thumb|Albrigtsen at Notodden Blues Festival 2013 Steinar Karl Albrigtsen (born 4 January 1957) is a Norwegian singer and guitarist working in the genres country, blues and jazz. He was born in Hammer
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06118ab59e6280bf66e7663e7b3db614b9178b2f2c13072dde0f5d40151ade2. 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/a23d2337-3b9f-4388-a0b5-669b2189d431.json and https://artists.proofprofile.net/proofs/artist/a23d2337-3b9f-4388-a0b5-669b2189d431.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996d0088c80b43a5edfccbf56cc8bf774eb37d8ea15947cb900be029dea01c5d. 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/NOFQP9443020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811a4d0db36279ce7925bba3f4d7bc67335cacf96d5a383dc5540e091fba1f5e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOUM70702360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5012ea93b760f1334ce6dc589422440ee0fdf40e2615809f4a42d8575ceb061. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOUM70702365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc274946739475e4a1ace2b79fae37f1002d5b1dca3fa163a942f819879811b9. 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/USSM19901251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2b242927344fb77aa616754e84f0ad603538e77903cbce27967adf776baa1e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NOAMM0125010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b06fce0dbfebd4c04599010cf8c1f614e6da2a0b1c3e17946ec0a97c48b9749. 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/NOUM71800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dce8f5a4dd1588bfc9fc62f3adec3ca5ceeea5aca72a7edb726d44b12f85e4. 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/NOUM71800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adc8b8c9b7c4fa63f69c0e4a4aaeaeddd9bed2a74cb2183aeb8a94f9dd806d2. 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/NOUM71800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e56ad498c748ff970c3aa631c8d9e0211b085f28ba48fcc8727497bbb6cad08. 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/NOUM71800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710ca4556e9022bcf6f374c6a3ebc25459930953b04bca7b08df7065ea0e4ead. 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/NOAFE0016050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe12da86b7b565de5fd304602121a965253423d2e7c06b2fe917d0a1d736fd32. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOAFE0016110.
Falne Engler - Kris Kristofferson På Norsk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09203d8c4a0ab8e637fa791d81108e797840b7111a6ba77c36fd2c77d263b54a. 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/NOCEM1367070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f9afcbc285cb76a611df8be8d814bcb102aa074b0b0ee3d91e9fd1138f6d5b. 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/NOCEM1367100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c553a02bb5fd6c6d7137fe63429d2933c5a42ef3dad5a74c9c8c0bf35fd0413. 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/NOCEM1367200.
Brahms vuggevise (Fall til ro lille venn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada15b1114907ce1854df44fa810f19f4c16a3c61db846cd168359fe798cabf0. 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/NOCEM2041010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17b9b2a8112fd9cdadc2e462ea5fa12138bd29eabb3380ff3df23ee10e012bd. 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/NOCEM2041100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40572ae63b2437f13e618f9eaec1726141efd8b6d42fc19f78c173c19148e0e7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOCEM2041120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bde504277676b03cba68793a9b0879e7154063ccab321b32fdaadfb414465e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOE9A2501010.