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 0xc23f7f5a8884ce51b25f065bb7664b1fc6610840588f78d320af817be315723d. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/977c39af-1e69-4757-be1f-cd4fb83a41fe.json and https://artists.proofprofile.net/proofs/artist/977c39af-1e69-4757-be1f-cd4fb83a41fe.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 0x75a5cc77ebab1d19c165e8519bee1e44c4d7b948ad0c04aaa64c9a4eb9241a0a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:50:48Z), 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/DEY472379626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552b3714742ce9e17cb13446695e79c6df153d8eb6337714695718fea6297225. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEY472570026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2554e0ad7d79c84e6a10ac1b7350b01e3fb40a4be0998321357db9afef7ef627. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEY472571947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552b3714742ce9e17cb13446695e79c6df153d8eb6337714695718fea6297225. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:36:52Z), 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/DEY472570026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc486763f7bda22ce339dc8f1c8191e591e19ffaa972a1a8608104b0f5782aa. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:24:20Z), 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/DEY472571950.