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 0xf46419b02dac9544cce6a5a88bc2cfd06f17d28fc6a9cc98b85e4061b6896666. 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/4289dbd1-a3a8-4471-a730-46379fb8f4dd.json and https://artists.proofprofile.net/proofs/artist/4289dbd1-a3a8-4471-a730-46379fb8f4dd.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 0x95a42d1599f51dc8b2dad753f3a4ffc6aeca2fe3504d4427df1cccf4f88f5582. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:49:55Z), 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/FR2X41448108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a55ed47539ea06b9c810a96a00e2e0afc90043dc306b9e8c0f03071f506de39. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FR2X41448097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a0bb143c87174a8cc8bfeb81669e72d3a6e338dd41f3ff502db383e4e5091c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:52:54Z), 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/FR2X41448098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb60580f05d05683e32cdfd99977a060631aac3784e907f10004b61304f70f4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:08:26Z), 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/FR2X41448099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb5e9f49fc02ce8558e28780c839c15d7e63c131ec9c403e99ec68289585731. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR2X41448100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277797b12083298f123108bcc4d8b04679c8f6249db2cfecc96039e541215ac. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR2X41448101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b2b60a3d636407425464d65958b6d1912f8dcd213cd96894c7c38501f7a70b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:27:49Z), 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/FR2X41448105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d43a6b34fb7242f3f59fd455174efb141c9bc8b5296a0f18fd80f16ca935c4. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/FR2X41456773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507f5e0d216a724fc658fca6b83ccc73968884855e7daf63096852836e4487f1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:26:27Z), 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/FR2X41456779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d4b7090974e56c2d86c0bfce89decdd1a1b2059986d91e8ed0df6d48cbf741. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FRX282233701.