Skar or Skår may refer to: Surnames Alfred B. Skar (1896–1969), Norwegian journalist and politician Hugo Mikal Skår (born 1978), Norwegian actor Johannes Skar (1837–1914), Norwegian educator and folk
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 0xe5254f19a33bb0f11fd485cb520d1e020a2e57f627a6a64f4dc7e07e960a06b4. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f67bb4dd-c5b8-492a-9911-1ff7ac697b12.json and https://artists.proofprofile.net/proofs/artist/f67bb4dd-c5b8-492a-9911-1ff7ac697b12.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 0x707345b4fd7b2ebb260be48b154f5b68ad0c29c84e022ca85a05386d357a1e7b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USANG2289908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cce41c3dd4c062ada31801697d77fb29915245badd7130f34a985cb624fbc7. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USANG2289915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6c8a12b9b4f3b26989cd89cf1a8a5bfe940cf2e04615ff51fd659e9756c265. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USANG2289919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecb7a99584a6d956f84a6e4347bd14e5e211fc50b4ec12d668ecc190566e517. 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/USANG2289924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93df7c69368688f3ce34a85df5176981b54912a852e55b592368a58ae8282174. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USANG2290018.
Diana 1+1, Pt. 1 (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d3363e217f0ef7a6084f2cad012563120d2af1e9b6dec0b98edf2b41ee3b06. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZES52165242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d744220ec9bf50f1a04aa9dc657e36b261472bce571fe960b4437185a544bea. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US3DF2455822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a45827bdb73c17c13badb5ea4c7f91901b727d2280c87182542f74ebc4baa2. 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/FR9Z62400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26d2ab6b1a8586cc50d2e99cad5fff4b1a127eb4a32cc143cbfe4160a68ba18. 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/UKZGC2308141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291da905c7545d199aaf4253923a9d68b31117bed332516a3c0fff268b73f305. 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/QM3DF2205971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dacf5c99b915e9884ca6d218570be7c87701aaa63e2b0d23718715747f067ec. 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/USANG2295784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3587ad734a0147be62153d22a61775318cb93225d1dbb5a2ae25673c790b6b59. 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/US3DF2259335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57515f785e398b05c78a6ec9b82d3dcddce15c777d1f748331146f50a48519f1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM3DF2202940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ec348cb1ae69606c9b5a8bf21941b424d7b3cc1f857570c9fd12fa2aabd754. 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/QM3DF2255119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00d7dcc9b8c264c8fa587e1bc527708668fee6f53050df99102e9c3389bf33f. 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/QM3DF2202870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291da905c7545d199aaf4253923a9d68b31117bed332516a3c0fff268b73f305. 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/QM3DF2205971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03e0f77e89d4a9f05eba2e6410131f7f1227325bbf12953f5bc59aa7c2b5f44. 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/US3DF2455798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54808f57b1f80298cbe14a7d782e9deb9cf0522976cd969f171c9f0e690f5692. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US3DF2455817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d744220ec9bf50f1a04aa9dc657e36b261472bce571fe960b4437185a544bea. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US3DF2455822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb615f321ceb05ec92be3d363f10c5e1c17dd99d12c86e0861b1f402a37439b9d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US3DF2455824.