thumb|260px|Aarhus Festuge 2008 Niels Skousen (born 28 January 1944 in Cologne, Germany) is a Danish composer, guitarist, actor, and poet. Niels Skousen is married to (since 2003). He started his m
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 0x79e5a0e3be0e59a59de727a21720bd635e6b6582ead40e3e4e81388571c67a15. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f60c722c-1eaf-4d46-be30-8ddd3e87ec9b.json and https://artists.proofprofile.net/proofs/artist/f60c722c-1eaf-4d46-be30-8ddd3e87ec9b.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 0x3d20c51f8fe43e3df54ee97637d7b07edafbb2e0a9318f2955290f77298e7ce3. 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/DKI9A1400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89498696f115aee9366be38dd97054e62c33dc18f88cf31989cecf738c7361ea. 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/DKI9A0600203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5513f426c60042ba6092acd2665267cadb394f89bc04e61e592dc2ccc9269695. 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/DKI9A0200102.
På Danske Læber (Leonard Cohen-Sange I Danske Fortolkninger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2301f26d9a36d290acca77cc9fd77bb92e0e52567f45a0862c1e695865beb287. 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/DKI9A0400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50731c2fb2986fbdc32233e8b1243ea6fcfadfadf56d9e8f72f46716b3374e1. 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/DKI9A0400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3015c06a08b58c04123af5fea32c03b95b03119c8523bf6fc9731a883ca41203. 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/DKI9A0400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82e2ad9a465c5b5ef87c05d7e317042e0f0aadff7dee75c06b24b6bed8f0e36. 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/DKI9A0400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7601b7f364ed67709cd00d70e1519a270a1f4652bd77343a05414b5c971e5afa. 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/DKI9A0400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026cb398eefe4e806f53a695f37838cd1f4d4dc771c76c31cdf6d878383a604d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DKI9A0400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fb2da932a7c4320d1198d61e0634ae001d266bd38d04e9baf701586784a8d6. 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/DKI9A0400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba605440e1131e3ae3e9f3cd5b05f1b60632297f3ff919a4f05adf413108c646. 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/DKI9A0400314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b552c8b14a659159ed30a35bfa916c490934b28618786d269393f315b7ad1dc. 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/DKI9A0400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f34b2763476c0384f3daf130454f621201a87f967cff6a48e2fba9de4b4c3f. 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/DKI9A0500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ffaa274279cb984c756ec461dd7b17d54d9bbd4f9ca26a5e8023986f7a0de7. 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/DKABA0502101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1a9d477c0ec15db188eefa20485084cd7edde5da7e164f3f989092331aa17c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKABA0502103.
Det Er Sommer, Det Er Sol Og Det Er Søndag
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcb9ba6b9aa1ee8c7dff83d50c11cef78998a04b63cf3775fb655fe7059a2cc. 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/DKABA0502105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c232821a2d94bf08b601c10cdbd4434c74922cf655fc099397367a027022de. 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/DKABA0502106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c5e017adf35126b707d584c917f0ab01a8a99560392759610b03554b429cdf. 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/DKABA0502112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91eaeff7670e7ec5c894f965b01c77f2715266c11994ffba948617fe7e59beb. 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/DKGXA0700116.