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 0x055af211a13356ca8d76177f5fb01a6fa1f8f79d99efa020c81d411c200b85ce. 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/307ce3c8-115f-4f6b-85b0-174b5cd6e126.json and https://artists.proofprofile.net/proofs/artist/307ce3c8-115f-4f6b-85b0-174b5cd6e126.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 0x6ee5cd616670dcaac4fa350b7e458d508d58daf7efaeef7ffb3156d3a6bd8027. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBMJG1713632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3cbd98a85c6e2fb5e7d616e91db3d71d49e9b5a56533eb6838193f2e59e80c. 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/GBMJG1713633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf052da8b5849ba7022d2fb32e6d218d8eb9f8f04589c6ba7d2ce2548e5e538c9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBMJG1713644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1654d737404e6e46cb372fc03c6aa8c824f82ee03e6de5de4d3840cdf67cff44. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBMJG1713647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4e0c8f1543f6fcda05566ed5ab749e3db4fa51fe5e06fff8a53150c9d1fd05. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBSMU4428113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baf4bb69a540962278af6f60cf5c814a34b0eed29fdeedb8089299478a6527d. 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/GBSMU5665767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac65476b47066ab9b4798d081c30b78d2ab73b4780b0aefe9eb59603931b193. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GBSMU6274715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbfb2351b0cfa86be6a4f657aac4d51ed70c4475d751218877a7178659588ab. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBSMU6546497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8959f820c8bda1c2bf9ccbf57880d1d0c10e7f7f45f16844d532c46896bf0f2f. 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/GBSMU6690833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffd8cdf65230f7d327679954cb0613e4b45f12e21c1fde80f520b1fde6acbb0. 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/GBSMU6792433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f506e81543e56660af9cbb3a5ed31b0eb9b27662f7ec601ec402e40b44d1f1. 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/QZHZ31967324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389caab9526431a4aed48a12e65863cd4285648cf5fc38fa1c46cf8b987dbb0c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBSMU6959449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b020dd96215bbac9531bde6fc3fcd73d88fadfaddb1915f5b9572bd9b5da65a. 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/QZHN71952990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24e7e1ccf97fc59a7795b64343d2743b5090d7b7d17b2aa329eafe73f6a0846. 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/QZHN71989125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd050d9d20e14ffa535c2c995ff8acc8dcc08fbe479b8c03dfa84d0c472867219. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZHN81936684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce86be8adb823c6bb82ca9e1e3363f5480892bac072ef6a9c90d2e758ce36c9f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/TCAEO1953680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a95496e95506a8c0ca96cf83a661d5de6ed9b28ec58f2da3020202c6bb809fb. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZFYX2030153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af1f347b67e74d86183e623b644dffaf4bf780827353348cb336fdb15fea3e0. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZFZ32088669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38d8d93bb6f7728cc1ea01a4d2256287a06717777285892a4c31a926770f23d. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZFZ42024010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49d4d8550ad9151da98017ffbeaeabf4841aac44d45f27f739c40c7c6c9b825. 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/QZHN32004611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75aa49a3a37bd9865166a58b1440d99325d0203cf1efe2d20d2abaa9cf49ed3. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/GBSMU8301276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f781c8fc8a364b9d2807ee9aa3b1c79e167bf84ece73b1cc64fed070efbe36. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZNWX2058033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78233783a9cdac07310d87213e668deacf6fba9c517a9927ec9dddaca848f6dd. 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/QZFYW2148897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4e8d587a559c6e5fc8c228f9aea713841eac4fb86b8e45d81791a98d31ea03. 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/QZFYW2148906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47602ebe419843fc52c846807da8503a4afe293d46584788793530fd46424a52. 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/QZDA42146020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6219756e132b4137b677b0bba8b82bfd68558e5177041324bbc102fcbc53660b. 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/QZES72124844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3be5a64a2b72aa533712ecbe95b006d61bb71be957c1c8f58e3794c5ec018a7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6J2181800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29513b1f4e9a3ccb9bf7f986c71a6dd54493dd59074259a10afd809d8756623. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZTAT2153949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933c6dff5ece30a1c83a5ea9e340d08d25c587c8d254b9a92d1a562c38d70e43. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZDA62214336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85f83fdd87d5084eb4d89e2798be49caa708a701eb51130ec222c24b109f34. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZK6K2214492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb27e1c4f124944f9855f09a57a90fa9dc77a9eaf2abeb8ba259b53f3ab5651. 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/QZHN62489286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069aaf8703060ec38d2c81ffc84b8a5f215727e046e10870b6c9da0bc63a52c1. 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/QZK6P2452518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff2ab58229023cae9f22539a881c98a193f5126531bd28f8d1da68a3ddfb087. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPLS2439762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ae8cfed3e4e751ecc515144dabcedc8f2d295e21c01e7df7879759927639ce. 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/USCGH2109224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149297ebaea716daa97d60afeecfab1dbaa4505d6402050829ad8f7ebf43e6ea. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCADN1814471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d03969936ff932305b9cc7a259aea82b8fd893f0eb1a80c50ddd3a7b5266c33. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ51970515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ef158edfeae8fb9171e088e5f88ac2118386bcd920798cdff7170420f1f0c7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZES92105399.