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 0xc54028c55adf5fbeda2232f008d30430e4d93e1796ba2ccd2c5ca82d07aedad8. 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/7d09f642-f80b-4458-ad0a-ad4e7ba99ae7.json and https://artists.proofprofile.net/proofs/artist/7d09f642-f80b-4458-ad0a-ad4e7ba99ae7.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 0xb63e2b5f5f00e8422703b353058e849320e613bbaca8ced17de5e41c72aa3218. 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/ES71G2238261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84089ed316e1deb08242ab84b26bc4af4aeb98563f1c6f5038b46e9238eb7764. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2005146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bf1f04570e7a66dbcfdb5e201e1146975b74549cce3a44a7ef664b12cd87ae. 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/ES71G2051382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd900f5eeabb05146050de8608ccdb2b2f77c559d634fb5a86394975d7a4390f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2329369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63e2b5f5f00e8422703b353058e849320e613bbaca8ced17de5e41c72aa3218. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2238261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad83039656de8186355164400112901208fe1cb1a5985713285dfd5a46bc93c4. 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/ES71G2219974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a7997d61b8758e2af6ff17f3f24b0b95b17083fd738f17681e6a667529511e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2282527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d709e0c11af22170db4577fb153a5685fcba538c2e357251abb8d84760a8b4d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTVM2138380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4e41d64fbfdcec8968324a0f55c2753520cc9c6185309c0870ebfe0b10eccf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2110592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7de63637c4d130a16e3b748e24a8f19af1cbf492bf2c9e4797c9c4fc718947d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2106438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92232581717517b9057f38360a915076caa3785db3b2113d298c2d4c58fcf62. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2063922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55caa947b71a827bdaa0f8de46f2aac336c613172122eb9269a7fa17a2d9d583. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2055710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bf1f04570e7a66dbcfdb5e201e1146975b74549cce3a44a7ef664b12cd87ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2051382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8777cd843956e0c10475c3ee93b795b1c9dab88f4799560ad8b3676a5c4446d1. 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/ES71G2500882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b354ea900d2792b3b1f6b65dcb48a7ef62ded6e32a427803366f96a8e8111bf. 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/ES71G2106284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccde28237918f5e665bf5d5833638e9a8125aefff312b79b60aaa29dc4ef037. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2431364.