thumb|175px|Juliusz Słowacki Kordian: First Part of a Trilogy: The Coronation Plot (), simply known as Kordian, is a drama written in 1833, and published in 1834, by Juliusz Słowacki, one of the "Thre
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 0x1bdb08f8da19d8ba32a68d65c78dc9dcbc3bb3a1fb9ade7a2d862ea0e95de6e0. 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/c617d234-492f-4680-9cc5-267a489b3951.json and https://artists.proofprofile.net/proofs/artist/c617d234-492f-4680-9cc5-267a489b3951.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 0xf5db73fab0337a5bcc3f4cf634fc4c05e0d83126f89f52f69fd2ff10323af934. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/PL44J2064706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e047cf50099ad1f5096b5163c9f31f43e352f4280768021dddaa310f58a20b. 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/PLC691800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7973c4b44d1e8cb9f6c43c81e734ec1dec642374a6312e7d4a3904d01303ee. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/PLC691700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac06b91f414a1911fdd0c26c9701beca34129cdc65a8ca7b3ec413e56952852. 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/PLC691800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c389a715efe60b522ea31b84c2ac1b5458eeb2dfed4a5a8f5709bcbba487a9c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PLC691800212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523d7548e7a7e9b22a593eb47ad3ea93423a706cd7c8e029df766203064ca6ac. 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/PLC691800213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbc78a0a2eac454921db16ab6693a5cb8751200891371110e8eb645c4be0d78. 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/PLC691800214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62088465551ac1c389af55de9e75e9245c92ba25c4fd6c2f972324829805c5a7. 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/PLC691800215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775747b1fcbaf67c53417aacab4867575d9ebf5f5fdf8efd6c3b07ee1fc11952. 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/PLC691800217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc4baf2bb300b067773e2c2f34476c95a011d8ebb8de2b2c777e960ff1ea11. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PL44J2064707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ca3595ed865e8588d8b913d1b0c26df41c5ce94d0ac96cdf6167e336108717. 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/PL44J2064712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fab00a7990901010e8517ff3e35e1c5485581d022501a4f57d2ee7aae30eaa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PL44J2065210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf697f697c369b9954fedb75d8ad19c3795bb73b46a1f7367cb37021545acb2c6. 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/PL44J2065143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd9afef20dafe52088440aad8efcc11c887eee210d6820056fbda165ba4bcba. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/PL44J2065212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6a17f14ad4493407d27d38bd3b3eeb6f00f577150c4479e991f6c5cc5346c2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/PL44J2065213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b6b196013fc3d0ca13aaa4c211729683132699c728cf4cc36f04d87b6fda1c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PL44J2064771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7dd9f10e1490db5662d4c999accce65afdd6c254a6d569fe72ec03518f9f20. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLH492151378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9b5cfba72591e9a32c2db81622c4a74b5ded2d233524c2ce10d1379fbfde1a. 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/PLH492152899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114cc6ad502bba461eb6551b1ab9a862a2dad8bdb7c735158a09740255f0c40d. 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/PLH492153566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e428f23c74553483728445c7decc5f775a47e2cb3c82deeb7bba956f4c83098. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/PL06V2269700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c44c5865b9f34cf1186f2f633db254cde416e1d6d733eb914cc8143cdf43da. 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/PL71Z2389071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa934258f8861706b849ef54083a9d9b86d5ac5179f5473627f9b4868f3883f29. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/PL2C12370322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d43ec5db212322d8daad8bd4c4de84193417be4d88b21568e1d599f7abab7f8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/PL2C12370321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27174854dd305b4e029c7471ba623d61f08ed05b278dbf8c29e9ae31fb0bda8d. 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/PL44J2499856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5b42cbd7fcab40f8882268bde7ae85e6f6e650918163b11faba2e33a284d39. 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/PL06V2477894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67cc82b24bd8e873f38ee81ef297085c0fa6ca580e340a6b4ac3baca06605de. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PL71Z2445574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2c9333c40bd5e465c21d91c75672f8c99acfd2246b63d3d9b878a191bf3d24. 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/PL0B62455997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1794cd2f03045dcf5f6e2ba19972b7213a2985ccff5bed49749fef54c1023a1a. 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/PL6B02404205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5f7892a17fa91d141c4b53c33ba3e50d2a0650ea0cd0b8ee249a1e20080c8b. 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/PL44J2518263.