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 0xd8a4bf3da12762e453d46e3ece5bd9f279f128c037a767ff8560e4302602f520. 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/9ae3a989-336c-4fb3-95b5-95c558dc49b6.json and https://artists.proofprofile.net/proofs/artist/9ae3a989-336c-4fb3-95b5-95c558dc49b6.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 0xf3d61428f784dfe91b73cfb2217c9a52e00a667c754f9c661a4f6eb5ccf58277. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:36:33Z), 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/MXF390804694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac80bf40e74de1f1ba47364f68e5f5ec26769696673962830ab1d2c723d4cbc3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/MXF390804697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d88db581a0e43694351f67522617e57f68d925f77057623067f2ce55a3cd95. 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/QZDFP1932278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f33c71ba42829b8b345fa68e7369efa48cf8b8f03179db8a91d73772a7019c8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:35:11Z), 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/QZDFP1932281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e8fd1af7daf253cfe1f1e9af86308dd32062a6702fa45ef16d655d8fd20c56. 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/QZDFP1932283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61aa1bcb4a78024b01e980a9639f66ba274f6dec4e3c1de34463ed1e5107a24. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:57:16Z), 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/QZNW72231176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91384570302e2a19860e00b0ba8eba6aa5a8f08d37108ef8c406380143b98ed1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXD481812595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e80c81c466035079eb7d79cda9115a954e849b944f7393f675822c63bd88c7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:39:50Z), 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/MXD481812596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee4634d96c10a7adcb68aff889076fc7d87220a67468329b81d0e0bc788c55d. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/MXD481812719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e30b8392b79b0e579b1529c48e519d911dbffd93eb85274d512bfb1e584d5c3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNW72377657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd5a0722efa2466ff943b498213936d9e2befffadf7b91d4e97eb2895581c72. 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/MXD481812826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb963d3e072459c9917d8cee050abaa7b390a0547372d875f49237a65a57df99d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNW72335981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce97ad0f0bd34788413636d3d79fcc7d8d17e7d577ad7b9897422d821300b07. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:29:19Z), 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/QZNW72335985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72770e4b2821f58dcac551636b8490978df74afb07528462848d7047e601978. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNW72335988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a552aaf1b58211a3cb721ab80776ef56bee9b5a49dcfc73a035615709d0434. 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/QZNW72335992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea14f78a9d1b320ddadb3eec51eb32cef2754c5ab0716ccfc41c94dec7a899c. 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/QZNW72335994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fdd6a95010ecfc4af54c162411ff8820f7e39eaf76b2173f515e5d459aa7b3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNW72335996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5ca6665359e27ca5e7e49748cacf362d34b3d4a9aa481055735b928beea73b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNW72336013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd867380fe7f390f6a3a43fb48e528f7eac6f43bda083953c8b21c3166d660d67. 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/QZNW72336015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8899fffbbe13f1682662141b9ff3c2d9541de7caefd7045310ce5dea60d0b9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNW72336017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286bafbfdb910f3112da5aef5cd4e7da14ae04841175f38c88d3759a1f4dfff0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNW72336019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3543b90da946d96b23ea41f9bbce7ec9005835471fcc63888c91d3fcbaf26f2. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZNW72336021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e9d8ae9406bdc2bf389b7d0426e9591582633e340ea521317e0e97a0221790. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZNW72336022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb38cdb117f3d87a67d29ffc680e6490e4d95a4670385ec93ce81ccd5d0b57c7. 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/QZNW72336023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2fdb780b60101b5bdab6b5714ffe1e8958db5ced9ee7de3947b346a5219c9c. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNW72336024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5713e7097dd44b0777c44629e6d1b182ac703272227d4a6a608ce84cac450195. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:10:32Z), 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/QZNW72336025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01f1751cfd373f9e703a7c43a606e3c943a50dc86d47b0213463d8a29300f4c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:23:43Z), 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/QZNW72336026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656fb0f744abdeb7036f979a3969ea969410d105cb9943ba6e429c2874de13c6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDQH2429482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0dfe77764e9c08f8838a5e6a71b027b7064156a7a09590aa70018005e1c704. 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/QZDQH2435583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e382eb7e822f9e1fd2ad6893cc1be196faa57e17c10e500dc8e55d43b8cbc9a. 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/QZDQH2444711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af34adc8fa3cf60c878e910f00661fae64c18c3bb1ecc0cbc2cdbf2840cea14. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDQH2444713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa673299e9c69106606ae52aaf6a59fc670e8726a6a831573e4cacc9a7dc6f40f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:45Z), 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/QZDQH2444716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ea6b422a48cc4d26edcb4851d604047fed62f412a3f6d8b2c9bcd154322dc3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDQH2444717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf554ebc6ad172c98bce6c49b622d8958948878ceb55cbe09cd798cdb8fdf050d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDQH2444718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d82d45cd5bc1ed8dc68b3f4d074f805819b11550a64ac01b2a4e24c8ceb658b. 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/QZDQH2506256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a89e80a513d72fb765026d6db426de5304628c070db09fa527a1cce14942f3a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDQH2506257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a95f771103ebf6bd4436e63e0bbfe06b0c8c4a6288e38a2feeeb8db6cb50f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDQH2506260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e963354672112e160b80702de28d0ea804bcee96a84b00da110d87de6858ee7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:12Z), 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/QZDQH2516513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cb75d379c622aa07290e714fe9ae3f8c118133ca80a94358734cdcfee55f09. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZDQH2540434.