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 0xeb47af1e32b920f278a43a83a9fafa328f0ab3bb67565cab7a5fa52c3d57fce1. 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/34c71c74-0fee-4e3f-afbd-c67dc17f39e6.json and https://artists.proofprofile.net/proofs/artist/34c71c74-0fee-4e3f-afbd-c67dc17f39e6.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 0xc4f9a872dbeaabae000da58459e9fb9b6b7aa04f00ecef4d4dc69abfeb4e277d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEMM41201483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575001dd09b1a1da80621bd93251a05003bb5832f184031180e7e6bd200a1618. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DELG71400593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc315d7f09629a0c325fc8401e98ddfb100b0eb421a6189d7ce8cdf58ee1fa842. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/DELG71400596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3018c9ffcc5cf2a07e07cb0eef817a3cfe3f48f691d79d030dc20e22e50b496c. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-20T11:59:43Z), 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/DEMM41501448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e6dbd039878dfb81b408a002532d9240e42a194c9521a00fb72cb25da9f98c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEMM41501450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6faed8b21493798081b67bfb5e582955adf34f1a51e7d4dc9985bcf93d4a255. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DELG71400742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f3d4e571ff523a2a65370c5059ce3e6a43c7b5a903ea79001c367b86339f62. 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/DELG71400941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee89ed5d938eba21a98b81f4f48bd5e2286415bbf95df1a7eb78988f5d8c068b. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DELG71400944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76afac23f71b9887d9092fb591a853b6d1132ad0dadfecdd77b8d03abeb51334. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/DELG71400949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878d78bc388a62c32db3ef0e1bedd862e64fe5561a58ffb4642df6b6f894eab3. 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/DELG71400951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf997794e381588f33f448b00abd31db7bad1884b5dca53db93d0f3eb785bc1f7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:44:19Z), 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/DELG71400952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fccebdbf964c04aa98e79d9f8316ceaa2df16b265c3c8b347f3dfc67d94c82c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEMM42101345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e863a0cc5b6afa2b99de4d947f80fa41c811023b6225534a7edb4e6aa2b174. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:53:01Z), 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/NLM792300224.
Reminder - Answer Code Request [Bonus Track]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe505416b98e8aca14e88c61dfaea364a5d541286706e25d7e37cbe895aff8039. 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/DEOE81610322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe505416b98e8aca14e88c61dfaea364a5d541286706e25d7e37cbe895aff8039. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEOE81610322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0336bdda2ee43926945702431bb3e46f10120b6f0f962c6cdca3fdb416755c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UK6491400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c5334089e7431c0204edd27bc7d2bffc3464e7922d67e92e2b107039b34153. 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/DEU671704028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02708ca9ba0f37038d02590e933c1842c1eb2d117c4e8a3406f05122827e093. 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/DELG71400710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1ba18febf2a7a3f6b271625e1e91965ae2c99352cc81972a5fa06a64993194. 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/DELG71401195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435270d317247a239d3a6a884ada3d6bd42f8c635bd274af7013622057423fc1. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NLCK41069773.
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
Devil's Heaven - Answer Code Request Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf8d36d8b04e67c20cb5e17bb1536bc287d61f2a300f06b5eb88934149b55fc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKN6K2002250.