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 0xe4f6ab40249c177487fb5d626efd9d6a8054a6e1039fa2977de49d9c3d6c62dc. 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/70056f45-c113-4111-a672-a2de995d287f.json and https://artists.proofprofile.net/proofs/artist/70056f45-c113-4111-a672-a2de995d287f.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 0x681cb81eb208010fcd951ee9b9bebd52954852d28615069b2edfa58c55198d75. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2P1509746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28e9a9318a5d445dbd90248f055a40347de7cbc032ec9a20e45183db16cb9d8. 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/USA2P1509747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e04392c5487c253e31a7511df2bc052060665b93191c895ab6e6b97ff7ee64. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:49:43Z), 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/USA2P1509748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3f1c2d18d5f83742d0c8561659ad99cdf6c7f5816be26fe594a10c9d21bb6c. 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/USA2P1509750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1db0ffc19bf581c16f240e5405afc9f89544894081ac26de8fadcd404fda6d. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USA2P1698640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cb6d33e797cd7721e5ce0016b579bf393e7625b4827f26d36978e2dffde01a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA2P1698641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae586825a13cbe80c52f6ec0b9223fcd764f4fa5f51769295ed28f18ea24929. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2P1698648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffdd1a0def98d4dd3417066849776032afe590c66ad7f7f7aae4f106a04fa5e. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZ8251710024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72e0fb4af9d805debad4a156c23ad9ca47fcc08c7eb3b7412e032b53fbf1e6f. 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/QZ8251710025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc760e8bbf8b46f2895f6c20b222fdc33bfd5492b7df065feb786b454289cbe. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZ8251938215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15405d8785afc1d75fc85ce0d4d79abb322f304b8c5e0b614c7fe70952c9f034. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZ8251938221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e57a2cd1f2b62afafdea9fe09927edd06de462c69264336f5ce2abda804ea9. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZ8252216656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115406ce0397798e5008b42c9a0dd9bb47ab41ea29199d6284b404f958afbf9e. 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/TCAGX2313659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97ecb733301fba77f641d2cfd724237ad872835ed6cc64d8d0a720fb41315a9. 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/TCAGX2313672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c1ad952cee6e0d5bc67677021bb00cfbebbdceaedc639265c884f848ffd9b3. 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/TCAGX2313677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea29d74e48f086a890b30a3d34010d39dac2522cc7787996887c6a7ba48ade4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAGX2313702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed055a103e1cbc2f4d4043c5b2934156873cbe2c23704bd9fb5051173749ba97. 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/QZWFE2338223.