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 0x2a4caabcdb62d97177454dfdc71dc74cf70aed4891541227d48ee6d27a7770b1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2445a6e7-f4ab-4a35-a922-08d5b4067278.json and https://artists.proofprofile.net/proofs/artist/2445a6e7-f4ab-4a35-a922-08d5b4067278.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 0xcedea646c567d285872cccbf431682f2db17338faa0010f8dbaa84810b361032. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:46:13Z), 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/PLC592100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cafdb3aaff31dd3ba59067525004d42088352c628a3830ad261ea0cdb1105a1. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/PLC592100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d0be1a70a4d049403a32ee9e21ec53a70cd06be5296ad539d8b4ad342f5372. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/PLC592100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae424fed73679f13b4eeace45398455ecfd64ad454864387bda97d8618c27a5. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/PLC592100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eb272f2841b299082daa7b514f2c1e6c835f748528187a06b7c538218eba6a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/PLC592100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a896e86f8bb3363947d9c093d1dc323fa6691b45cd2fcb9bbbf71f9278571f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:09:29Z), 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/PLC592100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e8f0d6fb5dd3a78f0d3358e09170b0fcd33ab9f6f3ce62671cf83599b6a141. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:29:55Z), 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/PLC592100054.
Maria, Maria (Agora Muzyka Live Sessions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf544e15c9777159545aabcf223172b16df97091e942ad1766481d69ee23c9215. 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/PLC592200099.
Ostatnia noc lata (Agora Muzyka Live Sessions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673e1afdebc663714e6611905bfddcd92549702b5ba4308c93f0a0a758b34ab. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/PLC592300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a854ebe5d29497e4d3ddb78278bb80c7fd7005a329b57b9c77bdd0273d9faf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:23:46Z), 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/PLC592300293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8526f9dc8bffa0a54dbc7212f348db42a6bf372e225463f1d41058e43b5279ce. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/PLC592300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa4e67ba186f3469913b6152869535bb92e3f728e1502773987810687e48ea6. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/PLC592300296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe692e155d85141e6bcb6e15c7b72866238e461a86f9c86c195f77de13f23c15a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:32Z), 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/PLC592300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b4c40441ca768a1aa2a9cfee6aac0ab54ce91d2bd0feec03bf0f9643ffe586. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/PLC592300298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d7c5b50d5f4a72ea3e6234f904ae991245c7748eb9a41e3b6c5aa2fb5a55e5. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/PLC592300299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3e8856cfd5d50093de7f77626ca7997801de1999712d3241bd8f36f7566cc6. 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/PLC592300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20478566ebee05e8ac2c61f52f13c22852fc50e3da714d9f0cffb83afb6e4279. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:34:19Z), 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/PLC592400056.