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 0x27af589e8755e936e3602dd5fb3d4360aa4603453574fecdfd8755c785e1f199. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4413fc56-ec6d-4c39-90d5-dac007b8d8f4.json and https://artists.proofprofile.net/proofs/artist/4413fc56-ec6d-4c39-90d5-dac007b8d8f4.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 0xa45d860a9935da5865654a68249266e1c85dab6c35a9503310ce02d98d39d747. 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/ZAT361600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f25f7cb85ad6456eef5638eed4e8cc7b29997c7866a59dc5e5a9ebb32e93c4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ZAT361600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c819fc25b838ca53c2c7b397f8a5989ff6f5e7f500a849998c0b58fbfd0b1f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZAT361600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b0417e269be18e33fee0f26f8e5b4472fd9a59fab1d5465524bfe75131acbf. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/ZAT361600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28f34920124201599becd6b82f9166c9f398aa21977c61c8e6ead67138becd4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:51:38Z), 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/ZAT361900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57d4d78cd1bf9def2f7eb2063a594e11f7c39bbf7107ad3860a4d6998f56558. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ZAT361900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecf844fc57e9db92ead043b4945930b742d1e61675d84cdc682a70a3bfc0e92. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZAT362000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bfcbb462adfd103a78777d49f81908e005c00f9c3b30f34c247e63ef502154. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ZAT362000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6854bd820e29a29a98175d156dd2fc28e25e1d2a6dc75928334aad661caf737. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ZAT362000028.