Rabo Karabekian is a fictional character and the narrator and protagonist of the 1987 novel Bluebeard by American author Kurt Vonnegut. Karabekian is an abstract expressionist artist who appears first
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 0xd280b958d0aaa440e7e6b05b6a97d818e16954ef490fe7d4f6717b18fff26905. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29ffa178-4b59-49cb-a4af-f25f7f6cfc01.json and https://artists.proofprofile.net/proofs/artist/29ffa178-4b59-49cb-a4af-f25f7f6cfc01.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 0xdeca07382745bd6519369829483aa6320cf3800205c23bf3792e390bab9b45b8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJL2578863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaa4b4e7de687a6c6ee74d36e88776bbcb54b686e47f85ec2c163c1fa8b6ec7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAJL2578891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffce594e7630756bff3aa2812fa96b14505c6af33c0bfcf0443194b5a59a846a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJL2578849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2706c5768e95fc931d81a65e16b7006cdef1fa964364f6730942bf1d50dbe61. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJL2578825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b00244acaf10d424e9f7df2865a5178530c224f20fc22e317842430b9eca5f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:51:12Z), 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/TCAJL2578808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc3b4587d773704dc733424670a9e6b18fb4fa33738a7ffe3ae20eb782b5146. 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/TCAJL2578789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a293aeacd8686f6635fa83a1d3149201660af1913ad97e9d79e3b00ee1ca39c. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/TCAJL2578777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddfb43b8fb0f62d6dc89d7da957bfd11a5312ba5a00186e4b2acc01812fcecc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJL2578755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fbae834ece2656d21c969198e517c615cdabcec4e110b8e0429c563fc725d3. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/USDY42299499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d78a837bf6214619c67a3a7470594181733725b4189ecdb345dcc8575f0248. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJL2578743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e8840c19280d33e4dc7229cb3daa9a1a42a8ca9c948f4f756d9fa46a4840cc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4R2382465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e1807333a83d892a884faccc077bf1a07d171dd40771b08711b0dfb2ea0149. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJL2578737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dee234294267498ee01e53f2a0969069f429162a2950f77f193f6b910d4224. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USX9P2323173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c92bb0f775bcfed2351cbd8522ddf1b8eeed80bed499113e45c568eaa2d5e93. 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/TCAJL2578729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e17bcdbda3c82c8741232d3a33ad95ee8b68cfc25ad6a9e5aa46b71d9c20a7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USX9P2348291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0d1d820c29805969586430cfd2e987e2ce972b2e49c210a5f71babeba54fce. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJL2578712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6f43fb3d2d21e25fca5e4aae0c3cd1393032e7a56ad5daee2b1be221f9a9dc. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/TCAJL2578697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6793ba5b96b53760450f0108c3f80ffcdf4437c9e06fb73e1927021a5bddc1e9. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/USHM82409032.