Loudness units relative to full scale (LUFS), also known as loudness, K-weighted, relative to full scale (LKFS), is a standard loudness measurement unit used for audio normalization in broadcast telev
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 0x1650a32ad796e68e6e5f7e8c8b2b52cbfcbb97080d6acd5c55a6480f9b29cb5f. 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/cc686c28-0743-4928-8e30-91e4394b704a.json and https://artists.proofprofile.net/proofs/artist/cc686c28-0743-4928-8e30-91e4394b704a.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 0x21ef5238129f0f7fddfc22b5cc040d015f49f610c58d328946393a5e0e76aa23. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GXF9Q2402846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135542372253997eb3c3a6475655658f796db323113297e14a7b20a0fa20d02b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX53U2499559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee301a50fc630b0c7726c37410df2657c04a5ca42480cb5b9e969990302e61a. 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/GXF9Q2442360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162f9543d2ef86591573de9c39e45287f7a8f6c6feb4836889002a18053ccc33. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GXF9Q2443665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3063a0548d3c4c5943f4606fcd14faca3b81f8fbedfdb3c592c4c6232622f41c. 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/GXF9Q2443714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d847f62826d15453284e1719146e22465a7c2dea1b4ff1738edcabb682f2c36. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GXF9Q2432519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa690c03b45c69e63a27bef7fa6e14375b854dc1c749c53088fc5dac68f362a4a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GXF9Q2432521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2ec3fb3fab3348192623dca00cd68b008a1203980e17be5b9ff8dff5a543ac. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GXF9Q2432522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d562b3458e1d1ce8bde2b15d573ab0776089d3f7cedb0e0132ce5c2e44fde4b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GXF9Q2432523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e171ad971430ad7ec6519d736296495ec6cba6371bdfaeb693efe7bb9660fdc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXF9Q2432524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8894b033218b9a3e7af9f264f78c3d4b685674a1ffe9d8144db67d48df03e3e2. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/GXF9Q2432525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b82d29239ea27dba494343d58ba11fbe6b1f05740b82282005d595b2016e9a. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GXF9Q2432526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc6c0609aebf39792b59917336965b929e41775996c6dcbaad96a4c4a2d8b7a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GXF9Q2433606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27190ca9c450035491d23dfcea7ab926495cb64aca2731cc5848339187283891. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GXF9Q2433607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719d8903960d371ca9130e2b230aeb63f7f999f373200d591a191934a60f8b3c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GXF9Q2433608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f5e9920546adbb39ecd2de735c356ba1a4f41da23a1f46d6c924bfe1f60795. 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/GXF9Q2433609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb66c2754c51c1c3d90e927bb69e5d152b83b2bc186b91af282a5381719d5211. 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/GXF9Q2433610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4cf89b1c18750508ae1208e6a104372b5dd4e5472e0fcfbe4731343f19667c. 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/GXF9Q2433611.