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 0xa5da3721ec93cc11f9bf0e8ca26de84b23d49fcb3b46c7e1ee9aabf9b1d9a288. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f19a11a-9dbe-4416-901d-9e3c19153cae.json and https://artists.proofprofile.net/proofs/artist/8f19a11a-9dbe-4416-901d-9e3c19153cae.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 0xb91af8a42ec4f1a94c33640500498fc5cf3e176761cf45bd51312144c72cb2fc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFM2570863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e7a684499881c313ad9ca28b8ee7eba1bf9d67cabd77a4279cc13401e898ac. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:58Z), 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/QZHN42539268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f296bee2ca8331bffac02f4fa362971cb51735b37c6cdc538f0873e9f74005. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZHNA2563852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965038696c3046439df497d6dc6458849ca5cbde6a6114da81eca84c432a5338. 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/QZHNC2598247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471605eaeda8e2b5abfe9ae363579be3e5ccc978e438efff65ad62bb240a7fed. 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/QZK6Q2582176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a60ceb643f270ae75e26bcf969624bd75e5bcf9fbc6886f095fb0d7ffc7f5c7. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6P2587761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e399acec3e1897bbaf46488d72ff6bb744dc198ec39bc18e669c144d8daba5. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6P2591120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54cac20e2409103c21d172ed7c91e75acd93d6e958181e9cb358ca6ce5d0dce. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6K2510016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5f9ffed92f5a46b5833946e191f1604322099069609e77f9b39320b6add21b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6G2583153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4291dfef33ccea6a4d4f2a83cfa8457ae570ad8a63b932f500b13367c1703f5c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZK6F2568995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856cdf2660ea0e7d3f195e822bec688b708721f143d4c5d3fed8f982a3a4ba19. 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/QZMEN2515300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce41f44c62af1309bf75d6481f2842be3ce3a131d2d8cd9ef1457b22d8f055a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:58Z), 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/QZTAW2511808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6608324686606946a2b2bd9f27e66ad86ac373be5fef95bad16a50d88d64ff. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:00:43Z), 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/QZWFV2545432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86adf84cfbe4282f04ea1e0ff6f8a6399c2ca516ab86d5be7d28d1e1e726012. 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/QZZ772592026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eab0428d4d36e04bca648df4ba45780ac8b928c012db42e81b79b1f4da1422. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:50:36Z), 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/QT3F62573438.