Sofia Karlsson may refer to: Sofia Karlsson (singer) (born 1975), Swedish folk singer Sofia Jarl (née Karlsson, born 1977), Swedish politician Sofia Karlsson (dancer) (born 1978), Swedish modern danc
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 0x421686786e95a6a6fde9985f510f9acd53ff29c145edd644950f0c0396460010. 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/87c4aee5-9f84-4c1a-9f83-ceea31ac20fb.json and https://artists.proofprofile.net/proofs/artist/87c4aee5-9f84-4c1a-9f83-ceea31ac20fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guitar Stories (Sally Wiola Sessions, Vol. III)
Reason to Believe (Feat. Jakob Algesten)
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 0x49ae60a333f12ccb99f4cb659c10c3628a54264316c8988e6f3995e7605ffb84. 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/SE5M51900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b07ee3ab39ee350ed6dd50b25f3090ca7a6760a7d3ea653fa5a581a075675fc. 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/SEYEP1101106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b078fd6fb9a60ff2a1dfc1b42da00062696594db187c8ec9b893a056367350f. 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/DK6KA1001605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c022675661caf392f78d87aadb08801c1d6961ece3addb656d1a7a1be4d2d5a. 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/SEAMA0500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf961909a6b39ac3855c3e009c16d3265cb7823eab8adcecc8143b4cab2e6cc11. 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/SEAMA0500470.