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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd909f9227c705378ef72fe19fe51c7ed67574a0152391fab0b626b7bf3e53973. 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/USL4Q1858922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c54a21bba827b91c7186631597a1bf4b34465cc9b3799b6309af32c31517a3. 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/TCADL1850605.
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 0xe6d5191dd56aba59ef5774f276b3d051eec748469cd4722bff232dced9c587fa. 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/TCADL1850623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a6ac439a4af9bb08ac6d86ca38d3a02f90cc3ae9ffb1062ab4512b5fb24b36. 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/TCADL1850649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11aacb2c28758c86bb8b8a22579e5238d52b7f7b4feb4747002f799bb97ee12. 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/TCADL1850654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8ac0584e782cec852b6bc27c6e2d2090dc3f5db3859e0a2af5d686f46858d5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:03Z), 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/TCADL1850648.
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 0xef9b87e4d58b4853d274ab6b7797b923a15bc388738387d129e85678707616fe. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:10:31Z), 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 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 957041 (2026-07-07T13:25:45Z), 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/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 957056 (2026-07-21T23:09:57Z), 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/TCAEB1917036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d0e2b24bf4dc9e2a13f7ae357b32185ff1ba8bd06cf70d72a6f4203bee8ebd. 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/TCAEB1917040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3b3c9dcd3c2dbceb3725dccc27de721dcf235b0fc01a57e5626b3aed377208. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:52:52Z), 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/TCAEB1917044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc302ede8f228ee64d575b9f003c2d4da385072d64fd9b3402e0f655a9dd0abf. 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/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 0x8be6d823bee4d2cbf8ae2611a3af2e4ffb1b5a99f22403e85421b98a9ad30f32. 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/TCAEB1917056.