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 0xbd8f337fc94d038a3a8d384d5bc0f5f2852e2586a8a0f76d1f23c39770ebad0c. 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/0b5af6fb-c721-4757-8e18-85f951bf93c8.json and https://artists.proofprofile.net/proofs/artist/0b5af6fb-c721-4757-8e18-85f951bf93c8.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 0x125fcb2630a2cb17964652e673c070c95b418e3543d910539f2cb9986835ec84. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/CZH682200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221631ca2ab1cc6dd200568ef271658925ac9c9ce0cedff4c07dab39ab6b7db2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZH682200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3cc74f9dae7ef293df0f7ae392f5d03c05d4758bed6f56b8d66db3da852cd7. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:45:47Z), 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/CZH682200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc267fb3a3b43c33e8f974b5aea07148ce0f2fe88161810d1b41aae4fb8eb37ae. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZH682200067.
DUŠE, KTERÁ OPUSTILA TENTO SVĚT, VÁŽÍ 21 GRAMŮ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29973bbac8dbd9661c84a59ce3e24c63bb6395bfb2d1f6665ad46f1b97d91e29. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:33:51Z), 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/CZUM72301554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec67e92b1e6dbbd32f484a326fc6b018e808e6307a1dc90ba09886258d654e13. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZUM72301555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f2ff694b5fd7eddf3162638431e8c4da4717aeb8f0c064cd41a60c182dc285. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/CZUM72301377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22022b2bbea9ed070fd9a9a1615eed9fc049e93b882df10296a9eadb145a6052. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/CZUM72301559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc515c87dd389846094e5fbe8b18ac368235cf1b1e5b6c7f92140dade78e6b9b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/CZUM72500635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bc794ed8297c349358869e21b07b3ade2196be5b1cd1d744099db1a722d6b4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:10:44Z), 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/CZUM72501136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c8f729cb126ed2f6f8c02b5069c8d653980abc337186dde66e217756c4034. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZUM72501137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a5708d31c2843242e9595f59aea2beef50a6dd2adbb9a150b60f4ed3a9dd7e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CZUM72501138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1eda759b54d361041db8d612c1ccb6ca0e01fe5b2c8549a03e8b5515f87e3d. 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/CZUM72501139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873b4eaf7155f7e0f2b3a99e80c3419b613dc72f93da5882a7c25139e9d478c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZUM72500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3115c353ba1b71f53bc1ac1f8040834cb4744ca04707448bd45996026376dc. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/CZUM72501140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868108abccc7aea0fed8d0b5fc6fa0997dc01a4d8e16e01c0833fdf4ed368d83. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/CZUM72500857.