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 0xddb13c159d4e7e46c65cb385e5d4a5fb9774baae590b60b8f0252dcc367840eb. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e667575-b446-4fb9-b5de-11b734abbdad.json and https://artists.proofprofile.net/proofs/artist/3e667575-b446-4fb9-b5de-11b734abbdad.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 0x499c08937d6ed89fe34519cf0997fd73f8647c42fab3f78c29fe4842be918a80. 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/GXF9Q2504688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa526410d246867dd5b0096be5a7362c9ac17e1612470200cf52e0e977be8eb5d. 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/GXF9Q2504690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b88921f0ef9c199a5783405c46c8a0e49cbedce7cc9f873ced3a89b89476a3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXF9Q2504691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cc7087ab32b35dafe2ee253f29f0429e9330c586f3a3c5edac9d0120be427b. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GXF9Q2511278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0971ddab10f2dea9b68a163fc1a92a289a8fb2fc25f1d2abc145cb898abfeb. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GXF9Q2511279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ffdfc07b600b7478a54407cc9071c9b12ce796cbc9f00b3de2ef4a073b482c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GXF9Q2511280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5207faf8499651aab0177a9e9f90e6ce683c81e833ff291e6a89f860775dba92. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXF9Q2511281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1d4692eefd0cd008cb4ff5a46d11a622b38d3f54b67054b2f1b8d4fe3da13d. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GXF9Q2511282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9fdfbaab797e7efea0bcdcd1390a3c99897729e6a4dda7fd2f28e55d1161f4. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GXF9Q2511283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221b911ca7db58d0bff1386e7021bd9717209c666efd9c5da68b3244e059c975. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GXF9Q2511284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a314d781539abf298140c27df65f797846a764cd65764441bf95935dd0daae9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GXF9Q2585040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59acae2a58edbce1b542ae2617489149912f83a86dcb6317adf50cdefd9d3328. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GXF9Q2585041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ce79f0f0f501284dae32825158988f0dd63517629e27f066306f5c6dcc907a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GXF9Q2585042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2feb122882e2b8cbe1e81df55682421be060a6ba4c2f31a6f5322dfa21995de. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GXF9Q2585044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd342eceeffac488b852debb3c47f62e2d855e2c85f0ba7e4d68ca901cdab055. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GXF9Q2585045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95743af221600747ba40a76b2f5d54b23561c2a2899fe2f6c262757ed469ca5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GXF9Q2585046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5062e622a97be42fffe34edd0d7963d0e7ba9eda8b01074df96a53cb9b170f45. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKXN22516796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab4b1f43ce95a55ff9055b608845928a85089dbb027abcbd2f70a739a59185c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UKXN22516797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd543ae71bb8bd628a0360ce55e7a09673bd94b02410c7b400e679d5bb625898f. 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/UKXN22516798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e3c4b6c029007efd5f797d62b61ae0a46c41b7e0134dc8bcc5b63fb04027fb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UKXN22516799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291c0dd85be9de3bb0b0f4d4db21b5846ebc7ae988b2742c80bbfb6b33ecacd8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UKXN22516800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4005ced33bdbb443f9afb25e3dfd8b01ae89c4cfcd4d5b63f64e7f6f5020eb10. 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/UKXN22516801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe506d22657e62f4134f7f726a182b123c9292c33eab1f47143e55421ceae0ff5. 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/UKXN22516802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04f0618fab7e10e162e1bbf4da0ae83664a97c6c6b5d2620656979e2118044b. 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/UKXN22516803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61bddd30e2c36582e8d38662df0a8a43e8bb6b10c80a18264b5514e266fc9af. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKXN22516804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c39062ed69668c76ed247e521a93b2ab6fc5d57edf78ae3e022abbe5968b469. 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/UKXN22516805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9f5aea6ed7bec0f4677a787a318ca319a2da95c0ff0492809ae40bb2abae8a. 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/UKXN22516806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ef5d77d1c4bf7eef226cac07f37a684db60d75a99b7d5a7c57505295a72c89. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UKXN22516807.