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 0x97c7ae800622142a4d35ec0c0d8e62838170e9084aee77b05fc6c4a212fed664. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/913bbb4d-5236-4504-88d2-1c70b5b88b95.json and https://artists.proofprofile.net/proofs/artist/913bbb4d-5236-4504-88d2-1c70b5b88b95.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 0x58710ca1c0c6d924c8715686e9cc7dadbd7d62f9648de048dc947fcd72fe5447. Chain 2 (Bitcoin): anchored in block 957842 (2026-07-13T10:08:30Z), 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/QZLHD2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92e3c3a34d6fa7dcb7eedb58e446055d662f7a8554c04bf5fbf3df489d98b76. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZLHD2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c61cf5a3d110c4979772a2e7f328b3765bed18fb4effb2229d5d1f9dacce9a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZLHD2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ae7d1e60d088fb210d3c9cd6ff6cbf3ccf3799cfd3f4db7fe1c440614bcd8a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZLHD2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e7bd65d7311688d531fc342f296136d826590b8dbffb406a84c283c98d7038. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZLHD2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1389d36091c52db18626ca01ae2d2155747a7aa8d56b07c06c7cbc61bb805a73. 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/QZLHD2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f73a3f209ea31572dbcebae9c63b92d15e0fd555d5a0e810c30c13060f94670. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZLHD2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcce0dfe5d41ff60af075fd8e9d0d350821f5ac6464fa7dd12dd05ebb32f1d0. 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/QZLHD2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a72beaa1e165b2d14e359ab355e94c6672d1353aa1ff2277041c26de85f9d5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZLHD2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ab18e046893eeb2211762f67eb7ed6f5259760bbc4a93577442dfb6b2e2318. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZLHD2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7548c3a0060f2d29f591489665f9c87c07683ed8397a959118b6f9cac071f378. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZLHD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d486efde631d4f2d7d1680611def8f5ebaebfc8714cf4eb0a7508090c1469b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZLHD2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92ced499a2c5b2f50fdd15fb1b38c8c9d1f32a73ced4ea0633d2d712f6ad67c. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZLHD2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fc70568f9e4c763d5341286f5e606fcfbb1d6cf502e6884f18fa8abe609457. Chain 2 (Bitcoin): anchored in block 957842 (2026-07-13T10:08:30Z), 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/QZLHD2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359c35fbea9af798f968b424a8cdd84e4b540167132a0001231d32b2693cfd57. 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/QZLHD2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b5b6e63ed26d7ea328e1247bc8a16e42e86b6ba09521dc8eac17267d8e4a5b. 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/QZLHD2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4d69a4090467a4b47475dd587708ca8447b683f4d921e9850cd766739c765b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZLHD2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c69e60f424bf5736fce3c91d0649e6b832242ab445b1a2431d2b3b407aceeb3. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZLHD2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be1e29850e7186fe554488798703b99241a436650729f703d557170e462f0a2. 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/QZLHD2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b816241a0bb7f4998e614d834503100a7de3485c4b78044843a8fbbd5d3399e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZLHD2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139af0b9f4cab6f2cfec91202696f551cc81c2ebe1db2f9f404d7af5f2c39517. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZLHD2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43828e9077c7275a68e870720309a657a2b00cbe4b1fdeb850f8f0ac114afd61. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZLHD2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa59d428f53da1f2a05ae50beb649e8576542ab4ac108b7974624b70d9fb783. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZLHD2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5dc9c1b3e3a4ecdaa3ac3488914daa550fa171edb41628456637dd57be4847. Chain 2 (Bitcoin): anchored in block 957842 (2026-07-13T10:08:30Z), 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/QZLHD2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291abf28c9ca3e679a80b8bb0d67302236ac8570eb9f36207981d666d10cd10f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT3FH2596011.