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 0xea9ff034044ff6227e7ec92e0d8eb07bdb8d7ce434c842916ea9d2f00348bfc1. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a14f5b39-2661-472e-a467-4376fb52beb3.json and https://artists.proofprofile.net/proofs/artist/a14f5b39-2661-472e-a467-4376fb52beb3.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 0x0678739939e2c6c0ebffd315213e223c0f30d4fa9a96253ba4b645b9f22b482e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX3Q92547976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe979f70191e2bd0dd51249a19b998479911e8673a6405ef13e58c2e1d33b73b6. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GX3Q92547977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb98cd788f8c5328d966f870ff5e7e7c510cd09291272103fe93e90ff3d41af. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX3Q92547978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cb70ca9916915903667425e136380d0e0f04c5b7797c3fe23ef9de2f126064. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:10Z), 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/GX3Q92547979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac301f312eb5879891b0056abd187af0801135209eebd497ba04fecfc8875cb. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GX3Q92547980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445963c2d2aa92c95963de8a086965e6f056a63cd18dc367a5faf0462fd66c3f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:05Z), 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/GX3Q92547981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d19f8e089056c0f63d5ed02fc652c496ed03155f3fe8e6876431a9ebf8cf125. 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/GX3Q92547982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f28111d684e5e672bd8fbb214e2086dc0ed949048e0880faef03fe6e2e92ec8. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:12Z), 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/GX3Q92547983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3075fa37f0619a26bc9ba4b9d5c4bdc96ad5ab9d225300d17544b2ffe85f194f. 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/GX3Q92547984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970f36de19f73b9359515864afe099f894e9d01907b9dfdf1ce3b458ce561e03. 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/GX3Q92547987.