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 0x50b21f0dce29e3d3f8b9688dcc54e930d8abf1ea27fcb1b7997d3bfaf65022e5. 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/bf573746-ae8a-4e7f-abd4-dd2b00c37c22.json and https://artists.proofprofile.net/proofs/artist/bf573746-ae8a-4e7f-abd4-dd2b00c37c22.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 0x309c99de5a5480bd54b6fe006ca28af6b46b8725d8018dc8ec6e4ee84c7a5515. 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/BRONC0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543290bdfa87248e8d22d9f65bd1fb02cc3770f641d9993f002b7e53a7afe8df. 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/BRONC0700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f07e559b0f08ca2eb302a50f5c2143f246e86219df6989ecbdf217f1a6bc8fd. 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/BRONC0700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396b2b0c730fbe9c4a6df512e22ecc7ef34967d73be7757f077b8f9c251e20a4. 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/BRONC0700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67b2ea284b09ebaab8e36b435e7ffd88bd23c78e33227bdc4248eca80927d45. 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/BRONC0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8aceab08bacc436f9edea135e12f657516b53b8d0074d367d49e0a2807ec220. 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/BRONC0700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b205c6fd44f328da4579ce81b30991e6bd0ec410044175a5241c590ab5266e. 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/BRONC0700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f07c3f8efc9f45b64f37c6bae0a8448957235a2cc8fcc0764d9ecdb84e66b67. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRONC0700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4fda58a5c011b0f9452554c47c19e62606ddcb357d1426c733ef4e746778cc. 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/BRONC0700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0983b1174ee4cc5871761bb448338f53120739a77ee22b2608b35981d07863e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRONC0700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b16104c983ed6dd37f559bcc5302e55a26569abdafe918690efe336e882ab7. 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/BRONC0700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b36cd0547e9bb6707e1ee991c09bba10690b24755c9440f467efdf7aa3b12b1. 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/BRONC0700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ebd4dad353f3153e1614c5d0d04b94b8a0842bf6fdb3dc13c24997ea139adc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRONC0700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f25841927db9306033f7c7a0782616f52334747602eb947ad909a6fb9ae4d6. 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/BRONC0700006.