af68-4e66-992a-14cb03723b07.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 0x664c44eaae4c57af95b1bf59dfeed5b406414148ef5f2053d50275458320e999. 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/SEXMM1400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfbe4bee9a57504c276978af5e2c36f071631b089f501c886b63795ab4e22aa. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/SEXMM1700307.
Gustav Lundgren with Romain Vuillemin & Edouard Pennes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985f23d4d264c1dbf0f0a40a99fbe125073c13b6b55cc6ef02018df578ad81e5. 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/SEXMM2200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e024c48dd0eea5c19ac92ce11589f2303419023cbf02acb77d96a43334be7a9. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SEXMM2200301.
What Are You Doing the Rest of Your Life?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a7ae90d134464bc5fcd48922406a6a98871401681df446b92622875592d8e8. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SEXMM2200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6a484cd2a8415bf10294c7cb49d3e5eb750445226bb30477669911312432dc. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/SEXMM2200801.
A Beautiful Selection of Songs from the Jerome Kern Songbook
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afa59615379b9d1056f0d0724527552decf039feb5d0b7e33324d77c79af4ed. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES7712011002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37f71e4c5d70ac4ea59509eac76b45533396aa6b7df9c0d69681a942dfd6f7e. 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/ES7712011003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b47ea96b8fb11168992e0ffc90ba6b6e539d4912361ab4f0cc1d9054922ebd8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES7712011004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff60392094547b3d2bf256cd2fa00b3c3ed4514e29b07e105f4c08d6daf189b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE6N62200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706a6b42c8ae218b13ff2e4a8d726b93bf4bdf794e195fc45428109a4b490451. 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/SE6N62200525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcd1be4333be624df9f9e87a019130a0e505f4a3f87a776a2e7866b81996221. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE6N62200996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249e16e7e4cae4460604ac099252b206833187aa9d5c0eac769de5db42c00dc9. 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/SE6N62201324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6566c976829c61dd1e8f8d4840339c414d528593887b8ef37fcfecfddb18be2b. 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/SE6N62201464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80422cbfe5f179d655e8b126bcfd18e9e97e7a233307b8fb3db21c52a3950dee. 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/SE6N62200769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15d668de430ac1767c3ba8a18362f5d4f55ad41c2ab5721b7385071aee7eb38. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE6N62200673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304835d727a0dcd5ae3456446cd8a2cf97ce7c28c270f07c60a20bc155017996. 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/SE6N62200859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afafb12e2d1b6b680014d94e05f93e6dbb068b200fd987a1db772aaca825ae3. 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/SE6N62204241.