thumb|Elina Duni during a concert thumb|Elina Duni playing the tambourine during a concert in Biel, Switzerland Elina Duni (born 10 March 1981, Tirana, Albania) is a Swiss-Albanian jazz singer and co
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 0x02d553bca602adbcf38173b2229aea4e935f5ea914956c74d7a8f3e51b52f9ec. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe4822a6-d59d-4188-b36e-878c478c34ef.json and https://artists.proofprofile.net/proofs/artist/fe4822a6-d59d-4188-b36e-878c478c34ef.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 0x8d16f89473b83895618f835259f3c02d6b5efb0db4ea7fea48c429a6b9ca0352. 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/DEB332068901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9466b6c07c37e64ddaac7df7f7a58cc056a84714d10232dac225bc7faaceb8ed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB332068902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cbfd1e708f87813f2a2f8f8205b7e64af0de1e6429832636ff948cd7f51b3d. 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/DEB332068903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd7dd6a1be7119cab4ce49c27580ad81824cf8ff1ce1a7cdeb15ca4aeb74e7e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEB332068905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8621db2be79b434a54c7f6a11aff8c033a82019cd26f7cae9b7775fe25c28d80. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEB332068906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d251dbede635035c3bbe59630592be75d7507fbdbbbb9335d4447be212b22b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEB332068907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca0bfdbe1f7464c82bf4ff7cf190362845d9707345791a7429f5da1aaf1fb56. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB332068908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496feaf618670404ef3e3f84334f460490489fb0437d46a1ac7e8497ffacbed3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB332068909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaef43e21ecccce61b3dcdeae3b5a2e971524958bd6605402fcc0ba76bcbdbde. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/DEB332068910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb219c94b71e3a594e0ad7b9792cd012883e96a8e75a338eef9915534452dc1b. 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/DEB332068911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c7a969b0f44fcca07d3071fc8d2becf1cd54fe1857f6b76b10e0701fae90ef. 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/DEB332068912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3be5cb9478ccc04f8fac0113479c3337a903504f47e743faa5539dee588323. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB332278101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d16f89473b83895618f835259f3c02d6b5efb0db4ea7fea48c429a6b9ca0352. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEB332068901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3be5cb9478ccc04f8fac0113479c3337a903504f47e743faa5539dee588323. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEB332278101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b106457d5cdae6249faf54664a634c6438c66e34d1b2ff038be283d23f47f79. 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/DEB332278102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c25730169454083686f5d364ed267082b25424f5d66415819e8fd8479d9ca19. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB332278103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bf522a9acae9515f8e21b4bc71ebad918dbca679fe1ee7d1a2e09ac117ec02. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB332278104.