Ulf Nilsson may refer to: Ulf Nilsson (author) (born 1948), Swedish writer Ulf Nilsson (ice hockey) (born 1950), Swedish ice hockey player Ulf Nilsson (politician) (born 1945), Swedish politician an
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 0xc27e82f8b1ad700d3a9a8225eeb915825301880b269439a82860942de7040d93. 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/db682a79-5db5-4574-9ae7-e8e3078383bd.json and https://artists.proofprofile.net/proofs/artist/db682a79-5db5-4574-9ae7-e8e3078383bd.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 0xc3a23fd6df4964a39047ec1ed46e41eeb01229fd2a19e3b53def7183c60e4ca1. 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/SEVWR2206601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b03974247b6cb1686f35755456ef9dcdf64163fde48592b65721a061ab9b2d. 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/SEVWR2002001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5242d0ddfa17ba83295a10aa1935fd3682f6e1b9f93b9d3f7b2221fc9e89cc3. 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/SEVWR2004403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef3dede1a22a798c5195bcf8f48f4b2d8a66f1f61fe42296e2619fe41bfc731. 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/SEVWR1907701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac1b0c123b36bdb5b28cefa8b9f1f05e7aa543294750b8752a770e0e9f66f65. 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/SEUM71302039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0810e1c2e3a76e894242e9bf9de96c841bb9f66016d7d1da5670319ae26a98c5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEUM71301560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb08b76484b880424eebe6da63feb301287b193c3e9c9aa57722c158d4b95d48. 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/SEUM71302041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02427973f5e4fba743e01bdbdc7c8ef85bb9c89207d25e840f09b99c5fdc801. 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/SEUM71302042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca301f9765f23325c6e3a0c5486859d9d1c7554f0fbe153f85254d681880686d. 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/SEUM71301283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb002be80ee418e38c1a3db4c655dacc9a060ec513f44b24d626d37f39a7154. 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/SEUM71302044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f07c7a42503ce3ae74474c052f83e303674334787b26b1d84c8d2c5d78f6d39. 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/SEUM71302047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0fac80e79e2c9f9eb8c9ce0ac06f1d89611610e5e293bb585d2e62ca70a62a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:19:37Z), 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/SEVWR2004408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b7ab86f63206b396313be2cc167da1e4e545d4569dbe51403eab7ce787f8e4. 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/SEYOK1769744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee9573b312ff6489d0e0351c981f56f594a355afe5b5115a2d0486f2041ac46. 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/SEYOK1728987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef3dede1a22a798c5195bcf8f48f4b2d8a66f1f61fe42296e2619fe41bfc731. 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/SEVWR1907701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127f1825291f03219fd9474fd3b15c6c375c369c7f24109946054d84184351a8. 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/SEUM71500518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a34571840edf6ced99ba0aa3feef3f818d4614cb0afe228264f218ca87d9865. 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/SEUM71500519.
Little By Little (Lulleaux & George Whyman Remix / Extended)
Little By Little - Lulleaux & George Whyman Remix / Extended
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6fb1bb83e6354d4aa553d0c6f57f8e61195059aa0a924b31e6f26b43579e83. 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/SEUM71500357.
Little By Little (Lulleaux & George Whyman Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45589edb0a2ff50005aae5d9d31865809fdda2eb2000f52adb50e98f659663b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAUM71701753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4813f0344ec7aae81918d1eab4d96117f737f59174764ce9ac024f9edfd39419. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEUM71403708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359b3278f4d859b9d44c6dc3a21cc3445c9f460ba6504d6dac5d0cb8ea5b7525. 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/GBUM71105393.