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 0x76d845c33f22f461c0b7bd32f180bcf6cc88160a5d00cf681cb4af50a0fc00cf. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c27d72b-b4e4-46fd-b448-5442b06a6403.json and https://artists.proofprofile.net/proofs/artist/1c27d72b-b4e4-46fd-b448-5442b06a6403.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 0xac8ee56ad2a20e55e2bea0a193a79080c15308c213a2d097b950bd21f1a80516. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:50:19Z), 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/AEA148001625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa335709e17bfdd01897e64c4edf8d8fe5ff13ac97b972b164ba415fdd972069b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AEA148001621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4c7e3a0ff143c73ef7d8cae44ffbe2f3a2b4fa3b175404b202d22084b5c02c. 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/AEA148001630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486f412e75239f1667c9cffd921921b922240574f192160fbaabf4884d9113df. 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/AEA148001631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3aec633885a18f2bf8b5ff03820b03af5f8db1cfc3c3699d42f55b1a6d28c7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:40:09Z), 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/AEA148001632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5da7792ad312739a137f8ac149bc38a5eaf30127ae2034a98661a417c935b6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:23:12Z), 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/AEA148001622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb826e230c9b22ef9101a8106e56580be14a3fb239dd3bd169d75359bde7f3b. 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/AEA148001635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5e4a66f4200121e1eb7c010bdc19a80ab112b506916d6d84e003e1aa58ae2e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA148001636.