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 0x74ecdac6dec4012a8089200c1678005aabccf508d23a146ecc185c8603d574f9. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb54f06b-6a60-4c07-b5c9-757a2fef99d8.json and https://artists.proofprofile.net/proofs/artist/fb54f06b-6a60-4c07-b5c9-757a2fef99d8.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 0x03f7875e7c4b24cbd6a23d8bed15b7bbcdca944495ee5dc146475c9f739b908d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVA100600135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2245bf43e2feaf680a2a239d4708076aadf235d47d24f4bea68640bc71cd2c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVA100600136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577be9f53caea00311d04dc0b5e7da7634dbf4c4a550505c03965e703bd7ceb1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVA100600137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cf993e44f3dc53ad97d51dae5a7e8cad04887f04afe2afa28f9f7a9e7067d1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVA100600139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d37e70813383791c1475a66357dff020d8917558e4607c89ddfd9f9ea32a8b7. 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/LVA100600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ad97bea056f70116afc07f2fbb5a5e505b1ab3ab4a1275fa4632c2d08274fb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVA100600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd1f53fbf417190f082d36defda23af0f1436ef2452d76385c53f892ea0a853. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVA100600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14108f434b1e38fceed84669bd2dcc22b3d6fa9dadd9900d44fc2e0cd248ef0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW1544881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba045b4f14fa205c06ea7ed022de4fb85a07ef21d91c9c5243e77f506be609ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVA101100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7a26b8c42bd7683733e17561df4ae2bcbd369de20c9f2f50d3822aa5ebfc42. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVA101100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06226bb71ddbb7b82f8e400aa0cf86f7f37d576e6dce99dee10b79ea88831a2d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVA101100036.
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Viena gara turku pupa Rūta Dūduma un Zeltābele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b66b31621b771958519a2dcb8b59ca09a7f1d07dca105ca7f91c8b1c752ad59. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVL151707267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653f0fe892955aa8ded5b4a17a24c82d5ad2dc461ba8de30109bdd2e02799c30. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVA100900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f9a27ed0b34c30720757facbd251fdf74133ad93e6ff1931a7099cd9d2f15e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVA100900009.