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 0xc6104befcf030e6799fa31833f00ab716beab197e6c4ef18e3de627f296ad5b3. 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/7f043d35-2c63-464d-a77d-7e8f85581183.json and https://artists.proofprofile.net/proofs/artist/7f043d35-2c63-464d-a77d-7e8f85581183.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 0x22a5e2f07758e3bbd1200e6123e745db5b60e0f27c327228b041c593af352cce. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:55:15Z), 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/QM3DF2183805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83fcc21253f30cabd25c5f12a6780eedcccdc5215d147c2d447be97a952af98. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2256200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b1f1cca15a453b1c7afecde49da3b3e898e85f3823377a28979e6544d21e7a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QM7282367948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4dae3505a62eaec69b738d0bc01969db93d93dc3c7e64695d8962470516a64. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QM7282367949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd643b1552c1338ac524a319ae096b1a6f5f6c66c8952a765033c062d2b762464. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:43:05Z), 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/QM7282367950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffc722cc5c0af0ee0facb4b6990ec696f76d42894b3a5b3b80ddb4cc43716b6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM7282367951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc2e22eaab3d3a04ee802b02c6c6bca0ae1aa14007fb58baaba8439698b61c0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:33Z), 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/QM3DF2215103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4305258ff604460ad3c69cfcb5b44a028557401cc993e63fb31b97edaf4da31e. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QM3DF2215096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95450e6f8bfa7d77c320c6ddce3b8a5e39de508f9dd4ad975d581c142f1239c0. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QM3DF2215099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2850777bf089be68521aa546a424bf10aa8a06b964a84f6efd1f414244e5383f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:10:52Z), 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/QM3DF2215101.