The bathyscaphe Archimède is a deep diving research submersible of the French Navy. It used of hexane as the gasoline buoyancy of its float. It was designed by Pierre Willm and Georges Houot. In 1964
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5df40ed8a44e42bb4fec874d1069f824444d82ffbf11e964426ed72de59384. 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/a9c5fa8e-d0b0-4927-b60e-0c4d3f699cc1.json and https://artists.proofprofile.net/proofs/artist/a9c5fa8e-d0b0-4927-b60e-0c4d3f699cc1.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2666d6dd22b1664755eb31f321b8392e2e84bf98116fe4ded563d6efac5c117. 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/FRZ080900294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b302fe8000bc0bcdad5ef187b39b25f73dbf25eecdf437f091bbf470e1155d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FRZ080900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe528dce296b41af806555f6e8dfa25a11f41bf4786cfc9b8eb5eb726be7becbc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRZ080900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57ad14f4d5424b6a0f7bbca8fe7a3cf79e95ddc2568a579cfb51195dac4a537. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/FRZ081100163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482dab996b89ec3ba3d17d120f4cace70d149d30238a0d139a73a1ba24a56129. 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/FRZ081100164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeaa995f43e03aeef6ab9db1d0608b236dc8b3c21e7bc90e2a6ca4aad9b3742. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRZ081100165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97f04c5eaa11404a2f711db43a10d7f016b368690f78a4e461ca66ca15f4603. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/FRZ081100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363fc9decc53bb681cd610ead73b39fa0672fdf4805cc954fccaa3330983e33a. 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/FRZ081300472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a55e1e3778f2b2df551c85cdecf5c09681e508e1e2fffe4a23ddf503599bfa. 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/FRZ081300473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74358f6f571a0cb00ff44b099b7915768f37172b16074bfb2e18b77fd0c423bd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRZ081300475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b3b7621a5bade32337bf53dfb5bbbd19947fb9c77f16980630d536b2854f3e. 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/FRZ081300477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6398b7259a238b47abd2ebcdcae8d50284a565ba93a02a4aeb08e4b24b3a6839. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W11701218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbfa7c19320daee75cb20f4919ca691342d85fa35ed8cef74fd97545ed08a7a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR9W11701221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2505df30e7ccc997adfb53f79fbc7121ffaa6d8433e8b1ca0d15a7fbf4b7ae5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR9W11701227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ce03b049b983c9dbe684340e9209baacc31ff2ac1ff2551de2ba367bf08a78. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR9W11913562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb9a7f00e7a5812eb500adbecb31d8abf1a5138ac59f858cc39e2f5aed21522. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/FR9W12304003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b746e8e07e7dd2c54eb6e7c21957d1f21ae08344ba739867969dbc0b7703d98. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/FR9W12304004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf555c6817fa247aee8edec015a9454ff32d0ba02dfe103abc8ac6e4457ed44e. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/FR9W12304005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988cc3e9356f011b042ad76ebc02df916ccb52e0ae55b337f34f80e5848598da. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/FR9W12304010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f66d01fc9b84b0d714f36150eb8bc4e77b4136a4db311b7c5eefb364c4156e0. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/FR9W12304012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a2750cfb10fd67a301f77cb34a31756ddea9668ae97bb86c16e9598dd5e147. 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/FRZ081300216.