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 0x99359a2f1d1790e3d1f91d830a7e096edb0b2b4b34f7c84c690403c61d43aaa0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1dce2ff6-67d5-47d2-acbc-d379921a4ac3.json and https://artists.proofprofile.net/proofs/artist/1dce2ff6-67d5-47d2-acbc-d379921a4ac3.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 0xc1ebf694b36f215b24c99b12e688a8b8c0e82d9450eae576f0b7b23d7424f58a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:26:11Z), 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/PLL621400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7510cafb8731510a7c4e76164f4c049b1519474183b03aef63ee5cc7b68816e0. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/PLL621400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e8bf193869d4c153dd800c223c80cb4548587e936f9f58664955df9bc4b67. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PLL621400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51fe9426f6a545765cb947299dd6b75b83296a13bd8d898a0c2dbff16a67e01. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/PLL621400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0370c703942ada00c67cb271e2eaff68fb0cd77a2d94f3e0eb636bc3e7b49a3e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLL621400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c1b7486981d84f632250f6dfda8645252dcd6b563e0632fd769f453456c1e4. 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/PLL621500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d0bf53ec859c237b116a18e7988137fba013aa848c91e6b2d9695c115ad88c. 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/PLL621500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882ab66eeda081b4d095fb6f53ae3218e479f7e895bcdbb17023f1723c58ca7d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLO531500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7720d04fc2bad3468f911414c13a6c60c030e11b6b958116b80137adae2d5ec0. 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/PLO531500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a0ece58e6f904358171a38b285e6f4cedce1b41b8c3a846cdd728d0aa86281. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/PLO531500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195793a6be036fb8781cfb4923b3815b1a2689c2f0ee86df841cbcc8cab4e896. 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/PLO531500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b244958f8bbf0d083e8f065a06c56beae8fd074ebb042b1202907ad073b8a1b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:51Z), 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/PLO531600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daaeea291eb3145bb6fafc34d51d1ff1deea694bee8d8fcd584e4a3aa7b1396. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLO531600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9197877823b2800c5a75640c6ea867e45d6fcc82b42f11ceaeff2afff2f84e59. 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/PLO531600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98598dd4ae124dea191c1aa6451089a28ae9dffde4eefb3d3fb670fe2bff7c17. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PLO531700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53c081d4fa229d750693c9b22d462113c9a35188749b669e60197544e6c98b5. 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/PLO531700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae57878e63944cfc1b4dd3928350185a41ac9ca998f37cc926286a2b4448eb47. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLO532100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fa324abf0c9c77b6a43f83729b18cdcb7a88ce12c77cb457acb5124b413126. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:54Z), 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/PLO532200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a794858c5217b98fb54ffc3cac3914208aa840f78e79ec63ddd4474666b005. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/PLO532300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0de9c71f0aa0d7235406c59fdd7ad2f2e32eed4b8adde33a8ca3bfd6d6da9b3. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/PLO532500004.