thumb|250px|Sys Bjerre in 2010. Sys Bjerre (born 15 May 1985, in Vanløse) is a Danish singer-songwriter. Career Bjerre broke through in the Danish music scene with the hit Malene in the summer of 2
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 0x9a466441fe5319a7ddc6d24b36b3464e1ba2d51b1027a9bb261e7c3ac4f5a689. 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/8420e2d0-bbc8-4dca-8231-4d6f0434e9dc.json and https://artists.proofprofile.net/proofs/artist/8420e2d0-bbc8-4dca-8231-4d6f0434e9dc.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 0x84d2f3763092eac52f80fc500b9a5970e1c1c6617406ebc25d978bfb7857c6f7. 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/DKBR22002301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2d7a69080464de0eaf94184c8299894846b4f2da0ffd6a3c0ae3d2c3def1ed. 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/DKUM71100355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606318642b7bb9a29bc753d45e593af608e2ddfcfb2c68592ed89538790df8a1. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:54:28Z), 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/DKUM71200768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f9879c841fae136bf189383fb054f4e59abb09d40476865cd4775b1b587c0a. 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/DKUM71000538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfbfb04a9521a129f6aa8946d50644f07533e1ceb075bfbbe031df185f08b73. 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/DKUM71000913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ce55b60660fa9173ae083c5b32aa85eb0bbce295a47261a008398341d47f7e. 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/DKUM71000916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e561ff848986de9775c2b0dfe33cfb2966f6b5b0886782dbde389d55c74f365. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:39Z), 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/DKUM71000917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa595c72b6d9822a6603b635550282f0450128e235c723003469f713a4e24d460. 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/DKUM71000923.
(Intro) Afrika Og Min Dårlige Samvittighed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b354f5758bbe5ef14a0b14146719cdb4eafe91f934cb87f324a0106cb7d4c4. 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/DKUM70801163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa809fada3803eea70549def6be5566d0ec18a163d0d12841503b91bd4168ccc. 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/DKUM70801164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01527ce9fdba1b2b8978eaee5520879a5b3b25b33dac75b3335fe47f1e0697d. 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/DKUM70801166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1585d41ca69abe0c6599a99d2020e4aadc93120d58d25e86d8944fa331014f. 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/DKUM70801167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c1cd87d913f18d9d79b0ec2fbae20902daa448e92cdd98c64ee8fca8e66980. 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/DKUM70801168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816d3e86f13df63077aac29f08d27a0e013f05733889db5256a65bb1303a49af. 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/DKUM70801169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a554d06bc8aef0eeb104727fc0a4e344526e5ad5098889a47549f570ded992. 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/DKUM70801170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e92bbf4b6aa0934be3712a4884149ebcc7790eb38fee7d92dba5098b7af16a0. 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/DKUM70801171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83313208c057944321f53c294afc8830a898bb3475cd8e0fe1f7f2e3487ea189. 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/DKUM70801172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29f804b287500b86687574ace63d2dfb8b3246f554dc556de41fcab63711bb6. 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/DKUM70801173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9de920a9c2c2d2ded6410339f57078868dbeaf358af4d230152df8d8616f2a. 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/DKUM70801174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ea14e837f7791b71d511c9866d1d73203238d0eb431d9d753b66d402f34aa9. 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/DKADG1100332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02cbe127145a1c5c86c9b03cfa8129614a8973b5ba809e548679a263d8e8319. 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/DKUM70801486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6729468a8d2907ceb1a3ff027b43bc585c0dd01dc19573014500ed11756250. 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/DKUM71200830.