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 0x8ff2444bf542b60fbd4baf5763d37e626a87ce1b84db9e92541ee542ccce804e. 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/61d773f0-8ff9-4cc8-b97f-5e149334f1f4.json and https://artists.proofprofile.net/proofs/artist/61d773f0-8ff9-4cc8-b97f-5e149334f1f4.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 0xc03819870598c6ab1a4d3c5fb5c2f0c14361981ab38eca28b7fc6f71980c6c77. 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/QZES52194236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85240ac6c5604da8f33423fe041b5f3a4553b1e979f9903a5b5f0dea235eded. 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/QZHN62168889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f28eb79eba9f732e1374857423f139cb4087faa094fb5a3168a7541490a2b10. 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/QZK6Q2153372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce6ffef104f30fb011b2c56c4d61c67826cfc108bc730f6fc422a058338da37. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZMEP2175250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf441e3622c760dc984bf891ecd3a303dc1e2a57a24e790f7ceb4f5b0ce8148e. 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/QZNWS2153048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6042a87cee121794072bd09cbc57a9ff3793ac56071c45528114419b0719537. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZRP52138618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8695387d67b020fa3167fa94282b8e6c0f776780a365b51ee0b65631a92b35db. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZFZ72278112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48ca2093949e35825441cbac5142b9a1e22e85b84f04579811150c471b7dd4b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZDA52225019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9344cfd2eea7a8d3ad5bb22da9cb0d55d45f6eff43e9c99e3048c326cb561717. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZDA62223161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b9e14fa9a84aa81a95d295f2d04e11fb7824915b836bb46ffb1ca18002e59d. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZDA62292401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9043a667a8cf2482b35cb5d90e02150291a7305c891bf999efbafc4d3f5a5a9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZES72263886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6f60f9299c4ea6616c0f1a0bbc6e9b71b10bd1ceec9e825f846b34f1d44b72. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZES92218995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8c5f1144373f4d01358238a32a5ab19c96918910581429f2f76086e37661ba. 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/QZK6J2237527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d28319295a490ddcb89a34cfa1562f705d09caf51044de3e603fb2907510f96. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZK6J2235167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8bddc8a4fefa1257309806baca8a58e65c9d58cda2629c831164c9589d1c87. 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/QZTB42298304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e47c4105dd35a379c59888e18a732e30986119610ec286d0e12f0458f522150. 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/QZTB42231434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4207f8414e265228d46cc37187ed01ea4c35827975c4cc64fab18b01b6da09b5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB92263709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3122fecae5489bc7db29c8da3f6a8bb827551ef9bfe0fbb76589ce6b1687bd. 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/QZMEM2393205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598a8cb259983a45a2423362b1d083cfca08500bc5e38b5222fc876721c2f252. 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/QZTAT2329574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f75918a2947e2a95d5d3b2b135e22d6c8b9f034afa88ddf9e6e43467fd8ee5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBB2358871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d91081d716c0fdc3db5a8336e7a1513de7a46d8ab152fe20af77b0c0c7dc977. 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/QZWFQ2327556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bab8cc500a4bf424260cbe0f3335ece537136b61cae7919e6d4003fb21bfa2. 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/PLI368391040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3425c8c733d2965ceb5092de5f5e6a1c848bbf1db8181a9018181f52062af63. 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/PLI367997570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cdef70334c9d74f6ddeaa39bc62f8d78a66dc4587e769c14641ef125408e00. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/PLC062232581.