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 0x31caf2d941095783974c7f86e269c89f27bcf6a7f171fa7d5249253653197a1f. 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/86dd6b46-e447-4ae1-a1bb-a99ee006fa3c.json and https://artists.proofprofile.net/proofs/artist/86dd6b46-e447-4ae1-a1bb-a99ee006fa3c.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 0xcc8bca2373612efc3624430cbe72fdd5cdd4a43f61e50c7e8ba7f163dc69accf. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:32:51Z), 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/SE3OH1632157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9df8b6a7eb0a7bcdac4c475f774c831525444b76c28151974103391acc395c. 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/SE3OH1632160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8356af2e39e57809f50b409376bf7bb9c4e4712135380dab19ea5a92b671595f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SE3OH1632158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32010e0bd85ee81f8ab597bb3a720241a6ede471b592f14abe8599dddfb11d5. 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/SE3OH1632161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf133d6fe6f22d9c70468bac5f1bb601d39cba2c1938c7ea5f02bc0b3665ff69e. 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/USHM81807624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e2bf0fc246d420123884733e0eeeea7b07ebd81a82c629e0fc51a3cf3350c2. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:50:13Z), 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/USSTT2200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41686b2b6298c8d8817846763c551818e75c31c802cdf18e22e4275789870afb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:49Z), 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/USSTT2200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe09a47e935265733d7618c3ae4d1a5e2d5c668758a48eca4582d283d5f7e4c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:58Z), 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/USSTT2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a04abb7e33d791621a2e197c96610410b688b6e469f758b78091703eb4fe3b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USSTT2200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cebdb1616d26f586d2601388d3709576b9ed4108cdf23dd76542348f557f02. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USSTT2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e46827235167a34747f1cd9f3d5c289f680f345176a65414d1c1ea0f35a3c7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:13Z), 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/USSTT2200054.