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 0x09f1d104432d0c8cd3c59f8e590a80e1f9bb9b4d4e9579a4956418357b8852c5. 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/68db259a-2240-455d-9c4d-d3dccf10c3fe.json and https://artists.proofprofile.net/proofs/artist/68db259a-2240-455d-9c4d-d3dccf10c3fe.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 0x0c2544ecb664d297875110667e6bb52e09b25a5647bf685e274556a642b8d576. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ2015868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c94b3836afd59c41eee981f6729e23ed1f6df4086388dcd3d6b62d54a0ccdda. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:29:44Z), 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/USHM92028777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f605a1df5ca5a9cfb644b6cefe6c9c993c3d4b8b88a4cbb5f0bd0da14450ee. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USL4Q2055973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8d3a450fbd12089a76d2e87f0fe15ae8f2f8c20e6b895cc9598e7a6b2843bd. 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/USX9P2003958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa258ecb9a8cdbea7b0f076f18f6c012a5c12ccf6ffcd4406fb4cb816eba54588. 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/USHM22197603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871542bca5c262648848507b6057910e7f432bac7bbad463ccc3fca417eac3b4. 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/USHM22215942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594f0c635dc4eedee4c492a00643dbfba5b7629cfcaec89fc5d7fba76ae7c1b5. 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/USHM22215943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f7d1579faaf200a2a24d9c2b8dc27a0c8d2cf04464c5456945606bd493747b. 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/USHM22215944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8760e0c462b50dfbf6ab008c714e4bf7534ad51ec46dc9ee7bab7d86896a908. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM22215946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dd612193588fe7272878807c2ae810607f296286627b711677e0a36ca28332. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:35:31Z), 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/USL4Q2208036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f71a2ca7da85ec5399efef7572f5dd4f8b1483f73bc3ac67a33945165868d9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM22364979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91400d7d6fb4f9e79fb6c61abe4ec21adaf117141539064cccd633f41c61055. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4Q2322958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca395db5313bc9473de7b94672884b625be557b6f7ff99d0b7aa832abc242899. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USX9P2306408.
We Were Wrong About Many Things (Imperfections)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83136b1a5cb468a8a7a2b723fc2735f5bffc6ba466a8f101884e82e7a996022a. 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/USL4Q2491559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699018b92ac954c372c0b91c33818ccb01532fb1d71aebe3ab831568469e753d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USL4Q2451678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf78682e822a8b3297ca276aa4a186c6c7b3179b1e864eb304dd20de73cd5db6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q2491563.