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 0x967bf880de6ade6fcee1d5d78a2d1ea73cc7048f8cf9418828231ed9aa27c7d8. 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/e272560e-691d-4d8a-a02b-433c8d3c34b6.json and https://artists.proofprofile.net/proofs/artist/e272560e-691d-4d8a-a02b-433c8d3c34b6.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 0x961ddeb7ead483e911d41f83e7b71e76ca80207b215d3e3d6914f4198cb48ee7. 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/QZWDE2337404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f022f961a7c925e7a77abb22927271da59b9aaea571c4de6f20ec07e38d5625. 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/SEXXC1000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d51e31d7c3996d5d7d539aba800c7998932b9e8efc7ff52432086dc9c9361d. 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/SEXXC1000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece4667020be410519b7130b282f2d307e0f22258165dc439ec5832aedc889f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEXXC1000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354b93b3ec8edbf11d12eec38fc650d348662ccf162fe125ed454e69aca83996. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEXXC1000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca73e6de3bece705875770cd83411a55cac143f352848917f166d764fb1fbc6. 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/SEXXC1000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e20346e341b37a278c2f7547f3f3f5339457a9afc6632b13328467e5dedbbc. 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/SEXXC1000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fa7fe95eeb86113388d49434f618aa908e6ae952c7aab11bad3d28284a5f8a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEXXC1000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bcea520f2c38f50ddcf94a2354ea90e5cb42db1b0ff9fdf72731f78364acce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEXXC1000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a0945176db7bc0afcadf0e3d97ea616438cca5a9a8215f54ecaaaceb03aaa7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEXXC1000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd59890a43fc3a13d860c1b66dbcb2f07121da4f90ebdae9e12b9933971a627. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEXXC1000110.