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 0xe014f3490c81bc486c1bf1e878527ff5722de0b20d110ba3798c6c01eefa44bf. 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/bb9dbd67-a245-489b-b261-0e632c07820a.json and https://artists.proofprofile.net/proofs/artist/bb9dbd67-a245-489b-b261-0e632c07820a.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 0x4d1bbdda318709bdb7430970fe502d86514024285114447f76ba5f0687613146. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAHS2384184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7755d842048aa93f3aa2a88307338be6d7397bc268da40275e3720f9f26902. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/TCAHT2318093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85499ce7a9681ef55cf10089f91320cf6ce7a591fcee4f8a338013f408842f4. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCAHT2318106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eb53523858b44ac527413fc250de4f81c3dd4d96e1fcfe00e1f300423bb2b2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:04:33Z), 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/TCAHT2318127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca18d2e63a366577503055b6295a59395491eabc01d9e047c7aff865c7d6a7c8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAHT2318174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7a670da304a6e52eb3dbb75ad122a846b646770ed89fd7f4c9196127c54d18. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHT2318217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650ef08c41bb43c84250c7c9ebf6cb612bf414d585307a7c320679abb7032edf. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAHT2318392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3fa39c21c4a67cb69bfa71ed949ce276bfa167cfa740f7b2149dc3b191b1d8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:00:21Z), 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/TCAHT2318490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818547bb264eb4f36b69c1ffd84a20b1e222251869ec655c2293a8748bc7d0fe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHT2330171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa0b948a12b9210a084d55f4196abf2fc82e70f139a849711ad3a1b48ef9d86. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAHT2329683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd310e7efd33fbff8e3328f865fdf6935171616794b114045913ffb66b55eb5f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAIQ2416351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dbe38b52ef4c365b5c0e3ca6631e0bf59d120a369abfae7dce003236debb31. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIP2416357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcac2b85e9a278c7ae3fb7e27a20348f3dacce6e9d16495d673df714e9ce3d5e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAJA2488849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718ff0b7d1673a8e0698d16ec918e5c1c15d23071a6aeb0a230ef57ee21f03ab. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAJH2521585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3ce272c154f246016e0b84671e5d415ca78dd701638784e427f3ba29d4f1cf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJR2595050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed876f78f01b3f6be4ace3062071c449c7f0b726fa6b0597b048f0c4ce86dd50. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJX2597227.