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 0x28f83ff6d28501e1732aa5b3d2749e458b56644223ff0e72c2735f2924e37bee. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f36695af-a207-46b6-b15a-69d1d95cf6b1.json and https://artists.proofprofile.net/proofs/artist/f36695af-a207-46b6-b15a-69d1d95cf6b1.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 0x409c938e3bef95ae257f7d2365d138a750d2edf39283e3873713e0888ab28ac1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMBZ91507052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e33e637e511b30a04ae3d055bdff219f9dead7a4b40f8841b3b34ff2f4d1d97. 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/QMBZ91507054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb035ef656bf57838cbc0ad1dda242e71cb47419584f8ce1d4357aaaf74ef9a03. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ91507055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cbe5633501a903150df953c24509b7b565be936f77cd82d1863f9636448a5e. 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/QMBZ91507059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9796d88be21c87b9daf0522f95b079c60361657a4fe2644dd4bdbea78d538a56. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ91507060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81d81a617845335c700854393d845edb218156846ab158e7d43d08d4a1fb6f1. 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/QMBZ91507062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b767636bb835e5a497f0f71912f96177e9bc1392f3dc9c43e94c65d46d34771. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QMBZ91507051.
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 0x36448d44c6bb5deaff27a4e4ef9bd8d9325de2d86ab6bdc33719698abfc5e1e1. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QMBZ91507053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eae09f163f32850f38d199fcc0f9e13eb0c5982faf8cf838c80777c9041f4a. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QMBZ91507056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d8d3f367d230776dc95bd44c07ec7e715f0cab6fbb875f1ab2d4c371e284f8. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QMBZ91507057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd85f2c73c5fcf689d2a2db16bba1c3957a26aa0d596cbb84fc373fb9e26e5b0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ91507058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcf2e2a05ead7a4bfde637407d2816b91ee0ee004d92ad918e98d1bbd2f6c36. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMBZ91507061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4836c7b687593f2d539f69973dfd1895b521423a0b80d1ef765c56977dee3af8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMBZ91507063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6ea00a0cae4c67911ca17d7d8b312786c8a70016dd245ecda7c2df5bca3bf4. 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/QMBZ91507064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc93923857abd314a5ae5538f857b9ed557d6f6f4b86b3892c29ab497eaa7a0. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QMBZ91507066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa337e0047386641bd23dd02c0ae377e2def6b05b32fc6393453a4aafc36adba0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMBZ91524035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9328ce5e74c3a99da2dfa6797a972f8fc2b5d440c369606fa9e9f5e2fa523f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ91524043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237c7595ab927a234c4f4d6a28df35c992372b009ef5701e142f341d372e0873. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ91524050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f903b8793c3d03c2069153d5b43cd946e64faedf8517ce77eed1fd34d75700. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ91524034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef58b67fd404e7091ef91e548b58424360d832ceb143fd717bbe1860d24164c7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMBZ91524036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530421c38e00126685fc8801a7b4bd0d9f293a7ae28af218949784e8a4539078. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QMBZ91524037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0b2c03af9b8952bbfc70c635fe6f0a4da17f5f366ef80e4162568101d22e14. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QMBZ91524038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe767db24c8a2f20468b3286fb05c2759a8e0bab0d86b2b821ad1c5aafe108c04. 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/QMBZ91524039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c775248913decf4c9a19787f62a794795a07f631d0a3b246ccd1ac7144f569b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QMBZ91524040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5744f6658b3cbaf0a2fbe11f5152c5458787ccead4b937c60fa8950ee5e7728f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QMBZ91524041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f34ba926fd5d7331ff3151da622131128cb233b81e49e76703ce98343f1732. 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/QMBZ91524042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebe907ee99756ece680cf755e4691c895094fe8b29b6a302a15fba66b1c681c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMBZ91524044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93674286fd96b9fcac9b30480096cd3c0ee84278caecfd6086c5b311255ae4e7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ91524046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525fa4b71d8e73a1cca14246c950cc33c0f8256f6566ad2b983b43c2534a740c. 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/QMBZ91524047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49d306b024d4244fa2972f28c7e8c778630c7ce56d190bf5a1345a0a0aa5c52. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QMBZ91524048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09555d3340c9c59da2fbf04a995beeb3670f8b508af85b10802ef59775575c82. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QMBZ91524049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53575a0ec020f9cc05f227f0677c4e85645a41a3db8b843c3f2e9f95e94b78e. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QMDA71540635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe21a1715ab4b22e2b42e1621244e162c7cd8654a0d675a04278b373edf6a903. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:37:39Z), 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/QMDA71540638.