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 0xf1164c206ea99127dabf426a7afd949f7343c90e593c48c0a6da8dc8b93f3bbc. 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/2ddc73c9-717f-49d8-ab9d-84f4d2764d60.json and https://artists.proofprofile.net/proofs/artist/2ddc73c9-717f-49d8-ab9d-84f4d2764d60.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 0xfc09b50bae08900b01f268ffb29dedaa3d60957e6f90735df140d26367ef006f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLS6R1716100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd258e71c6798b285107c61d9506b6a0fba8ffc51fefafe2782516c997643096. 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/CH7811818699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309f1ae72f6eeb16ca43dcb19b0e431a2fe5d15eb046623901a89b4ca5c7c9e0. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/NLS6R1874743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744b3dd784f3f7cf04df28889acc1944a38f7715ac4fe423c066e2bdadfcaecb. 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/CH7811821076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a91cddef15af361269e7705a1d66e4ca834e75ba1019988c0b2e1a2bbf2f8e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:03:02Z), 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/CH7811923569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32929f43b092a7362f13116a07e670de23150192e2ee9e36e0bc28d081ffbc0. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:44Z), 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/CH7811923566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550954b999cd12f1f0057e12ae483edcd97820e01b87bbfb98e84e1b4bee02de. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/CH7811925468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a4c02f5c0c4b17b30981291c9913c7d98a669d72e49353b5170538e5033b52. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/CH7811931421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c74693423bb16c456befe935de2ffa8acbfc9eaab2adeeea96b09fbe51dedb. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/NLS6R1842221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f6da9dce069618a3f84a87a5aaaaa3ec93ace2990ceb0e829b906c346d4768. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/CH7811931435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2027daec1c99207e12a97c4600bed8644865eb87778052c85c2f475adef91fa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH7812062133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e5cb6cc24aa474ff661ac4a522e952975cbd5c9c635717c91ed8206ee7eec5. 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/CH7812062136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab53c27ec7c1d17c5e01d2c27f62a770ef5d96c4b3cd17f07c37fef147916a1. 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/CH7812196399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad27fc057295bd67a8ba9f0e80e62c36f59b94cb2e408224d1d70c392a33603. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CH7812234209.