SKRUK is a Norwegian choir which has toured all over the country and many parts of the world for 50 years with its conductor, Per Oddvar Hildre. It was founded in 1973. The choir has released more th
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 0x693cccbb9f000f8f6a58677d00cddf11e0d4a9f4bdf267465cb9bf5adf874f33. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9ed461c-9bc4-48b0-8c5c-10c74a618a0d.json and https://artists.proofprofile.net/proofs/artist/c9ed461c-9bc4-48b0-8c5c-10c74a618a0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kvite Som Negrar (M/Ytre Suløens Jazzensemble
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 0x1360548863569fafd95f2d32906d861234cd784792cae88939b62261c10c2df4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NOX9X3380202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc918dc1d6fe79944d5e70d95e131423d5e626078e344a3a6482f792b5b92e2. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/NOFKF9505030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da259e91bf155462bca242c96b4bb24968c05c0679c2bc5e008e154e15e5d3d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NOFKF9505070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d42040476b1aa3caac1cee0e15e9e76c5b1c88c66b1e241273bc689ed59030. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/NOFKF9505080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a893fba4763bef46f6055d31d3f173f67da96006cf6cd8e9f32cbf726b52796. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NOFKF0205030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bb3d1c3db0a97d4489df30917b70be3d586529906d8c0a7d45899750090bb6. 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/NOX9X3910003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ffe591858cd062c4856acee38f50142a8518b1d4df5be3e095d709ed4ec319. 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/NOX9X3910004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df746dccd041ff9f1163bebf1496aceec18aba630d30ff64d4e0390d858ea66. 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/NOX9X3910007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8173e0fcac30aac53cce3c68bb54d6677c34889e697f1d24bb72c9ed0c7b7583. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NOX9X3910013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbf72d31785bfdb7dec4d80a1e5951f66a48354736c6155c8ddb268db26bb27. 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/NOX9X3910015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbe89c22ffad07977d60e4544a3a32d61ec1ca2e000db2f580a9235dd3d7d4d. 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/NOFKF1904010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bdf5afc2182289e81160b643c651051a63d450478e1e3a4547b1d07222dbbb. 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/NOFKF1904060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69da2b0860da87503bb4a399cefad79d9ad7219498da63bacf39d6a261f3f332. 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/NOFKF2011010.
Mitt alter er fjellet - Vaerieh mov aalhtarinie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a06aed6fa9c809d1363885963f3f2dfc44f1a0729605e454ca3acd0ac9ec51. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NOFKF9111070.