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 0x727f892027d4dc2bca53573feb95f5c62e2b7f44f639cad91390d98d804f6dca. 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/74257c73-8fd7-47b4-8b05-01968ad2c761.json and https://artists.proofprofile.net/proofs/artist/74257c73-8fd7-47b4-8b05-01968ad2c761.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 0xdccc9d2fbb93ab539ca5f22c3a23254d91236667a215d6cfe6c62191efa0be21. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZNWU2499228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beced388f3a5edc5faf2059b083230a8e2b85523d759d60d8ef3741c5cf41c5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:25:37Z), 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/UAEO12400289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e48c9e5fe6062fbf497ce4ad0a54f97bcee931183b00fe2cc4bff7b6cb56fdc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UAEO12400286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a022f6944426c36adfe3bd5a8c6b42b16433a4dcea37354bbf4c9062d326889. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:32:06Z), 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/UAEO12400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78669ca319769b2f2a6f1a7b29ead7bcfd99415a4d7160ba2428229e18e6a218. 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/UAEO12400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a66f7e2aa1b69dc0679cbf9a154280ec54f23f43f372cf54b8bcea6c750b0f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA72484080.
Нумо Козаки (Kalush Orchestra feat. KOZAK SIROMAHA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0add15479b13eb9ec68cda10f30cc64d788059a7f3eb1dfbae24971cc821e3. 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/PL2DY2200073.