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 0x459b188e56b2902c26ed0d56ec9101a6061a0f171b0845be04c00a3514327fc5. 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/3fd1c47f-9be3-46e1-ae98-cc5e1c149cee.json and https://artists.proofprofile.net/proofs/artist/3fd1c47f-9be3-46e1-ae98-cc5e1c149cee.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 0xe70a5e059a1c0667f679be3acd06d146a585f28cc7dcd74b81876834bb9a9f33. 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/USLZJ2440798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4591b087092df591ed375822fe1c56a49fc40d74c49c287bc9e09b46677684. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:47:55Z), 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/QZTRX2473149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6bf07773ba2ac29c93fac1b7067fa9950ee24b8b9e50dc7367ac0259a66eb4. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/QZES72556787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91117a870c43b1dfc29e2f5e735ca5a9c517a532500d9aae1a81f10214bb5ed. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:33:53Z), 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/QZES72556789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ce39562f2595e390de6f0f9ee980ecc65cc2b16a5b63bcbcf2fb3dd5e94cc1. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZES72556790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefb951a299bcb9c291ef4bb16cf2ced7727e217a478cb0c7b17913eb2f60590. 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/QZES72556791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c3c549259536eb9eb119d40e46f4da947f379e9485f7e3755b7fd4c05a67a4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZES72556792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70a5e059a1c0667f679be3acd06d146a585f28cc7dcd74b81876834bb9a9f33. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USLZJ2440798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ee19c5807462106d8f0c0acaf50ec92fdc9d5029d89e8c5b3a84580823e58d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZES72556793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f6815add76aecbc9f319fd70b7568aec93898413463ad503fabdc349fc511e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZWFU2563212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ca8b411eb3a03a08f2663d98fd858ec3689b202b68bf4a01ed576252ebd69e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZWFU2563213.