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 0x315323beb623a78c9a5bf87c4ab5740f0795a784d070aac61d78c33f193d4cee. 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/93671066-c05a-4263-8c78-4073ef00b12e.json and https://artists.proofprofile.net/proofs/artist/93671066-c05a-4263-8c78-4073ef00b12e.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 0xac6027674c4acdd2cb861f950c2b798c469374dbcba91bdccc477d640b5f1d13. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BGA471716340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb69727c1bc45a47f2b6a3892285de5f3fa0069a16614a19da837a829ee1f435. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:58:45Z), 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/BGA471716529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc9c25af9d66b3209ec0929dd6b4b7e10f0d6376fb3f5d2880479ec58c15610. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:04:35Z), 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/BGA471716509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a2c68bf8b26a02c04802dbf6bc47aecf484e4290721f2a05f61d622a136165. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:44:20Z), 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/GBSMU7426802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951690743b71c36b24c1d65a29f805b985030a3ead747c6ca7847ec0be73f421. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/BGA472114730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4113b2b876dd4019b5ad2351a6b82cdcd4b046d37624de7f967cf05fdabace2c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BGA472114723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd5b7b11a5285bdff8ff00a4b4ad2d28b6096a8bda6204d25b9da7f93c0f896. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBSMU0031212.