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 0xf083ddbfb85eadc7cd8d2ecf70217ffbaf9fc330f56630d37fa6f6ded94bec05. 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/9dde8040-5e57-4294-8aed-edfb5f7d1cbe.json and https://artists.proofprofile.net/proofs/artist/9dde8040-5e57-4294-8aed-edfb5f7d1cbe.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 0x896fa86471a7adae23f4f6c5c5bebc4f5119fe61f270b9846ca64f30ba78a6bd. 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/GBKQU2370676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1180d7d4755b969b5c4ed0ad84409cb25b482f25c203af3fb3ee318c669e8a3b. 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/GBKQU2345696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0e682e2894eddded04289ee107ef6e311f4c21f3886c05f776f07e7313a00f. 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/GBKQU2373669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77e389ea1da86c3f1a8f4297023de36aa48c78c48e92d8d80546090244f5e1f. 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/GBKQU2357511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ac8f070a1fad98c7f72fa6881b9e7de19b0c63a8142fbca8fdfb3d5e950cfa. 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/GBKQU2348817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d116c9cb4d01bdf693692818035e962cd6db2e9e66ed80ba2b54b19cf68bc77. 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/GBKQU2329308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131fc0950bda063978b50e5bdaef768311ae6543058925566d977efdec7a7f28. 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/GBKQU2316845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9943040101976596e1ccd2288dfdd057aa14d0c162d02fc2b36bcc179b8e9a. 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/GBKQU2303804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a5be53adf06229a45ad54cedf8b26dde621bf82cfb17e5f9998cf80841c0b6. 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/QMDA62275832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90508619f2cbf658b5daf7488d3cfaeeade24d71cb70404c8c02414d08c9cc56. 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/QM6P42220774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682c515a831d0ca08ea6e4470a07515f63e52e957ee55aecf037986e10a216a3. 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/QM6N22298934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b6db22aa365341ba0912f9a3f0f7087f1ff9695704c330b05a2ecd87d0345e. 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/QM6MZ2260113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa043b7af5620e5d7a7ef4fd6034da2f1e700b814a75413a5c94a047793384dd4. 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/QM4TX2279455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae39029b0bb2380810f12ce208702d19b07887d16b27c38cb6360b1a4321142e. 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/QM4TX2209001.