1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xc3c12df168a75cbb0596fab8be2ba6f1ee81c3dc9db36d5f70949fa909b47308. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63690517-56c3-431b-b839-11698589c36a.json and https://artists.proofprofile.net/proofs/artist/63690517-56c3-431b-b839-11698589c36a.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 → block OTSBitcoinBlock must exist at that height 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 0x3e46ffa339b606b8f0e0bfc26eec757949176ca351c82df09b08b62bbea5eb27. 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/CZA167000433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18364af9fba9939422c49d564ceb53a3eefcae817e3214d6eebda79c55d7ba5a. 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/CZA160405831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf4a3a6a0a08b61bd42db5ebb4ccb1cefcd1932c7325092bfa8aa58e0c041d6. 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/CZA160406870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d71063c3d3a8af8795ccecd0eb0132b58a4f61dcdfee83ce1a86c4f2b4305e. 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/CZA166800673.
Check The Czechs! 70. Léta (Zahraniční Songy V Domácích Verzích, Vol. 2)
Bratislavská Lyra Supraphon 2 (1969-1972)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b525d72568e8af4b08fc4b0077c3e32cd8c2eca17673c82838cb3699b07242a. 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/CZA166900373.
Jednoho Dne Se Vrátíš (Bonus Track Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeded4ba4d26f31499cd9f4b986344f4e35f49bae2b77c2704f8c838cc68b59f3. 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/CZA161102877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eee3ee2885c992dde5bb0b4bbca2b1c768d3ca4930f4d688b05991db6d2b21. 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/CZA161102880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836c122d19e01e48e6b0c56aace1c48b040a2244430c385637a21e7ac2c9a067. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CZA161102881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c53f5163de5f5e80e0ff0ee194db9b3b0fd47eef118b58a3e0706b8a9036645. 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/CZA161102883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbda5b9d95a900dcad3eeb44740ad95376391ac6f3d370e09092312a7cccb6b1. 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/CZA161102885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855ee4772219015c572c30a957eeaadf426584bc13cc851c8251607d82257110. 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/CZA161102887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04d3e7bb08d6954e944c8feb88ba78005e31c2a577cad43de6dab3199b59e9b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZA161340009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a177ee01483777e486e750c4b11d087769d0947b9891d4c7f0b8a00cde55040. 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/CZA168500492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df9e042ffc361583ae029db9369f5ee57de63fa8e03c7011be1205a8ea0cf64. 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/CZA168600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb9258ee06638e23aa49430bf1d38a1cc8c60d02de6817b2d82c53886220c18. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CZA169100617.
Dívka Ze Severního Kraje Nahrávky Z Let 1970-1976
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dac786273ec68fef0398825d0f02193973264040c286a0d5b89d5e4e432906. 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/CZA160411712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee46472f3bc98033ef1776192d7d625bac0bb629d6e45c36a1a0c91973a2faf. 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/CZA160411724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ff9f2e3a6397db8caeb78bf764aca4d89a336f62897db7255217f0c4944b0. 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/CZA167300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dbc920a77cc0dc9393e80c973e7f4508b91cda49b715c84e11085f287fa166. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CZA167000453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114afb2648ad18695ed999f56613d24f5777f24b62dae21750e2f9f51115c984. 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/CZA161205426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32c8ce58843adadcb1df578dbd2623a3003b152184e932da5c61908dde79759. 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/CZA167100410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4db67b66938232b75d1dbfd3a5ca8317ec5da0ccfdbf5d4179b98d4d3f4403f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CZA167200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaebd92ce437a9c8a341e4fe753ddf7ab5091dbe69145477c2029462cf297134. 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/CZA167300401.
The Best Of Martha & Tena (To Nejlepší Z Let 1969-1982)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2636eacfcb46d2e7366c9333da2209cd02dfb22a12cc87f9fa08de77f9b9772b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CZA167400398.
Chvilka Pro Písničku (Bonus Track Version)