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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedcee5e5f515cc290161f2936d27af241c17e0a2b45918e0d92db7e89a7f581. 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/000a0873-3feb-4995-b78d-47b66f77b1e5.json and https://artists.proofprofile.net/proofs/artist/000a0873-3feb-4995-b78d-47b66f77b1e5.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67594107f00d4b60cc7b148f8f0d0c3a80f3969ce0ce96b5ca4f62277afaf8f. 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/PLI367414220.
KOBIK PRESENTS DROPBOX: DIGITAL DELIVERY
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9051529c8bb529ae7763db8e0877a5fdea9fbe7304f3b59087fa9610e553d698. 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/PLA552200781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57fa14dab5a020bb69b164166b053192c20eb44173b2dc2fd31d99b106e602c. 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/PLA552200774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf490aa4e69fdd4a9089788c66a3115c3a8360bde9319116de968b3e078234182. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLA552100321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0346d57f1b40ab899606c4ee6e8e7fa0ddce6ff85fe9161c6b63b236ee5a634. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/PLA552100325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f48100063c6a4c149c536ffabdda7d0aa40667f79f4f738a3100c9bb00b7f5. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/PLA552100322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf490aa4e69fdd4a9089788c66a3115c3a8360bde9319116de968b3e078234182. 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/PLA552100321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb67d895c5265354441b467cf32ea38d45c41bd862f35009d5889bac07e693e3. 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/PLF242413425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e974f1d789bcdb8239de6248d9bd67268fa823b28a4bbaf944b96e9b1a9508. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLI361819120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877e7b609c53a585247bbe118b63b93623b5c10b8b050f0718149a0bdc6a432d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PLI361819170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb136e01b64cb52299e94c0f019a257c0d8577ba012cf2a8366d989a674661b8b. 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/PLI366872550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1e8acab2e1fb2de1e3f95a830341306652729c81487e476a1c7f6bf9aed2b9. 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/PLI360172420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bab66e1e63944761241a0baad99297e417bb8d077793c5d2ab4bd3da8157a5f. 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/PLI366775571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea90fcc340df2bb88970eba22d8703f98c1ede20774264b4b513639c6c3c2a5. 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/PLI366775581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756219f494e36869cd1c9c8add03ec6ee6473cfd081d05565cfb996b7915c06f. 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/PLI366775590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7724139628592280181786bbe41d3dfb42d94b0f6e46d90129994422a634901b. 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/PLI366775600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd536adf75acc09414b2ac1eae82cc1d879437bce34944f1ff9fc7088797d79da. 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/PLI366775610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67803456386c773a71bf604b94b34b521295f0014a0405ac3d3941b7881a6ae. 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/PLI364137750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5410abc87b23dda9b0ea53df95dc41dcc6e88f145b056f6a90ed2cb3335e8636. 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/PLI366775660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b74662874c6e5b2544bd89c8eac4a16169303f9f7da0aa0b1b6c21f7bfeb5bc. 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/PLI366775630.