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 0x167618dc07236ecc8564f1163c2d307beff6ef88021e3230d84f360762c33060. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a2818d3-f64a-4876-864a-bbc19bd5fec5.json and https://artists.proofprofile.net/proofs/artist/5a2818d3-f64a-4876-864a-bbc19bd5fec5.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 0x8e41a00272d22b8fbab049022866fb8f0ba40a0db7dbded8570bbc9c9f451be1. 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/QZFYZ2421728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad29cdd6dc0d7fbe7be40be5903c5bdeb0883a8244892dc238b209fad1b423a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB62499259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99c61556b9f8f220a1cddd8cffa1dd76a4f9282511f637b92160a270e25cb1c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWV2433376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7757e403353b6f753d79d920bc60dbbd0c120dc96f3af179f89a114af0632c3b. 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/QZWFL2309390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4627ed867ce626cf2ef94408bdbbaf2c55c64c2ac315754eea63c7c0a09886bf. 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/QZTAY2368800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e55816883169cb7da2a2e4c95e9a85bf069dd184b8355b04f9c52b8275cb3c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWZ2326918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc089aa806bebf8ba5487f768df2da135eb0c364deb56be3c0f99e33fc24cef4d. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZNWV2370405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc089aa806bebf8ba5487f768df2da135eb0c364deb56be3c0f99e33fc24cef4d. 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/QZNWV2370405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb75939ade2ecdb417b5590ece97b9ad0b3dc3840d12ac9f5023298a5dabc2b5. 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/QZHNC2235438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770b661e39887ad54672ac0e30b49693dd80f0dac8e9d6496f89a377b37dc73f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFYY2249325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2563e14077abe29995fcc6de1dec6f2912eff200a6254c065c28d67a3f5b2e. 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/QZHNC2235439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4fb840df635b4aef5e2f5f69288a16a694c5bff75ae4913dccae417117c38a. 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/QZHNC2235440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c940063aea2db68e96d0420d3a92d4aaac622275b9d1fd0fdfbfeed9f93b41e. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZES72239568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9475e5a38228b7216da53a00c12621e01ffa02f86387152b6d01324e6c57e82. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNC2235441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c940063aea2db68e96d0420d3a92d4aaac622275b9d1fd0fdfbfeed9f93b41e. 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/QZES72239568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770b661e39887ad54672ac0e30b49693dd80f0dac8e9d6496f89a377b37dc73f. 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/QZFYY2249325.