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 0x2997860cd12d21539a0e1332b605f09e7c106f32df21f0ed83406c3289193b67. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9dded45-81e8-4bd0-83cc-9d68ec7d2f69.json and https://artists.proofprofile.net/proofs/artist/e9dded45-81e8-4bd0-83cc-9d68ec7d2f69.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 0x07ba6654481fbbb6621ea39ed57a3c76baec716b3b0496fdeb6f32b1fd46eff0. 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/QZQAY2511249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b18ea1d2e147163e24a5c7addbe80c3b6598644ae3454f0591573bfdf1865b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZQAY2592671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5e50720a3559375c66a39e67ddf06ed064eb1cce7ba52f3dbe7c666a97ef0d. 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/QZQAY2524647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04deafac5137a5bec148dc9c33c30f2d2acc1862cbfd6b0e638c38f47f16740. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZQAY2563595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c218ac05c8c73de9462e6502108befa9089336f0b897f4c2bec52a3a9734e6. 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/QZQAY2583064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3283b97f8bc8317c0b00a7a7794194e6f30b4dbb6191bd196f02c7361242556. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZQAY2547884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b88376282920f838bdec94e4e96d0fe738af3d9af0c05c2f03bcffd2dec01c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZQAY2522802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0995f436da7a2a2c5c6f2adffe48ed6dbd486d3dec38c8179842cac940c966. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZQAY2599207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72477196ffd64b85f2768a6e865144300f6e2153d9607530d1db88be5eb29b9f. 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/QZQAY2591518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f62ab775f6cfc24d670e5f68e7b4d19262d7cd7d6abf828ce24c43400c3ce3c. 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/QZQAY2500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a21732849254cee03976a2c4a2c6bc339823306fd582f7ac9a8ca71f9e235f5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZQAY2550792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bf5511c6789900727f8bd1d45e70cec00f6a4ae7b8e3e4433877d941c624f9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZQAY2582664.