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 0x75bdc62e59e1ba1b54ded3425354d7d03b3f3522680d01514132ce6c0fb00b82. 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/71fdde7d-c0d9-4aeb-ad3b-5e1de77bd114.json and https://artists.proofprofile.net/proofs/artist/71fdde7d-c0d9-4aeb-ad3b-5e1de77bd114.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 0xa9ee6b5610378193172733bd90d17e58ec5a4d61b50abe49a07f9bd0a745f991. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZK6P1946301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cd117befdf84d73ed63ee0242818f04f22f9a24c33bacd36f3e2d56c521436. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA82079696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489e13386c1ded6fa05e171cc07abe7ef35672751d4f70ad77efc6081c1e1228. 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/QZFZ22034805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f33d93e015cf1883aac1b987c04087961beb31fb577478e16971ba0f4199f. 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/FRX872156301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd7d2b71a4307f41cde1bb9590d4ed53fe17748e2f1df430ce109ae6c247265. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRX872290445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef07d2ff0b494810613578234d67673027ce3e67833fe2df804febe27d103a2e. 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/FR10S2329151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472a27e9b9e99ecb3c4d2ebdf824716038c6d288652e0d2bfe52c6e935cc4e34. 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/FR2X42317659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67430b23137f27236be0c8f8addc3929bf6b6a8df5508cfe250985e36753884c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X42343634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d1f26d2d3ba01c2b92755f3963cdd1c86a0b3a8969cffe7327a25407757aaf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X42343636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472a27e9b9e99ecb3c4d2ebdf824716038c6d288652e0d2bfe52c6e935cc4e34. 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/FR2X42317659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc501978c67f9b5e4d926d44057c82fe461451be7d88c5600c5c3631b3bbd6407. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR2X42343638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cfe062834ce498fa3c8505282130a3cb87578e96d3a3cc48b9b82ff4c4e896. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR2X42343639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4767f4e4989d5c00847d0202b916c9b0ed66caf678370f19e7fa1ca6ebd251. 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/FR2X42343645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dd399f95c9207a7da0025638c9c3ab1ba59a434e78c83f14ca8ed116a45d45. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FR2X42343646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5735e492341c1b59809db0b754ce44f4051d1bc0eb7ffc1347467094bc303f24. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FRX452308480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825eee4712ac7fd78e1eb2be14d78bfdae3d774cc7d20e5f5501507a91b97c33. 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/FRX452308481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6038368106a9c529ecc2b92275168bf9b4707ee989ceca8b0df904501f3f274d. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/FRX452308482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235cd0104fb01bbd386678c7dbc92e276aaabf60e92f992f1a3e66397185d959. 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/QZK6L2352665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa1e1b2c8534f0fae3d85d3367f1eaacc94433153cd87a9d8cc17279ad2ae85. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA0L2364430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f707bd510f719e6ccdfef88aabd6ceb178537bebb7609fd647f41eca971d3bf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA0L2364432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9bfc2b1adedbb59619cdb8c8f7fc201cf6349aa7651ea7a432749d974b929f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DGA0L2364433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc93b1ffadf6ebc5cd84730787a71c537fb27b565d2c23afe8bf25f482a1c9db. 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/DGA0L2364434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf1499fcf51519fe88320b4f9d829a02eaab1caa0e74a3fdfb63466f9d8d847. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA0L2364436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d549c0f1d6325899141dbf00d3272b087b1f8863cdf7cbf824f05fa282f31d. 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/DGA0L2364437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46735fe2b9743d500da963c5e51fda0d2092fc5d59ede475a547f36892cc195c. 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/DGA0L2364438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95349ee6077d8a8e376d4e15bf2750e8c20e0cba5ecf24e1bd43a72991fc6d8d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DGA0L2364439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9029a949a49b12bf505357918fa16a368416aacd59f5aefff66de44d4fe4358. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DGA0L2364440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd794dd13ca3ba445ad932aafdd0f852417ec337bb14337c0cd2355162adef71c. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FR10S2404437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf481b50c633c20ff6ae783117678422eab34c56f3383319bd7c82eedb4687832. 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/PLI367831230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf481b50c633c20ff6ae783117678422eab34c56f3383319bd7c82eedb4687832. 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/PLI367831230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe2c5c5d2257869ec10acc2dd91a0afe4f0f87f436bc9ac2d7505294c2b2282. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DGA092396407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f5058c12eeacd745718275984123d655a95dd389003febdfd6a0c2dc1894aa. 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/HUA612302092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa48b2850a74f8edf22f8576b1afa03ab5a816ad79ec503ea3fa2617f8588b6. 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/HUUM72200011.