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 0xb8b6d76759a667aebfc504a2519ff1d3bb53ad9c70aa9f80ded0f4b5827730df. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21ae49f0-4b01-4057-91e4-4d3a9b04791c.json and https://artists.proofprofile.net/proofs/artist/21ae49f0-4b01-4057-91e4-4d3a9b04791c.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 0x9b84f42e10410d713b916f7f19606ebf850bcca6cb4000052a490891fffe5496. 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/CH7812419723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccd85a114cf14b8158abde9f350ee77a793c9d1af982230be069a26ebbcd222. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/CH7812419727.
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 0xce13a309c885307dc019b28c7309f7eb2798134d86137ef174ed654001be02dc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH7812419720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dc9bf6836f2d8e1c87666dab14345290ea7a73e2423f641bc98a10211bd8e3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CH7812419724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fb8ed6ca7efa6b31ce1653a1f7f5886faace5cbd54c7705f07ffab02cb7d19. 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/QZNWT2094852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed592e2a2c6452fd6dd8f880d7ffadfea5be84df26f17260d0faa441dfda98b. 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/QZNWT2094853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505c9156710817aaed75c94476c6c3ed4c3d68177eee641da8d7dcc156e7414c. 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/QZNWT2094856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb03d3887d91ef6aa57efb4bce8d3faa7ba13ca60e3b6b8c5bc67b8e73d3b12. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWT2094858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f215c9386fdffff108a1d87caf00e55572a77e3729dd0085decfe59235588ff. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWT2094849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eabf19ae35c9bf35cd8d2decb32166a2e7dfee553de1d46317c04741e58ca5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZNWT2094850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8936f4f8c3f3608062229b2a4618492b760f897de9e2a0dd31f5e6d06f0ddba4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNWT2094855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30b8ef31937bff5489bce5bb016d15329cae710299b799cbe60c94c155f8ae6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZNWT2094857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f2099f7580c82859265e6f296518863e0f6a4d45246397031a2f7f23b4dbbd. 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/QZES92332005.
Hier, bitte. Eine kleine Aufmerksamkeit.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8768c49639ed5b768ea3b70050364e013ffe30a5bec6079cc3c4ee0c4d7328. 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/QZK6F2009649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00153d346592437e055f15b5045dae8b102babe33d5c4c854829cbb81664bfa6. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZMEN2208661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7c4086de3a2d0084baf50192439c536114601912eccec9e507be95334c665b. 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/QZMEN2208662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45576d352c66ecdf9c8d031d52604dc7cd273ef69d3b02c3fdb7e41901e31a4c. 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/QZMEN2208663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8117fa7bcd24a963668f7a9bb78f3c2ad372c9a49af8e019e4f31179dc691b0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZMEN2208664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0f4fdbb62f0b7edef510c91acc821d875196e11e37637bac2f1ea378336aa5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZMEN2208665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a38032369b3aafea43b6bcb3e99b8bb07121a10c5ce887600fb8b9b4ce478. 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/QZTBD2573042.