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 0x965cf96cb4e982927fd8e98ff4a676aabe9419892e371c1ff54d88a303850580. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a1f7ca5-f996-4b3a-81c2-fbd34482f4ad.json and https://artists.proofprofile.net/proofs/artist/4a1f7ca5-f996-4b3a-81c2-fbd34482f4ad.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 0xe9948738fed71aa667a767436eb2b560ace053b4c3000e48b009af807ae25b90. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PLH492152694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2975d6e9187f6f7b6b98acf10797a670dda31ee3fc5f11fe846a48fd65eabea. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:53Z), 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/PL02M2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa982cb51703c3a998628b4161239def43e5c48744cf345cf34d7ca6aaf1c28. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PL02M2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d9f27fdc1155f46dd00e86afc704274691ca82c8a5d60dadf41dfce47b26e0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PL02M2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e2923b6d12689014fa57bf82a192f2cc18b350a4226bba9a46945748c0089e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:40:44Z), 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/PL02M2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9fd4ff0457172f3106f0c4ee56c8bd7c07ab981636e9af356f316feffd3097. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/PL02M2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b9ebc612bccd44c0757c031bdaedf519a1818df22edb68f16c905af4b83a7c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PL02M2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6dc0d352e6f4fa69967c4c3f50baf20ea4a537fe85d747c96f79e5b65b8fee. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PL02M2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e7867737c124154e38e88addc00f12623e7da073e9ff22d1def480fcea32d. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/PL02M2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e21b1b83d097083a70d6c61b6f8062cda6e6a00337ad3fccde406ac4698066e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PL02M2000010.