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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fbd85c9e05f3b72cf9a1a358ba6ce51dab7b454a14c3a3404093aa9e8b08b5. 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/25f2375b-28aa-401c-bdef-3137e7987116.json and https://artists.proofprofile.net/proofs/artist/25f2375b-28aa-401c-bdef-3137e7987116.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2e4ab0fde80016b3bf640368f3d834ac08d722789a59846c65071ffcd9764a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR6V81638757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd04ffcbeae2ee25f56552db9e40bf558bd4dc5e529e32c2331be46c96500de2. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FR6V81638759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0088d403ae0761c92be52a99d0ea6373dc1f67ef1df48e33fe4e32d34e1930. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/FR6V81638721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32335dbf6200c87a4a9c417742c82cda246e35a610ccefb02e1517b3923eec07. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FR6V81638724.
Здравствуйте, мое почтение (К 70-летию Аркадия Северного)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff994458f84f5bbb2828e17f640ed3d846f7300f9d9154f6077096ecaa147e6a. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/FR6V81564331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2a50ccdfc85d0a58c86ee588f5f3a02948e4172472d77dbcf5d7cb7129030b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR6V81572666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81cec6dc6f2f556ec07d86d1945a5d6788534c2ff82148541360230d6afe452. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FR6V81572667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28882ae57991013765cdaed8659e19cbf2a465525f4fcd470d20f468027b6f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUB731403008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbda4b8c79c5d40b7e9e6aff3e5bd8a01f4933a3f3943246a5dfc691414731f9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/RUB731433795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb13215c91c41e1b011b2188f7d4e2f02ea9925a9033e11284436f3491523dcc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUB731433799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad324c89cb84874e218c56c25a04559c4eac75d48011248c018c12f56e2ef61. 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/RUB731519548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d6db128768d10bd6b999d9b0c28caf9a8e055e089c8f64b605c1c0b07d85a1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RUB731519512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f957e4c89574486ee02a781d442519f5ce59cda6823aee1716754da995cf28. 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/RUB731519514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b36120b4df126bfe046827614ae5c096feae4f69ffea2fc355d59935ab0a86. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUB732016618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f0325fdc703755cfc5290a4eb783f5d35faa6a9dc51b03dd6f4db56f3c18cb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/RUB732076154.