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 0xcb32f1bae11b0de362f22f8aa82495cec1f82329be7852d4ca31d989a5e0cce4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46c48261-cfe1-4efc-9dcc-1ffb54599c33.json and https://artists.proofprofile.net/proofs/artist/46c48261-cfe1-4efc-9dcc-1ffb54599c33.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 0x16236ac816ae2c37020817774b459b49d1abd612ff818ade0903023912b7ee38. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE5W32200577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc427bd2dbd894504091057b5ec85c98bf4335ee65d98b46b23d0679aa5e9283a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE5W32200889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3989c2022f6b9a557bae40936b6ba8490056e72c178ac2b977f19e988a215a2b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5W32201796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc50c174e2eac2a113f87c5a73afafbfc0cfa92468fa11cf81bd2a572c06df3. 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/SE5W32202318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87a2cae45160836d1f16a50ec5cb50b204d97553c268e790def4d02a8d3323f. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE5W32203085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806a37ca6d997c56f7c755a82e89dfa9446b8fd910f98fba2a8c8948458c200e. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/SE5W32305532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442d491d5f13ff0631afb22168b130bc4a679eea8d215103cbc0773c38480f7a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:12:11Z), 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/SE5W32305533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efd0788939abe0f3cce50246978a1250fb112d2c00487966d8386bffab8dce5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:05:31Z), 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/SE5W32306181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41953fa663db9f35de7f62596bf72acbfcba412fb1b4daeb9e75205d047b7368. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5W32306794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161b18a2cb9a4912e84ff5559e5e0c59b8295ec0a1a26118b5ea2d2a664e0646. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5W32308891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fc1e0fcb787db9d296a13cc68b85a1f8b2862641138fe307894f3975b921a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5W32500186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2534506a072351b51e57b2f540aea4ac98eb79f2f40f2eb45125b119f554848. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5W32506309.