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 0x8dd1db576461c7fee5f2a9cc63f8f7344d7aaa279a9f0c470eeb1ea6614cab26. 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/9d4f6e30-86b5-4898-99bb-192238399cfa.json and https://artists.proofprofile.net/proofs/artist/9d4f6e30-86b5-4898-99bb-192238399cfa.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 0x4191a2b42f00057e6f5056bfeebb497bebcd55e253a7cf1f8cef562c735aa5bc. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/US3X51019502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15de126b8296026a997205e2e4cce2bcaaf684f4eaaf01e55da2c3901acdbe88. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/US3X51019503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3e6c105c8bdd8c4290abdfdc0a9a96dabad09693590f79748509ae60f969a1. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/US3X51019505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ca0d0a5f43a8943ad60e68170a680b8681c6bf7aa05f6b281289b66a5818a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/US3X51019506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8929ea24c2c0d3434e6b04eac04e041a3c34dad73e6167f0c1c109d09aa7e90. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:56:09Z), 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/US3X51019507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5626f35d912ebd5fbb8aea1a7b2bc36963155e261fab658cbe6bdb0da26c63d9. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/US3X51019508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ee36baba47d9714e48cd809975e938657a5057ee9b08cf3e69cae3fc74bb40. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3X51019510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f470814e14c3736fe159f203ee431475d662e9a8229cb0f63cd86589cac48c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:02Z), 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/US3X51323703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c7e96f9c0e9011b2604213ab8f0df6021b7686b139fdd2e5847c14696ba7df. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/US3X51019513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75565a85b5fb6d444e336c00eabda147ab873fd09e5ab1695d94a6952cdc276b. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/US3X51323704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903af3883621799d459895afaa3d704148930ffa035f963a61b1bf6a46f4a1bc. 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/US3X51019514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f1df9890fd81c2fdcfe189da551a21a6a56612d8629b685c789277a3438146. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:14Z), 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/US3X51323710.