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 0x596ca3426f5377bea46182e9f7b2e0ead3a0b15c2b61a4fb94759b1612445b56. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d71a6d6e-80ff-40d6-98fd-a4f53969290d.json and https://artists.proofprofile.net/proofs/artist/d71a6d6e-80ff-40d6-98fd-a4f53969290d.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 0xd909f9227c705378ef72fe19fe51c7ed67574a0152391fab0b626b7bf3e53973. 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/USL4Q1858922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c54a21bba827b91c7186631597a1bf4b34465cc9b3799b6309af32c31517a3. 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/TCADL1850605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfde4bd891e0938911053191cc48927cbea349ee57fad43975db57542110fd8. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TCADL1850606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3849e35615afa4c84200564bcf393684f237d134679ba5f5f2f26ff61ac38356. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCADL1850612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0071ec13aae7e8c9f58c127fe46aba5273f0402bfa0c6cb352ccfc35a13038bb. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/TCADL1850614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b1ffd6a326d936b0150a71f2278d0f75b1a187189247b43fda9d3b129c4132. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADL1850616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e9a4b80c68ec03c4864e54110d9976e76508a148b8e52326741ef4a7b7dd36. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCADL1850619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec98e31cd026c741623276c58fc2b13a45b6cb1b284b18d698e0e698886484d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADL1850622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d5191dd56aba59ef5774f276b3d051eec748469cd4722bff232dced9c587fa. 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/TCADL1850623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ad51cdaa26648b950dec87eaa6c9b8e93f57aebd90b24ca3f275ea6415ed07. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCADL1850627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8ac0584e782cec852b6bc27c6e2d2090dc3f5db3859e0a2af5d686f46858d5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCADL1850648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a6ac439a4af9bb08ac6d86ca38d3a02f90cc3ae9ffb1062ab4512b5fb24b36. 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/TCADL1850649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155370b7527e0f48c8ae8dbd238b0a55c5ed347ac60ce423140da4d8bbc8ffd2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCADL1850650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52498002a3214fac7eabca060ffa9446e0f3c2d8b1f61ad3c1ccc3a1aa29757. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TCADL1850651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e614bc6194e724b9e47598ce7185c35c5055557228cd1a1cb9856154019145d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCADL1850653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11aacb2c28758c86bb8b8a22579e5238d52b7f7b4feb4747002f799bb97ee12. 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/TCADL1850654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9b87e4d58b4853d274ab6b7797b923a15bc388738387d129e85678707616fe. 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/TCAEB1917019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0c1e716f25e57f43e97797afae153f6525dbec3f9ae7e8d807f33c738dcd7a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAEB1917023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ed6bbe8312983679d0a8403a7859b84be9df9c44b4b140bf455fcb9c47160a. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCAEB1917028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45466b0b9025abacb91e32eb9e30ae36b0eb9091d47b03cc07aa422a389b42ff. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/TCAEB1917032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa404dff8d64b95972b20b7f8df9e7e30ed3f96413d9846d155b04d52037c18a1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TCAEB1917035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b58510107eb72b68fd6becb4f9dcad6d156ae899d1ce4fb19008e4a313767f. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/TCAEB1917036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d0e2b24bf4dc9e2a13f7ae357b32185ff1ba8bd06cf70d72a6f4203bee8ebd. 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/TCAEB1917040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503c9385e7174048035f0e6c32398f2ea3e89f9e674860a76188d206e08dad37. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCAEB1917042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59fbe77f8ba593668c47ab223d6f74f00d7db2679c9957fc33eed6de206a0e0. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCAEB1917043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3b3c9dcd3c2dbceb3725dccc27de721dcf235b0fc01a57e5626b3aed377208. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TCAEB1917044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc302ede8f228ee64d575b9f003c2d4da385072d64fd9b3402e0f655a9dd0abf. 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/TCAEB1917045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac12e3a07d07d3788239993b0cba57bd3083ccca4406c68e85811eefccba809. 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/TCAEB1917047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d703eb4bafb6bf903c89279d1f14568d682369e44542dde60744f177a83ceb. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAEB1917050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1839bba8a81c5b651121ecac4830a9a51ada8778e845316bfdee490cf154902f. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TCAEB1917052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be6d823bee4d2cbf8ae2611a3af2e4ffb1b5a99f22403e85421b98a9ad30f32. 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/TCAEB1917056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0111c01a1447f9cbcc1b26bacfb68292cf327b488a6fa5cb2aeb6aab4fa8b86d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAEB1917058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1fbc115ab0ceff5126adc9c69576d61144ef44466ecd720dfac2e818e9d8f1. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/TCAEB1917061.