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 0x4ba5189a5c4be60a8059b17b1797ebd2a7dd9e0870d0468b10d686813bd81c44. 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/183bcf83-a127-4fd7-b22d-f6b4e0360370.json and https://artists.proofprofile.net/proofs/artist/183bcf83-a127-4fd7-b22d-f6b4e0360370.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 0x7eafe718e4e9855cd86fd522f914136ae983a8ce3961e13c61811f79b42aac36. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USV351338306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741d9474b53f83905a973a11b144e49b26d8ae4dc3b0bbfbf1a82b21ee7b50af. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR6V82245176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3590fab1aca8cc4b99ceb0a9fb1a08a7d74887bd8ba682d9d85e72810541a0de. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USV351338357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313dfdce8ee004bd91dc761e4adf6423accdff9031fcfca50eb085aa6fc8a588. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USV351336555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce22444a8a67f25a43cc47b22fdd4292539c29cb4d30279e28a2d2ba2f9ae937. 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/USV351348743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022da6a5980dc559b057ed99adf4ca29870bfae505443a4e67eb55640ea6b00c. 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/USV351338432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e2345cc8fc5325e8c337c41f3cfc8822627416362e5155360868659561e5ab. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USV351338451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18aa36a7dfa3dd2e107a1cd4095f8f26b5bc82f7b5c231dc3ea7b51142698ca. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USV351338494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72155a6b5841791acff5e439771f3e0e147850682119665ca51c420da71294aa. 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/SMRUS0027391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb64ec123369cf3e4242cd0f6cb1a604645fe2d9aa3e318739596b474f3e790d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SMRUS0027408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6162b5df5783f207929e9bf726ab4e46350230ec0708f2e34a2c4dcefea53bea. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SMRUS0027411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab409d9686a36f5d33f5fb4246b8b8a6a3198f75fad138570076f29f1393d68. 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/SMRUS0069043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56181904b3320395fa2643640d3d79372e6ad3738df5009d0f0605d26e54fa3f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA371141919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c89851723640f540ca0249293605174c0194d0f80859f1cd56db6eaf1ba090. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA371141921.
Вениамин Баснер: На всю оставшуюся жизнь. Песни о войне
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3bf6319773894bc7f90d9a76fc896cd8ce08d816fd6737515f7c6c80c2a401. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QM6P42071252.