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 0x20584192fd2696a2d64e910182d5ccb78612aef09f3df37bcfd53f881b614a75. 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/430d2954-9e3a-484e-b307-ccbdfda47a74.json and https://artists.proofprofile.net/proofs/artist/430d2954-9e3a-484e-b307-ccbdfda47a74.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 0x1f580faeca057a8a8df1340b935037b683683a8891222e04381f3dd364d0c939. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ILTON2300278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313437403b894f7874676a4708f2d17e046d03fc0045d62a8f04d45c160d2006. 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/ILTON2300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb432b4f240898fc885fb58a266ed4e32f5db4900290a40f93a37b591311b2a. 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/ILTON2300658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf9c595d6f9ce1daa496f646ae1d8d7c02bdf7606061078e618a14bd8bc49b5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ILTON2300659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61ea37cb33e9bf33fd474c51cbc7af12ba53cd9d3e69d4ae0d9a567ac5d65b9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ILTON2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49537331f9934d67e6072573efa11e99fe08bb527c83d1567335bf4bde1b082. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:06Z), 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/ILTON2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74c809aeb4eb6fa8c09f58d9b42e1f04fe5583f834ed2f6603c11cfcabbb6b0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:17Z), 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/ILTON2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbe62e8834cf5049fbacdcec0869d7e7582c7286b0abaad33449f4894925515. 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/ILTON2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb068823dd35b46310cf884d9ee46324c3775b5d78ae882fa9b2d9adb36cfe352. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ILTON2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd4ec73e94720bcb6eeef998f9b76467b2ad16af57a8c6128880b9eb4be184f. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/ILTON2500863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088390b07d91e490de07d8870a750a3e9e0e3ce5a34df440f116811884700173. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ILTON2500865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd4ec73e94720bcb6eeef998f9b76467b2ad16af57a8c6128880b9eb4be184f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ILTON2500863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac8c05b136e5adfbb466c991af769b77fd19b226907da0c00086a5ad05c5779. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/ILTON2500866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a542289b681c3af87c7f08ef1601b90813789b2936659f7619325089d93ec65. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ILTON2500870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec830c5c6d9c29f9f8e9dc0b7f47dc86884f887b81944a91b7a5808a4d6b817d. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ILTON2507805.