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 0x99c42227b298877f6a2895c7cf832a7593e4418ba20c2ab56ccbfae2960e21c0. 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/273c998f-85e9-4b81-962a-a3ebc7055fb1.json and https://artists.proofprofile.net/proofs/artist/273c998f-85e9-4b81-962a-a3ebc7055fb1.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 0x0c765cc96edaff5f82e67bb87c4ea789173e87ac5cd2dc518839208fdef3caa5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:19:01Z), 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/TWA239500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a32aaeeeda0f0be5456eae667c5dafa3a27be04eb3fc8416cf60a84433218a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:46:10Z), 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/TWA239500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20513b042829617b47a7784c9dae6e4156aefaed88f08ef20ea36d0d1345f1f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TWA219807106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9130ef470c5023b4cd9893461fc5cded992a2bef583864bca0ead3862ea2e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWC230155201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ba69b19def9b624c21170cbf18d58b3e101cbb22563905d0f0a28720c4e910. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWC230155204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4151aef32e887cb0e4b08c7b78048b1183b924206e6776b6ad66e660d281824f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWC230155210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae6930964a0139ae10389cac8f52dcb1f0617830a5716634124b45386cc1121. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TWCM32303002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf334f0eba658c8cd2c19d3219e519df5382d12ae0f7d25bc7a49f604dfcbaf29. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWAN71260018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8931fd46ad6936ce5cdb33600c37faa0dbca51243be51ef0663ac5c3c3c713b6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX452369311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c65a654b4a7096bf62ed5a27713b019bc4bd952231ad1f22d99285d8ab723b7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWE870505108.