Gothenburg University School of Music Chamber Choir
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 0x98b137b616e9b431068b95dc013fb9b8e190af84596601c5cc99b33525b50481. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16f7691f-b90c-48a9-86fb-add1eb2686dd.json and https://artists.proofprofile.net/proofs/artist/16f7691f-b90c-48a9-86fb-add1eb2686dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Göteborgs Musikhögskolas Kammarkör - Inbjudan (Invitation)
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 0xe0c3bf48002c66fb87e2dc859a24b98110c454a95f5b44717272b6a4db03781c. 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/SEVOZ1153301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc647315bb7acc4a74b08cd4fc6956f3e73240c0a914557fcf2a3552c888e52b9. 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/SEVOZ1153303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2ace8045c4e4b7bf35a422d9bc237199ef860807f3cade5ce65d6e943607f3. 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/SEVOZ1153304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0849b3d1eb00397cb2715e899019f35453ebdb9e6dd772cc76e830f00cef84b. 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/SEVOZ1153305.
Ge mig en dag (Osterlenvisan) (arr. G. Eriksson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8bcf534d26cc106f6b645cb03c96ace57d5fe5902ba203e42f675fa1c0eff3. 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/SEVOZ1153306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1befc238fe3d01262f4d3662e0cb4ea0b852edd3802cd8238167b57a9991012f. 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/SEVOZ1153308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1cac1158c03fd0aa123afc0cb4fb347045326e8c85b7e2fa41d574c3b9c721. 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/SEVOZ1153310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66d445412eb665c7576edebdcb2e0e73d65c8a3f5c96e3e333cca52c65b37ec. 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/SEVOZ1153311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aff35148de953949595bd0ba7bb62b228d696ce15cb7a1f984354be2f78eb6. 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/SEVOZ1153312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b846c2ee45328af3986a304b2dd00c6c7dd3a431317b572803378100ecff4d. 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/SEVOZ1153313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78867dc949acfbf2990e154f6da5c427ef0531e0d3785d5a5f38fd0ea3646200. 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/SEVOZ1153314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3b827a38a67b5abb6f00fab1e646ba5e7cd87e367d08b4cacfbf09ddae1bb5. 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/SEVOZ1153315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cbf938fea59a9b5b2eb479bd555acce7391704476d7cf0f30596a08700cc7f. 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/SEVOZ1153316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a441a71ec2007ab463ab6353eaad7d284188f1e07295e6b1f3927a7774a5d68. 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/SEVOZ1153317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46833627ebdef23a44aefd03339aac9f92173a2188c9fc1faf2da885492a8f3d. 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/SEVOZ1153318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916cfb341a820704f2116b2da7bf2087bcfdc8340b85eddd3dc25bbe70d57827. 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/SEVOZ1153319.
Mouyayoum: Vocal Minimalism from Scandinavia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5089bb0029252530da4744c954d965f60ca57384cea358b0650874934bd0b69. 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/SEBAC9413010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7766d5928a1bb116e62814afa40aabb2fffdd4ed2053957a514043a3c34dfd3d. 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/SEBAC9413020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8b30b09383b9753d1826d0489bad4478a7a44866c4a6c04113dcab9b9d4448. 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/SEBAC9413030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fef1827174f9a167a77e192d0c2a63b5b448c0319c9d4838cf5929ff72c5383. 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/SEBAC9413040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75576ce67fe4faf95bdd4ee1c930b971068f22f3723ffaa902dfb6558561d469. 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/SEBAC9413050.
Komm, susser Tod, BWV 478 (arr. K. Nystedt and G. Eriksson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8eefdf244873cb4aa98112d4829ab9cd642ae0acd334a893c782a561859c79. 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/SEBAC9413060.
Vem ved (Who knows) (arr. I. Christensen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a82a1a1fe8e8b122d953fc639a4e86352249288461fc6aeaad472a6e0c7a6b4. 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/SEBAC9413070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d75ae3bfab2ec87bf2e3e4eaf125632714cd36cf0b17bba7570b419f9ddcac. 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/SEBAC9413080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f60cc53d9f012a7c46eab8e1a3d8bf4a95afc1ee88bfd022c5ce5fe758c7a15. 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/SEBAC9413090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689242f020518afe52ee9545b922caaede6acb9afad9b103919f0c4cf79573dd. 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/SEBAC9413100.
Ge mig en dag (Osterlenvisan) [arr. G. Eriksson]
Komm susser Tod BWV 478 (Arr. K. Nystedt & G. Eriksson)