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 0x4e6967ad4933e7ec4342a0fe89d1f92eae794ff8788ac33db1ae8b96b6ff796b. 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/7666c499-fadd-4800-9b6c-502e1b6a0fe9.json and https://artists.proofprofile.net/proofs/artist/7666c499-fadd-4800-9b6c-502e1b6a0fe9.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 0x8e46f618a9ca995e1e1b1b624cb393fdc7e85b4f0505884a37dd4b8e3d41baf9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2448886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cce71892da0bfb2b51d50c03772497ca9dea500befbd8addb0e55b2a262b63d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNB2472010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ef1f90baed4936f4e9bc98ef47f2f717dc8abfccd74f89f081adc6dce1422b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM42K2431020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0be87f776deb1096a882c7779a211823d3367adb47678e1834cd5db548bd721. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ62436155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1472aff084620bc82c507a545ba5f82734897d50bd84d218bae1b5e0bb421521. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ62436156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d7978ae082ef2d72f6c0dcf62c08f948c694e60869c7afb41ee01767f40a82. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:03:52Z), 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/QZFZ62436154.
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 0xc2f4bd7c598f6e45f836e03e98cf1a79ae37e0f3e5c4049119e652f83d1b6cbe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA42434843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9547d94bb5a98a5530a22b03b740ee49b3772e3d8d65dc5056853d186fc067. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZWFN2303343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85ced1875386dac27a0ea7c07502525ddb870986bf6419340cb4ada7ca0af54. 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/QZWFQ2399826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7963507d2732427581a0625df264ec6ee1ca250792929f51618150b6c9fe5d3. 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/QZWFH2329288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d9d2fddf4341748fc65436b8769e13c5d5373d8a114cc90a5a88ef1e188574. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB62302386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b885a836fc607478d0a4c54cf460c577e3dd0332248341159372b7929aeac60. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWY2389335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf983ea33318513fc495823f3c1ca5fe29db71b29f379ef29fbdb95bf26cb4f35. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6G2306913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2a7c6d3fdd7ef19f9830e0fb5805524212bda2de1135159832f1e424d58688. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN52376954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a651907147425be89fe5b81127a0939af6200411570023f0231f2a56b0821f. 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/QZFZ32320667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236d1994cae797f8f0189beea644e81d7b0a2994795b51def96863d87613e5be. 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/QZTB52280034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3125a3949c8d178ba3f890b334618eb13a2ff4bc7399ce83be0b94eb60001385. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAU2234871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800a7a161869c8c831641d3aad1da577adb39b9d3e417c0a0b8c1938e9c8cd6c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEM2264669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928daf5a1ddf3c1f7e50fa3813b1e88adf817452ebac477a7aa1214d6db91061. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHNB2247714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc008105603968cb7d66a8dec0fea4f76f351c4af2fb500133267ec9f6159ff54. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFP51974872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2fb1c3821685dbacd990d0c36568ceb3c7de1659e99d81e56150f9ce97bdc4. 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/QZFP51974882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7f6657c9074b5022ebe73099829ca598b1296d1afd1f44aed81f223538e2f1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFP51974910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7cd7189937d6f21c82f987ba068d1e7c145e8bd56e2b7d4b6d5895f5230af7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFP51974914.