Sigbjørn Apeland (born 10 May 1966) is a musician (organ and Harmonium) and scientist, known from several recordings and for his work in the borderland between folk music, church music and improvisati
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 0xa79834ea7fecd5d71cbf1cb94bfaa1f894f24872479768c58bc0d87a36eb35aa. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0333eecd-d5bb-44e5-b5ef-d72fc20547c0.json and https://artists.proofprofile.net/proofs/artist/0333eecd-d5bb-44e5-b5ef-d72fc20547c0.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 0x6949fa79f949842620040020437b4c212e3f3ac5017bd1f330f210380c6c6426. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/NOFGH2461010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921b1599f08d1803015952ffbc8b508586fc9132a3867eb6edd3d39406a94479. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NOFGH2461020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6988e66865ac9a9682f9f6d0aa00f40b455c210d228d09660eef2261f3d77229. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NOFGH2461030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a2a2e9acbb69cd1ea204feb1eb47f026416b4ced3ab4ebe59f3b9c1712b75f. 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/NOFGH2461040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb558127b0b1ea9e3f4d3b405adc3adc7c9810ec3de8f34cb0522ae11f5c246. 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/NOFGH2461060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daa47add7fb271e11c3fb6d9d1367a892669d8d6720ee892fad283524bfba7e. 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/DEB332176201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1f8254950c4b64d1a073e61631987fe88840948837c1d0f89bb0f66a7afbcd. 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/DEB332176202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbd739b405872f7834d42ef9456e4d75e0ceb348b5382811e8b862e2ef645dc. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEB332176203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1449565bf378a92dbbc4dcceef50a549e1e5147590073c2d4c9f7a513eadc9. 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/DEB332176204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456ea91686147613ce7ab060bd3c62dab4d44de1761fb178f7670a430f4950af. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEB332176205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4156b6ce1707a6effdfb6f191a309d1f765f59a5c1c6b17e5ebeacc90c46b410. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB332176206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e24902880bbd3635fdcdc09b7de1362b463bb421bc101ab622535b5790a5d6. 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/DEB332176207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84759f98081541716aca87200a655cab9f5c79511f4c24f843fc0bea085a1727. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEB332176208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584ffc3f25a02eee66c75d2a4cd7bef334a2c6e41e0d64460c443144178e125c. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEB332176209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098ea3ace87e7c6c0a1018993665921a43f3f413bb5f470c8a0d13284740afa6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEB332176210.