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 0xa985e1bc8bd10f55a7d61401fa4708a2a71302697faf2d7612ff7fc289a00f04. 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/61ec6aeb-183f-4e7f-a056-7f51f032bff8.json and https://artists.proofprofile.net/proofs/artist/61ec6aeb-183f-4e7f-a056-7f51f032bff8.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 0xb31539992e2fda4f47d0a1b07b89d0f1ad3aedf5446d3d98587b3da30fe17288. 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/CA6D22400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1501eb58b17643bbd85f51da28479adfb2bbbfa98e8d048692264c28d0714b4d. 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/USLZJ1913551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bef21979d8227adbb4508d76cec7a6c5e6250735faa799f02ffab79439d004. 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/GX8LE2354185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694ef6df1d7229d3352050758386e79b40ee27bffc006fe40eaa42ad56e80ecd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLRD52257875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45978cdd66c4f43df7499b4df05c2a31cedb9babf4972936f63262ae628605c6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHCR2100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29389ddca2b4e59956f26a3e447c2f787ebd52bacdd30f9b8beadf41cd5515c. 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/GB2LD2110050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751c23891974a7c89a3c6ecdb3d0594e4c9583771af03f1d39f258f9cd9277a4. 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/GB2LD2310003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b190fbeddc0e8d9c8bb44f423d690beb92063d126d55b2217af64277c5acb43. 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/AUMGB2101056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8935d327054613c146138eb6583714f205038c0f21115c37d8d712aa8fdb311. 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/USA2P2045622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5710c0df136d70df5e6031ccbaf9d86015c93524bb63cbf2f9bd32477307243b. 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/GB2LD2010138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31262e6606874331c58e20e5bc1d48ae0fbb42ad07d1c91f731825125b3cf1d0. 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/USA2P2036324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2054c997e4be999bd8876b04a3562d1535bae1519620da6156fe42da903d3cd. 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/USA2P2211571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862357802e3c9b5a72fe10df29526c1609b3c9e957ce55c998e5a011ef02c0a6. 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/NLRD51632860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cdf3c261b8603b8ad3b1ca9ee4c2bc8664ef41c95581b717ca46a4095517e9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBKPL2016572.