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 0xc7d9e2373cdd8038f6287387df63b9ed57fbd47b9af9568cd842c67c4e398c28. 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/0667797c-c793-47ec-a502-b40481fc0b40.json and https://artists.proofprofile.net/proofs/artist/0667797c-c793-47ec-a502-b40481fc0b40.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 0x4d674c1106bffcd9cdf559ca82471e7b1d8e690cf8db130b5230e2b14e3a2dc1. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/ES6080981703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af0586f963b92639457e44a380957484fd9e5f67fecbb4cedf0bdef21ced5f5. 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/ES6080981707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9b1ef2b0371933b916aeab208ddf140fcae6d96da560fa799c57ada2b4200d. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/ES6080981708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e45294f76c4db015fc64b104a74d2b828377676803d37f44fed83699a0e1b9. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ESA092210204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece0c0d08247864f06c417cc7913bae815b7dfb4ca2e9467fcbfe082dfd0ef8e. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/ES6081140807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfda2b19efe1bed3c942f47c5e68f43e93a3f4ea8cb2bdcc7bfc8b35608f97a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-27T13:32:39Z), 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/ES6081140815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ace334cf8a20055102e8c999c941f78d5f37d10daf4409e745d34ae0133301. 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/ESA011707266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f815c38423d6d80c6ffe7a692dc4ba995a5eb46ea0d61e3a303c4a4f9f2d767. 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/ESA011613444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a8f63bdfea4258fc2bd0cf0d4e713beaa443910fc46948ff3ea4e383bef0a9. 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/ESA011635873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5eff5f17df14fe7ac0ea1c6972eda4cd38642dfffa4a045c34901920ca9c67. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ESA011790955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222f1663a5e8fbc1fdda2f5eb04fbabb671bf597b8e10ccde27962e2c536bf45. 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/ESA011790956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6697069e669f099cda01df1e9a0af935cdb450562b4776f5c6033c6ef0982e01. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ESA012073373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8d03a55a790d5edd1c52acb95bbf1ad59e297ccc24586c92865c4f555e57a0. 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/ESA092412879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5a3fb41692cf3d9ed1771299d2a7ccad749d9e96dd9c916231791910ec03b2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ESA092503679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb15467f468fd2f8d023b3ed8fb520efd4f72daa8d449a9e52f8b370d072319c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:06:18Z), 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/ESA092507860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab4dc57ecb9ca761e2793ff4f9e564678d18ed962b5e102ffd3a78fbd8b8ac5. 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/ESA092508830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6623609512d2ff371ff3321cf7a6efb7a6689327d07bf183b7b32bdae64a036c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA092505552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d00c712b3b10e5255b8f918cc26fd3012f8ed3499bc0fbc4a2b805573c03ac. 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/ESA092506929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbc56633005fd166ee084ef95fb93f17e72609c544e802718efa6af0226b158. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/ESA092508395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb15467f468fd2f8d023b3ed8fb520efd4f72daa8d449a9e52f8b370d072319c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ESA092507860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca79e32ea8c7a79cced6a3f503361654d47825bea70693d72fb5fde99ce347c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/ESA092508831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3e1cf413f7c0cb61190158210169a870b6bc33be1bd8f682a4906d8f6b9c73. 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/ESA092508833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f10a5bcea81b2faa1cc55512c6c4a66347bda18740bd5da358a3c9b1293b944. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/ESA092508834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda550e251e942ee2d6e3ca5564c7091e04e457cb6443c00e5c23196bf03c8081. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ESA092504774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331bd7078d226424a1c4655221e324137b9193e0ae3154b0f88b743661fd245c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA092508836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5a3fb41692cf3d9ed1771299d2a7ccad749d9e96dd9c916231791910ec03b2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ESA092503679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b415657e870e184c977ce600d0e878368124d63ddd98801b2c68c240446d7db. 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/ESA092514925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59499c3cf8e01309dc54d4a00b3cfd66e7b0cbd24469d0b54b66b3acaba80176. 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/ESA011800897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f52b006f5ac5062c8da67d36c564d43de462c009757dc9d4036172e98a34563. 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/ES71G2024756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1970d4e041b5e196eb06e24912227b8355768505c6cb86ad9a83e0fdf5977ed. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES6081142725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06b7e80a46d347a9fc086b617d61e4464e2a39750b89e02205ca3f85e17d16e. 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/ES6082010524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97957a0adaa8548c7b4c9644d5b36c0746185b2a689a5be42fbdb136cc901b4. 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/ESAAI0189618.