Ico (stylized in all caps) is a 2001 action-adventure video game developed and published by Sony Computer Entertainment for the PlayStation 2. It was designed and directed by Fumito Ueda, who wanted t
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 0x37d0161fcff350c51fb04d09e60830c1b69cbbc83a584fa0b2138e7777874825. 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/9b0b3855-6f33-41b9-9dfd-2eb600edfa7b.json and https://artists.proofprofile.net/proofs/artist/9b0b3855-6f33-41b9-9dfd-2eb600edfa7b.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 0xd7ef3eb05bdeb9c82060cef0670259537f8103f755f437253ee6b46d21aa90b6. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CH6541750884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61017f1c0da75f3f237b14e07d8a05b5266e6e8a2e7d15566a41e6ec3a2a366b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CH6541750888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceed3db5e94005fde109c1b5d15daf6cfdfd0a9716d3aaa6b80c6b8d7838f46a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH6541750891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9077a8876925194ad161c19a5952996595ea2b958caaf556dcd7e7d2d91f14. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH6541750896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e4f0c17bacf47b7006795203b477b3d744287b2735dc9532a1391566b5fa2f. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCADO1898319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52d57355c0395bae091ed3dda3c0b178279fbd4096f01cf5b63543d39f1ef8f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:50:58Z), 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/TCADP1899350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09e608c2f0a2bdd402809d9c55f55942860c4b4a2fe409e9e566669e87b3a7c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADR1825005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be652f92c53dc0faec2a8355db9f3177581f03ff0477988cdacfa6a4f724a01. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCADU1847369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1a9b90f00abb9dddb175f5848a5b79add6072f2182fa253456cf582a42bb1b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6541871507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc394b2cedc1f286010eb1a11318ff18018b2e58657e4aec9a751edab78df65. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:44:45Z), 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/CH6541871508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d9d4f14a4dbb7506c3e8b2abd0af63e5edb8353dc0cb2284dbb027fe3ac570. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6541871516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b84a85e004d5a503bcfc048104f12d8c32f8f8c425e2261b1bc217b42b60b9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX201852618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0337175a85b9aa95736508f0c5c950c15e809c2594906cd250bded9d24e01e80. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR10S1922049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaebd01aa9ea57826df386a93da73ab66ecd1be8d28f8dce71c46b17f13a3ab4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:30:44Z), 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/FR59R1945088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460d602668358ea356c5ce4a69901767bfcf42331b7675b430252c7d8ca0f90b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR96X1947195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904f5208607355c38d1d8d858c29ad9c4360cc0c630518503631a7e58db436be. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:32Z), 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/FR96X1974991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b63a78e5d247846c850b170068a0cbb314e0bfb00ae74bb7b258b62cef6c792. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT4K42521261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ca39d4d807091dd22c6a14985f6c3ded1989e359a92a4af30e686f9294b7f9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT4K42521280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2d52805cf2757bb54cb09d292ff8df945cdb76031512bcda8ff8f0221bb69d. 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/QT4K42521281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd197118aeb0a12455f75f7b063217f2c622c740884d56c8d48f359e4225c07. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:37:52Z), 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/QT4K42521283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03bc35a9dcff3f1841a3b743210862a6cf90491963b8afc88433e5c21507c03. 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/QT4K42521287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33af529d5c6383882f21dd0fda6d217a74cc5672b4cd634704f8d341b08ec54b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX201916182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5534c090171661ae9b89925c4281192e6e010fcf79be74d19316d41c2a83def. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:39:35Z), 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/FRX872244866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6265cb8b1620aa297bf9bc6d4bb7c423da05e2ca495d03fd85a807130cef0bf. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRX872244864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5534c090171661ae9b89925c4281192e6e010fcf79be74d19316d41c2a83def. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FRX872244866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70847af9adf2ae0f06370576df9e592574dc5baf946f181152b37742964e72b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FRX872244869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb514eaa0981ec413a50cac4b29c6db577fe27a5a01d9484973ecd84b1ef1dc96. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/FRX872244872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08129a390afbd1597f364350429a9cf735a348613c258e519f2daf69b5d33a4c. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/DGA072347002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a28911191cbffb23dbf4f916549724bca395709c652a2f91304ef598a10a96a. 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/TCAHW2488814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355f421f82f5c79469bc66ae66a291080b599aae32109c27b7125d0693b54a05. 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/BEIF52100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465dae9acfeea279915ac04d43eb61832d9d1a551b6c5ab3a254869bca960b97. 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/BEEO72000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355f421f82f5c79469bc66ae66a291080b599aae32109c27b7125d0693b54a05. 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/BEIF52100025.