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 0xe311a510331d3a0c446d22dd0211a2685a47fb748f0feb14e9e7e1b1ae3e8602. 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/4884a914-ecc5-4a4d-b7fd-2643a01504c9.json and https://artists.proofprofile.net/proofs/artist/4884a914-ecc5-4a4d-b7fd-2643a01504c9.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 0x68b66ce09481e4a3c1220d2723ed1a7d325ca3830077ba805a7c68577e5e990b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USSF19001201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf518004362dc534c6af22fef8ea93489f8d1021b99b31329f5cf095dabbb01. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USSF19001202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c16ebe36c4a3eb69e1900603ed4c72e499da91ae53686de49dd78053791fc9f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USSF19001203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c73400f5d4ee6875fcb212d7390f5c9002dc87856eea06b6f310db49a93aa8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:02:45Z), 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/USSF19001205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a855e6ecef879d0f14231aa78cdab20213f181ffa65c92a8953f5d9592c6f0. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USSF19001207.
That Train That Carried My Girl from Town
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af7b7641b4c1dcd30ccc1f55512c3b1dd251fdbb4b19756dffbe80e12be4daf. 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/USSF19001208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70e94ed4b29665d9d6ea60659945a2076c17191268ca65cd9bf7cb2a4df29d8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USSF19001209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929e0efb2274d903f971269b5cbcc57a960c31437f5b9f33da3f69a0f89401ed. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USSF19001215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec453fd5d0e5c695397d891ac28a5f076f3ff994bc231c5390cf5055216fbc9. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/USSF19001222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ed8c52b828ca6eb07c54a0b5a1c83bc17fd81311a13185fcc1ded290a4db59. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:10Z), 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/USSF19001226.