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 0x2f37a056f455ef46690bafb466bc5230d5ce8a28568998b4016e396b9812a1e7. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/907636df-605e-462c-aeed-bf8583cc7106.json and https://artists.proofprofile.net/proofs/artist/907636df-605e-462c-aeed-bf8583cc7106.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 0x1e5e70d832b0ba81129010d493f955ad851e97398e880d1483ee0adfa9a90d2c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CZA381603203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9ba6fd67258ac15ce11ad53259356dd1f2df0f62054126624c2f87154351ae. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:24:50Z), 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/CZA381603204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb1e4a27a3e4e2935010e0785816839df30fd6592f3d2e99e60b06a96e60d9d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CZA381603205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36999af9aa82b878e43800ce0533153be3f2b17b4976c645d2d5315b628592f4. 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/CZA381603206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d05884fc4eaac58b6cfe79a1dac7f4e77531a205ce3da7223715d6f7924dea5. 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/CZA381603207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7689b96eafec045eb9cc9d07b73e64295d5064fa250ba63bcfa1a468ac9c7e. 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/CZA381603209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7435ecc61dbc160ac4dccfbd7240c1c61a8bdd8cae00a5e49a9ff9a62501c6. 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/CZA381603213.
Stracené Ráj 2016 (Nigdé Nésé Moc Staré Na Hanácké Bigbit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3abe99d103b911d230a4806c45fbab2333c1f90fede479d61ee5f597a30d9b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:40Z), 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/CZA381604201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42c1b3de795cc6a3de3b53e39dc6ddf35e8e1799a55c375a526d495efa50c6d. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/CZA381604202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4886a092f6e7ed23b6764fa7aec4add05f85947bef57e4bf284095f9c488b058. 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/CZA381604203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb6e50bc670036d0af7ec6818065c97d7fcaaf493aa7c7c6dc89bbaf40ae810. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CZA381604204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45a114a73218d2c8f0939a2f0a12559e4e71af3786e5e4263728db0cb4091b3. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/CZA381604213.