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 0x13fe1c1f20b40593d1ec653d1b34b2b54f5cef8adf05b21cedca761ffb40925f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e089200-c470-43e9-9224-3c6b9d9566b7.json and https://artists.proofprofile.net/proofs/artist/8e089200-c470-43e9-9224-3c6b9d9566b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zelenka: Melodrama de Sancto Wenceslao. Music from 18th Century Prague
Sub olea pacis, ZWV 175: Symphonia. Allegro. assai
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 0xafe606018002999b917985d1491f2f5c264b9a46fe3836028c3e5f0cc72c38b1. 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/CZA160101013.
Sub olea pacis, Act II, ZWV 175: Aria. Allegro. Angelicae mentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f57bb0e4c3168a41263bd60b151af4c9f3600f2064c4f06554e95907389aa1d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CZA160120013.
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
Kusser: 6 Ouvertures de théâtre "Apollon enjoué"
Classic for You: Musica aeterna, Kirchenmusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6649c33a7996cf514d3185c53d2d7c8f80f505dee2e73d0666dbb1086410f1ae. 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/PLB170900818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b30b6fbcce431aa804bd4c0a82644d2272172222d872fbb79d115d29ce1571f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PLB170900821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83db23ca38199662743828b7b0bc38b1d74eedeab80ef8e67a3b5b04d5124ad3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLB170900822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14ebe7255a572af4e2a30186dd1112b7cf8d2b9cad56b5716c4c6d36b846f85. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB170900824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccf58e0e27ab7f677ec165e3fdf38e7c926f4bb83734becf291b2e840940a9b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB170900827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21bb3a341c6cfe71524024414e83de6a1b01c1727bc5a09b5f63d0c07b0441. 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/PLB170900828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4363759fc38510f8f7f58790dde76366b3a906a37981e4c4c283ae326f05558f. 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/PLB170900804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5179a3888197ba6ea2168c0ae34d92347f61c658b4395a4ea007b750f1673945. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/PLB170900808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b0ea2856bdb312b174b02e1754fa9606ffce3572671218ba44e707fb3a89bf. 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/PLB170900809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fe835f9e8fc9b98af7c6784fedfae28144d30b355f0d840afac8d8be7f85ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLB170900811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a213e9f5b3555386bbf0f19e737694396ab7f60147f407ad915abc8685642f. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/PLB170900813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6c32fd725e8b1420b9a0779c3fd1bcb87ce59a1a3350bfc766fa9eb30f0bc3. 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/PLB170900814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe108dbab93292a5f8e8f08839ff285b2aaac81f07c16a4ff89e64176e4bd326. 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/PLB170900816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2762e88bd1ac56017c78286c7d6dc3ae63d8a43738a3fd54a144cdb3522b9d1. 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/PLB170900817.