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 0x2bb8fd09036da9bde1bb771ae8c69ae60099b2356127de6fcab03b22cee22b1a. 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/054ac8ec-15c8-4dd0-bd6d-025e28b7b86a.json and https://artists.proofprofile.net/proofs/artist/054ac8ec-15c8-4dd0-bd6d-025e28b7b86a.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 0xfe131e9cc4229bc1ec2660840349b0271308110713b19f533138dc6fc6fe57fd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA052535022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf6a029c51d2372f64d196ba40837561cc054fba4c060123689f9eaf9426afc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA052535023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62f5292858e391b7954507ff574e099846ade084ea16e460c9d9580b43dd9af. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DETO41658801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dc78ffa05a14b54a912a77c987083fef3a872b2dab002f3e0ce9429e8f42b4. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DETO41556552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14227f2be22e508c4f1a77b904c157877269cc91269031dd8ff81471f450c1f6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR96X2302662.
Teuta Selimi Unik Ukshini Vjollca Luka Dani (Gezuar 2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1872489f51934e694a9d81aeb784af2b92f01be09ee956b82b212c37dd92f778. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DETO42246666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7db1feb2ca92f3fc85c2574a1a97c6e59351d083cb265c67f35db53ad5a408. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB72351870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d5cc598d09b8b3b10d4121257c5789e66e3adb0c9ba6fd512a9fd8897c19da. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZTB72351873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a4accd59a5d0615519200020302adf1ecc36e1037a8bb5953e5ed8e060bcb1. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZTB72351880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a2d698b93d6558587bcba8bc8ab26fed53bab6bf689eb556e94f06136a5c01. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB72351884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac640cc5ca893fe5510f31b4cf2a26e8967162969ca17fdc2cc88d63ade80930. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0Q2311145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac640cc5ca893fe5510f31b4cf2a26e8967162969ca17fdc2cc88d63ade80930. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0Q2311145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b25c83bdcee3115684648c93a7a3e23bee8616b37730629136250ef1b30be9. 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/TCAIZ2411059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1503608aa660c95177eb3bdb690cdd6115c0a4536be6a389a14ad95bd6e899. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0S2451499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6819fe9635119fc356a788642868dbeb30c93804d8be8158b1d2e4adab37d25. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX452593150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a4e7f59b63ac4057e5c5fdac4231bd57a56f53c88a7c76b548b50f0c6efe49. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/FRX452593151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde08066db28b8e53da12487da9c8811914e6020bd36ec88caada698599fa179. 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/TCAEM1991165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dd766095a2085bd17b308126ee4510b016ae0cbb0e481d3506f66d83947bd7. 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/DGA0T2420807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6e2c9d371e801cf46b524d4867654cfef3e86ec74657aec66fc3eb54edc726. 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/DGA0T2420982.