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 0xa58a9dd43a9fe5a0d51009a1443ed5fec9a36084ee2d1bcb92b8cc7815fd324a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/409d4602-046f-4e14-a856-5464c1b5d894.json and https://artists.proofprofile.net/proofs/artist/409d4602-046f-4e14-a856-5464c1b5d894.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 0x052d1b98f024382a531a83f81fd3590a420d75f8821abaf1857b635943b50fff. 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/QZHN71995604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83278c723525b83f818b9f0d5837c69a8ebd207494160847ffa4841c8b5a164. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN71995607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34431df44aeeee131f951b6f496485b6e4d558acd1cf0f0511952785ee42ffcc. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZGWX2137009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0052368022abd684b56ef2eb35b1b7cdd6b9281a51970352cb54d3747e11b956. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/QZHN32167536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433f448bd2f100076d07b478a8bd2cf43b56f50c0156ca424f0a780dfa55a812. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:49Z), 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/QZMEP2168750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cdbbb58e3c5486a89585ddcc3637a7ab114774ca27f811652c4662e362741a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6H2247533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6813d35afcdf3875277ae32981ebf2c758b6a6ac28ff4ff89a3172e4059ec3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ62577281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3695db138c2756a65554f56eee0b545b20a290cba5037504e89c211cde10c790. 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/QZFZ62577282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2e1b611b2ac1d2706e5f335994c3950511a290cb9009b0a200d7177d91f144. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ62577283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b02c5286e36aee73d41a85160db444993ea493e8dbfafe3babb4e0320d1d2ad. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ62577286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe009a3a616eb7e002a1562cecae223ef612c4e9c461a33831446bd934c3ce43e. 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/QZTB32534022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f901b7b745456510cf10294c17ec8f864d92e0d422a197dd78bf16ef6792720. 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/QZTB32534023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f93a743e64d4d604fbc4538ebaa32f9d35d2d94a45132e280d8d07cba08d27. 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/QZTB32534024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf844bf8ed43a49d35bef2dfbef58f2b79f47b0b3fe82ed9ee3847011d4c5ac9. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:57:42Z), 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/QZTB32534026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41616552fdc0c51a4d5424d8792f0b3f4af9ea8e3262ef6b5bcf7ccbb3ec0775. 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/QZTB32534027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b01a33ee760e5c01d027bb4c30ff51e852522e5c82ca5a12648646087083b0. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:22Z), 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/QZTB32534028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4de1c2b659240ee6e7a1d8951ee1dc4379e82f973672feb099089bb2647f21c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3EX2513679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e86afdc8708d075daaa467a1bc21c24d9c0e8f12025f086c77df39e46ff144. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT3EX2513680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7047de3b17bf11a8b0a21596f058239da3d67cb6a42e43c50ced5a2954fbcef2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3EX2513683.