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 0x14306506e8773d4b7672247c7a28236b7ab12b508490717c05286ecb267d7c5d. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05dbbbe3-c33f-44dd-86e1-65a63fbce3d4.json and https://artists.proofprofile.net/proofs/artist/05dbbbe3-c33f-44dd-86e1-65a63fbce3d4.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 0xe218aabaa22acdb72c9b543830ddb99571c80f9e3f6643ed7d53df74d9eb9f8d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:15Z), 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/GBMA22495000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe4d1c929a83ee1d5ff2d6f7bd8fc904a8009a0428c8410eff98c3b75553331. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:49:54Z), 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/GBMA22495001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdffe52737ec246e7938b22b6640b206719de803390d4f96a7cc79fdd47cd3b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:10Z), 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/GBMA22495002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a5f6f8a14ad88307440cc80625c1ad1b6f10fe17ee5305b7474990c9373267. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GBMA22495003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83df994f84bfcd781f686b9cd9cbb36a578101d33d9b4d5ff4c537c10f1a2ac. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBMA22495004.