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 0x96d029315ef755887e8a528369c62c3250458d7795ccb2b6de3f348ea76c1faa. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2914ccf1-bee0-469e-9783-1882f8b89759.json and https://artists.proofprofile.net/proofs/artist/2914ccf1-bee0-469e-9783-1882f8b89759.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 0xb4f22714b4df7d633f1f88a3913f9247375c5ca3e8980f2e597ca38e962df239. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN52080713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5814d570efb1516db6decbc91679d8add269688006ec4cc5e1fdad4afb3380f6. 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/QM3DF2116336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92c95573d36173e3aea752b57448325dced170a89f838c9e06d7b67805a1679. 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/US3DF2205347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ccfe237ecfd90ff13c3493c263b9720ee7c2e6140ff423577f75da346a67e4. 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/US3DF2205348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f78377ac6f15894488f32722c9579e1f441a433831472abebedb8610db42602. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:50Z), 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/US3DF2205349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b54d337ebf38405fbc5ce739a97f8e9a828529ee3f5fb1af41c227dd2af00f. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/US3DF2205355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ce4dc7e777df77aaa5d76ce3d471609f2995ccd9d5cbbcebd507ab902be058. 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/US3DF2205356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d91ef721219eb7b0ac74c99fca057aab5013cc9602ba2010fa4ade072196d39. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDXS2203456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16dd3f41495788212d4963d73620ec6abd73898a7dbd11ebdb145032724099d. 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/USDXS2301018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfad8a94bb9a57f5b932c237e3ade833d86611e40b0038ba61258b89f0a27da. 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/USDXS2302790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe88918fc6803e8aab17077de6ce0ffa00955ada3f1b6a081e047923390f548e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:50Z), 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/USDXS2301989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a4e863a40ba346fcbcaa7a5d7452285a98fef3864fa858ccae8063599309ae. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USDXS2301665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90f39ce8e10058526737dc2fdd05be7f980ac18abc5c0277419acc8289fbe45. 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/USDXS2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95946c3c44d9848732f1cbc7359437daee51ba7371f7e23f276640bc83898fb6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWL12000363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b9aafe6f828d9f92939f9f2bedb22a0e8158b5dc5642642c1c208f140c8c76. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MXF012300917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6da90efe3f907d86aec73ebacafc651d81476d400d5afcdb68066ab8d838ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152401286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec75b3e9c9a25696eed05bcd65628c7cef0c2cdc5aee3e3115534ab462b969a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZY5J2300025.