{{Infobox comics character | character_name = Kamandi | image = Kamandi.png | caption = Kamandi taken from the cover of Kamandi, The Last Boy on Earth #2 (December 1972), by Jack Kirby
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 0xeccbee90a1387ec7fab237253b578f065a217b9e933ed360a67385586c2eb4f5. 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/05d421f7-3f26-4b7d-b500-af22970705f6.json and https://artists.proofprofile.net/proofs/artist/05d421f7-3f26-4b7d-b500-af22970705f6.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 0x2fc7c4ffa26ce4e94d96f01861a210cdd4453009cf60b3f71f09f9c2c558ad34. 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/TCACH1587244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3985d443072b1a5a76386ac5212d5f1a66b1ab2cfbb4b63338ac4d7661dde3ab. 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/TCACH1587255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13063f697c2e2735a93ebcd745d684b70ec5f4d31053d2dead821ce333e838bf. 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/TCACH1587264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7443c7f1882a17220ba34c1888ad4e8d8572bb3b06e68437cef21cabb2d8dc7. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCACM1695734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffc24eae73a7cfbac2d19ee8f1b1a15ad1dab9c3a04dda6e5fe12df13cbb386. 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/TCACP1674933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a987c9ec877b80c58000173cc7a65e5303ea331cc27cb640bc12330940f67a. 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/TCACS1646699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a468a7efd8bdc73e98cbf6ec40048d9ddbd18db0caaa2bc9b524c21b2f8827. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCACS1661607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62569ad650f47b859b09f43ba721ee4637423a15bb3d5a6de798c6203d4d86a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCACS1661612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36539611c4bb912eaf386b8bb573e08a24984e0ac0476e204d8668bc54967434. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCACS1661616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fe7b3c70adbd8a6a0d80e85548075de6be9cdb18b955fbe1dc546c0171577c. 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/TCACS1661617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fc12d73ef8efd06061d23e5c7d5fedbc003020ff1d6ee2093a81a72400032d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCACX1738101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd311a11b0b56dd79f7cab5e9612b5ac42a3e7aa32476f5f84b96a380850fe140. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCACY1748951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc656f188c4e5d8da1a3ba9452fbbad7aa65292713f6049f610f7d4895e486483. 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/TCADA1787076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bbcc734d9f998a4ec813b0171cf1b1441728f9c99625ce49817241b4011583. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCADR1888065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf774694a4bf68c38563c0ff9435da733e35f468b193a195a0c9e83dddde9d0. 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/TCAEA1991784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5bb9be8b9e950d8a9e7fb3bee15c1b5b1a98abeeb65d545cd18ee4ea548836. 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/TCAEA1974306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5c7684ce5c68bc1bc8f6a14f36bc89cf7d5124d962b88baace28bc9e7e2430. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCADQ1828747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d95c6613c46e66f6a455d01c7b8a4ec4d26397cf65b1077589b7d18f89efd3. 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/QZES71972777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41df724e594dabf2f92af72e49c341e28dc023dcd2dafd7459600c9e7c2130a8. 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/QZES71992507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8cfd4c9f1cd21ec03383b32d0388f9185869577a3123a81939f0f98b8e7945. 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/QZES71972775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8dc2d34875e23ae036e733fd4b2be839762129bf7f56dd2546dc40eb84cf9c. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZES71992509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a629e09f843954b84c008d875feec320fa28d5e0157e560b26f888239ef64e. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCAEO1910430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a88ea5021d7079b337a22c64b8d415cd13cbaa9df180407822aa832bb78b71. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAFC2001953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4141f4a74bb8a7a636fe4bf6582dd68e27981ab52a0e476b5cbcf081e892e96. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/TCAFI2016344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96faaf21444be4300346c438e0a7d5d03bfe41ca3868e9347c68463a1f5f362a. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/TCAFS2112002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c73814bd34a0266dacc6f10327ee0b809c1d82cb4e1186504c679c275ad24e. 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/TCAFU2191954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a61c474e5840196ecd7ca4ffa6f74ddfd08d8bf2ea4b4943eabd316e59672de. 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/TCAFX2160763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac511eac258ea67813c03727df32fc0f71272127b95ba0940eb6bece3334d545. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/TCAGA2240600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5754fd9e00424f324e3159edaad3bfa2a30f9d7b08387cfc0a2ba04c911ca813. 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/TCACF1538923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154ba42f451914d9df08425c38e153dba549cf195969c6ecafd12eb00be63078. 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/USLD91723800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce466ce46e0c70c6166a81367bda6b085cd6f44bcba9cc50817b2fbff0d2af8b. 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/TCAED1954818.