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 0x3aebf972ebc2b923c29008b8fc23f4d8c7888b5fbf1156dfc9d45ba83900e97b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecb2e96b-5153-4294-81bc-7e3839111f3c.json and https://artists.proofprofile.net/proofs/artist/ecb2e96b-5153-4294-81bc-7e3839111f3c.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 0x13040ad98f4a4bb82e0d87c8f9cf1a5d79c11b152ad6b745bd414125985224ff. 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/CA5KR1568134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d52a3cb5ce1cd2c9b0d68a8beddc49f0d1b2845552ac04b8ae4d539610936. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CA5KR1568135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb5c477259e1fdbc5e612526c6395f45242cbae43d49609b13bf2f197e562ad. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR1568137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8530d9f57749f566e9e90d3d142afd5a5df6de46b62ebd2e7a848c4ec99bb8a. 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/CA5KR1568138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f14bf4ef52198fa7ade6c93ca682987790a7467dd2268148de75251bf75986f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:34:50Z), 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/CA5KR1568139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97504eb49ad1747e8d3d0e3732a21cee0d23e5cda7b7b4165622ef60ee951818. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/CA5KR1568142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f970b7f04582afe15e029ef85df30549b46ff428b56d0ab9ae83159fde5269. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CA5KR1568143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28d8cbd244804fd201887593bc55e87a9f97fea8951d66af93742793d95647e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR1568144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a76331c637b4b8072401b1edda00b862f07d7511594ec1ec098a8748f7fc9b. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/CA5KR1568145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf644848708958ecb07452a258bd6edd7adeea043cbbdb23998af010727890349. 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/CA5KR1568146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233b76e5220bd89d8b6af31bcfd7980556303ee46b57056c87a9bb13e40d4b78. 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/CA5KR1568147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100849c456725a226d0110c4fbbb95c060aa75f29c2835a39abe04d7d606306e. 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/CA5KR1929749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cff89591e4768e5aa3a98186052c69a84711abee75d47b448897439531986a1. 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/CA5KR1929750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92854e288d3a9e8ce579881fd0e03d814d663d4b9ff72032ae0a3f4f591e3048. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR1929756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c4c0a4d5316ec614554969fcad63a27376cdcb4d15a401188090a167689869. 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/CA5KR1929757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021eedbcb043ac2217d228164c4d63286b19ba283f2d97993ace4c207f18177c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6I32538043.