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 0xce1e1a34e9e458302d44811fc6d022be8b14aabbbe5f3ff45052dbed9baea69f. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/114f323e-149e-4d89-90c4-c127e9b9ee64.json and https://artists.proofprofile.net/proofs/artist/114f323e-149e-4d89-90c4-c127e9b9ee64.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 0xda36e2b2d6cfbc46d31e99ae679b748af4c5c9bcd6196e2e254bfc6ce4295623. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPG2539065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffc9530bd82ee588a30a67439c5634aa5cbdd93a900535a602dc97a0cb7701b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:23:36Z), 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/TCJPG2587611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde282f2ab3faedfddd03fd513c9a0c2f2cba7425d5e597868f0f6528832d4239. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:20:19Z), 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/TCJPI2587503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde282f2ab3faedfddd03fd513c9a0c2f2cba7425d5e597868f0f6528832d4239. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCJPI2587503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b25bed5a2ca17ec109765877232218946f53101540eabdd72955e8c258b59f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCJPJ2504985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fad7d6a772168bb52a7525783ca95a44300ee154b984f3ed1c3682d4fc21f1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:42Z), 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/TCJPJ2541510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c788478365151ae4483337eafe30431fb2a8ed4c2f59cdf12bae79c396d9aac. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:58:43Z), 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/TCJPK2540110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9053485686d81418620459af7427613564cde4555ecf0a5f31f231d857063e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT66J2529455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d136ceccb5e2fdaa6612e089db376804f263b3012e922206c6c9c2fbd948d2. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QT66J2557011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2004bece79c4a4f94b4e7087006bedd4799ad4eb6942cefd64817f578adaa18f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT66J2577974.