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 0xbfb4cf3cb539cb5b9c7a2ca48c30ee9a1218cfe7f7a3c0a31dfbe8887fa95cc1. 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/3c45caac-7b7b-4718-a6c4-4402fb8dcd2a.json and https://artists.proofprofile.net/proofs/artist/3c45caac-7b7b-4718-a6c4-4402fb8dcd2a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Repetitions (Letters to Krzysztof Komeda)
Knowledge (Introdukcja do Etiudy Baletowej)
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 0xc38e7ceccd92065daf781f2eadffa779de011f492e58401d508594b885a27db5. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/PLU241700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe218a3be24a7c9b472bb6e0812a81d880ad4592776ac9965f55d914aa4dbb8f1. 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/PLU241700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974434eeb4b5689a9d600f3b4177a3a9b3f612bb50b7e3d962defa9dcd083823. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/PLU241700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a76b3fdd89f4fed71d7730ebdb8a3c6d84e1375a06cb7f117d966ce90fba6a6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/PLU241700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e434f62b63ea38eda0e5daed3163d3ea76b1515a5fc38db24f4d19eca6336c. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/PLU241700006.
Waltzing Beyond (The Song on the Day the World Ends)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f78473c264e2108064310c1005a623b42f1a6555856667bd444b7fb5820342. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/PLU241700009.
Repetitions (Letters to Krzysztof Komeda) [Live at Jazz Club Hipnoza, Katowice]
Repetitions (Letters to Krzysztof Komeda) (Live at Jazz Club Hipnoza, Katowice)
The Lady with the Golden Stockings (The Golden Lady)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a78aff5c6f4fd964c4b2d3f4ebe635caea03cadd3c9dbaa39436b97e3933761. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/PLU242000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9440e78d3f08e775dd4ef4ce6057f3e2e78c6f98ccd340d277e93fd956b22552. 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/PLU242000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8952d5fa517624daabba048d52edd210e568438040df0b5f7614f220d540ef. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/PLU242200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2791a1e551503644093a607dd3b625cf5e99fb0a9dece2aeafa3c15e1d0dd300. 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/PLU242200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcb08bafd8db8c42c9253e123af222b8d10cc8c87b5cecfc1e93430825a14cf. 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/PLU242200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2b4e1ec72dfe19728e50b96f09b41936256de47b205d08f9e1f43a87d6eb01. 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/PLU242200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99471c57e6b4bbfd9c5a9938421f86cbd71ef0f538bdea2696a02ee1d1b557a9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLU242200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571f8a8a78737b100e6073269ac7e24fbd3ee9a2b11989c4c34f25c165e8ccb4. 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/PLU242200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2cec3d3efe0c2597eb08e1919d13ac797d56f01431d27cdb17705541675b56. 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/PLU242200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956fa06f7e32e8ac239d47823be6892bcf2e2ce9e439b0bb84dd5556a0915515. 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/PLU242300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ddf9806e5087f7806a2663a24ddb0ce195cbdba64cd69815ca6145a6e8175e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/PLU242300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250f4e6c9fe9a5358410a9d740892cf1ec5c6526210267d8f4a4cb4d9075978f. 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/PLU242300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759de1896d70ffda3bdbc870af47c6a3b7abc7081c1364f49632621777027fb4. 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/PLU242300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e2489479ec67c32a6b5acc6f3a399662272b14101744430d59effa573b0ad9. 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/PLU242300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc53d8c2c1d45e2bb369ea8cacffad6cbeb6c2d45ccd28e0eb6b70cf4f6c9388. 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/PLU242300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432f57e0341fb975a6584ffe2d9708a0c67d88331d797d4f456cf06fbbd7bb97. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/PLU242300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82890a9ab46263010c050f796a4b63099258192b90c0440710627e86e2f80267. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/PLU242300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e775013535e1873958e3355eecf4eff237e142a05ff4b826f9c4b1000425e5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/PLU242300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657cb1a793ce87c4cc17c4d722b6280fd0dcfd05bdb56b055a234991e0811648. 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/PLU242400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ca15d04b946e86b38390a80f55aeed77ca819cd0f3680c4034d51fa4ee66fa. 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/PLU242400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b1869b6fbfa28d0ad7ceded7427ca460c93d9147087508a915a57eb5af9f42. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/PLU242400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890df39134a9f0f101a30cfee92d51f2d196d3bb9ca4d4346afa1381770463c1. 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/PLU242400017.
Free Witch and No Bra Queen / Sult - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bdd048a4b678d4f6cbd5a323c6881985a82c823ad5b03480c76fa23caea885. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PLA391820415.