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 0xd55805e5616b2867c6823e59d908a4a770ccbf02e1aea66f7790c46da20b9fa9. 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/fd20f816-4f8d-4d08-8f74-d84020724e45.json and https://artists.proofprofile.net/proofs/artist/fd20f816-4f8d-4d08-8f74-d84020724e45.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 0x4a9cbcc870b5613847fe3a89da36a56e35fbdb31e1de8a3160724fdc31532f34. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SE5752448706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256bde0049b9914eab82afa5b3cabbf457522f3ed7105557fe265e7d43d8b6cd. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/SE5752448756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5416cf899471be10438ed56c92e448759ee57290813b9dfa324dc19dddea990. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/SE5752477716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7628359def750361785122e5f0434c39164c5c4b64fb18966745c7aeb90eb3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:59:39Z), 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/SE5752483873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c5949ed1288d798100ff242fa85473630f13765a6180c0bbd87465a3eb556c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:52:20Z), 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/SE6I32469380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a27d893b0567ca1fc5b146071de2db91419443750d3fefe018d4cc9e333888. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SE6SA2454082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde3c2473c113d43c7a311fc7aafad248bc22fb648247fcbe5efa5a286c50c11. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:00:18Z), 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/SE5BU2503679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ee0d788c0ccfd6377f7fee495c1f825ad42201c68d2d92dd02f1a8ad4281d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/SE6XY2559151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dec333dfc27991a969c3d00c7d2f40a5ff3a0bc7a1abff67aa8e9304a7116e6. 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/SE6SA2548425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35e48305b9e5e9e3e06c5bd89b8b931b3856d093e62f8e331a9dfb83b55045c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6SA2548803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c62d8947e2e9368333ae36281cc54ec02f37be62c15a64538958e2ef42cd99. 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/SE6SA2549473.