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 0x4e5d614ee7df916f49a2a4be8105ca31331f23d9bd22e0f7b50e67ae5f08b8d3. 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/01c61d16-709c-48ea-923e-72fb38f4a4e7.json and https://artists.proofprofile.net/proofs/artist/01c61d16-709c-48ea-923e-72fb38f4a4e7.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 0xf2e8f79998996ad20a06c7b0a3db32bdfcd95f08492be0d2119bd16b08cd4518. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZK6P2228056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d412a390db3746f7a3e9ca4c28c9c747dc3b14126deb465687a1452e369160. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZFYZ2311054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b679ba8641d7094dd6a2afdab08a73fb9fadad5aa9b44d786116eb6b0c810eb. 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/QZNWZ2367267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a01a7f19af5f8f385dff1061a24d0c5603273ee70e4f27a67290a026747b24. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZRP52337314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a92a56d14e1437c7c2f4f09d5e3fa16431a7f557ee103486cfbf269a2baae5. 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/QZRP52337315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf675b5c92e3ff0173a7e2801383992c40f41dd95c8153371e52b124416a1f472. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP52337316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cfb50c40aef5e1bfeeac2a19b757bddb0b971738887a18fb0851a54a0c93bf. 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/QZRP52337317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b679ba8641d7094dd6a2afdab08a73fb9fadad5aa9b44d786116eb6b0c810eb. 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/QZNWZ2367267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83d5455988dc263a0222d5874c59b148ea6654748022aa7d33ac3b829f1100d. 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/QZNWT2394193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2783b1e2eba5a191383f753f639367248422ccf6857941e744a8edc6ef562f5e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAX2392981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55fb4b08a16771a609c53d6a352e0a9f211793c790c9e050f5de9f8b3a3c3fc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTAX2392982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02c028dc94cf462c451730794b497ec36c68ddd2ae7aaf830dbefd80284a917. 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/QZTAX2337526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb55a47f9130116c0ac4faf637347ac53c26643f53d29ebca3b44c7c1403f2f7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZTAX2392983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8892f4c4193bf5117d89ca198d43c0e37318a111b3d8f459a6c0aa1af32bdc93. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZTAX2392984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8299b03350ae4a8377f671ae2d3659e44b1a67472ee68a78690bfbac1adf7465. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTAX2392985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749eb9d2a36a92307591cdd7764ae08fb43d84ee071ebae35b35953f564ad7bb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTAX2392986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa505438d39f0858f7f8d309d6279f074ff6de55a90f4b37fbf0c24dffcec54af. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZTAX2392987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab40af49ed35a558566f0bc1b2ac805d9a7f9d61df2b8d9464719d2a1ef4d70. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZNWY2274553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc488ce89fb29c547191d3743b58962edfcf67406feddf478b520e357bece20c9. 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/QZNWY2274554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4059c3e7724d863fdf80fc534b26c2cc8d9f62fa45fa44946902ad12bdc67b. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZNWY2274555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70491339136b9960ef1481bcb887ec3f1a64a632b217b2a382741e730efa3188. 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/QZNWY2274557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41085edf17984e9ceab8b2daf01693f7ec75972fc21976f53424e3783d02a974. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZNWY2274558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6140a3bb570ad20a43ca9b3fc8355c3ce5ec35cf69b7608826b9a29225826af9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR9W12362958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876a451f070f1e1c5e64bd720da357424daef7e57f286127b1465e9811723709. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNWU2409447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b30d9a2a506a7094414992258e26b31bcdb2ba506bc4d7d5c41432f06d797f. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZZ7W2413506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45af2da2964d23620e4b0e201a8c20c30d2a5f646d5d0c5ba28e117d2838205c. 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/QZZ7W2415562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be3384f24e001ffa2733862087908661243ebebb5b5604f45272c10394318fc. 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/QZZ7W2477450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7045e6402ee431f995babd365d073eea06caaf75650eff4085937b12bc93dffc. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZZ7W2477451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be3384f24e001ffa2733862087908661243ebebb5b5604f45272c10394318fc. 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/QZZ7W2477450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7045e6402ee431f995babd365d073eea06caaf75650eff4085937b12bc93dffc. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZZ7W2477451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccdea55fb3e0d1384f8919fa1b2cc6a1b50a0ff384a9da822d35c3e375a24f0. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAT2407715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b679ba8641d7094dd6a2afdab08a73fb9fadad5aa9b44d786116eb6b0c810eb. 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/QZNWZ2367267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41fd787b9c0e490349a6637500e09ae089e7e95f7d82cbda0e09689e4e0fede. 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/QZD5H2000535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddac23cd06fa998e2339b8f5826f03b5f5b56a4dfb19b7710327855fde5c79e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR9W12317924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ecad317d4c5e4a622707393f2c2574794e138adae490f74cfaac33f9bc17d9. 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/FR5R02400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599c162000dc7f26b37e742ad7c4ff9f67a685732ce6b229967d54ff285aad22. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZHNC2275750.