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 0x3ff7efbc108c8cad37a507bf6bea305c6598fb1298bdab55bf7119f65f7829cf. 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/50d573fc-9e39-4e4a-ad6a-0505b428912c.json and https://artists.proofprofile.net/proofs/artist/50d573fc-9e39-4e4a-ad6a-0505b428912c.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 0x81acbb36d8a9900362b59c57653dec9cadca57f42bd12db7026f6e1dc4cfbb1f. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/FR6V81638793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbead623960b7d1c1157e3e49db4182896850ebbc7e92a62c733cc64195f4530c. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/FR6V81638798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201b6d3da1cd018aedac6f9cfdcb61eb175ea1b8c0dc46a0b31cccda8a130e6d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FR6V81638800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d38712044af06ef29301970f679e82587ea9697d81459bb24f05a14f3bd4973. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FR6V81638803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970af534497344f4aac37271216d29ab1dce8f46310443e0e472f271b8ba9fd7. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FR6V81638805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355737517a8665d91f56691a497680075f59e932c765bc17c8770a7cf7e6a4d7. 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/FR6V81638973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505924fee4ca40c39f5176b562fd22f099dfed1b34311f0d42d959fdf2abfc2a. 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/FR6V81638975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bc2fd42ab4a7f39bbe892dbdc37308f747f4f7be7aa4b4aa4a2d7ea1ca2a37. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR6V81638990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8787cc3aaf3216c36709af0662b72092b25d2b0b66105bdcd1ba8d0bfc494d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR6V81638999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fda8a39c2689af980c384572f3e3f74f7eea2d228b98213971080e30f91cac. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR6V81640881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b6054c31bd3f26d4283928ca67499032baf817a675725f014f8c51d756617. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/FR6V81640324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5948f3262a4df5ee0f62ca5d75e45f3ea0f20ae777b45602e6af8fe3b4c32901. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/FR6V81640326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e9a6856053c91295ef65db4418f99a75094c192e021eb8fddcf6d770cb8b06. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/FR6V81640329.
Пятилетка - 50 Лучших Песен (Большая Коллекция Шансона)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37a04205f50e98bed962b654342c3b04031880a088a9f14f4e3abff464b8cb0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AEA0Q2052454.