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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639fe4c4696c19cc2514a6c70b86207d55ee5086a1a4e49dad01dfc9a1ee419e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ab559f1-cf85-4f0d-a20d-6aac80b6885c.json and https://artists.proofprofile.net/proofs/artist/6ab559f1-cf85-4f0d-a20d-6aac80b6885c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefca7ce08649d9747b46fa4d2a9e5dd7f0a0f7f5aef5fb955f22fb65712d750b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7S2460169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1c0ca06029c9b8d3611b9196dedb542d5b6aee7dc3dcfef9424db18200fde0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ7S2460172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2e5e62d8a399a3026b585a04e03112c1ef768a776ad0ce831a8a93f5d2742c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZZ7S2460175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c82c2efe92b11dd59c83cd5e866437ec70faf151f79609a68e18227b5812729. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7S2460178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe30838bb53dbeaa588cec46461c453a9e3e59d743f8e6f7b2bf0dc4e809b816. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZAPG1725174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15be94286ab6513b9b976462ab93a27b3ca0ef722a465a9f309c5d41c65a4fe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX3Q92343183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c53976450f187da7b85c617244f964ea90253b647c67bd4c7ff409b14dae28a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX3Q92343213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e094652321419533732845f4cdf28076ad2631f94741ec315098139414fd643. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GX3Q92369897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bea828ea06b1bb5c0ffbffc803d2a8b478953ed5c5d27d700505d355c8165e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GX3Q92375547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ce2e3d9581fcc58e03068fd5f33e585ebc326653c27f8b70ebcc5570512d95. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBLFP2309633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c00edf28a905d3b1e9257ff47ed24b95e875a7dcd80cce11eea725e8593d49. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBLFP2309635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee5e4ba3e3c213dc39f62deb100cf9ea0076fe05149d3af278990413b188f3b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBLFP2309637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a38b08c4faa00cd67f5c7393fcf612f03f0ece1ca35c8d65310d75ccab8b440. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBLFP2309641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf91ddd66d6a6de6eac369c12146f77382b33b94176dba0adb040dce8fb363c7. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBLFP2309642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f3909686787424912b0e1123f86d6e7c46e6478d744f3d7b14789238363fbc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBLFP2309645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039d6b2d7e24378256c13b7941247d5d56b290783d2d62bc25c22e7428e326a8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFU2459950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e34f36f9a8b5874d7e64cf23e97c88d2b56a452bda6f4967a5415ca4d3885ba. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFW2495930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26cd692e18f36f114471df690b1d3698f62760cc030693688c2d9b7b492c23f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ762438192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194fa08bd978b99f86234f6a8e85a35186ff1c8ba7a008d038a3942d25ff0ad8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7R2458377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3f084e3bf6001f9431f4759ea34967d9facdc4c4e6b956f04161b3a6b4e599. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7S2405915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55894ecba4d7d7f894e16abe3775cb3b04896c33f47e527656f7122dd55dac07. 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/QZDA42508264.