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 0x39c59bf8665a9cf3e96f59c52e48c26ced6dcff0281a05fb738039f610217f3a. 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/40316889-f971-4554-a70e-501cc4bb8740.json and https://artists.proofprofile.net/proofs/artist/40316889-f971-4554-a70e-501cc4bb8740.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 0xefa0eda18d4d32a327816816292091c043452bc5ec447f32fb8ffd8e344b61fb. 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/FR27X1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5144354ce4c93a9d821d72ef21fa1349f745321bbdb827246ebe89945bf5d36d. 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/FR27X1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c7829546da17db5e053c620d9d321ac81821779a346e2e71ccafddff975216. 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/FR27X1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9001078ef1dac8dc4316e4673766babbf88d2b14e19822181a613dff85ff52ed. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR27X1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4ee3ece2aa929dc3e3c5e3a36daf81062fb5916cb1a6d2335ee6eb15b5132b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR27X2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72d2c8419f3575c96e0e7d6d3811f140ecdede49f112af67c944f5052aecc62. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FXQ912400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9685e05e6f3977b11e2fc9c6e3fdd1c4af024017e9641a677064d65f0721409e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FXQ912400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda4d36be4021ea4b34846322b1e970728998fc681ec4fdc55bf07b4737f99f2. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FXQ912400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9748ffa76c47068fdd6daabe1770c9c8f6d7e6a325b7b9597ff9d580af672. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:25:22Z), 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/FXQ912400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2396a36debc06c6d11542aeb0a8e1e5be3aadb1e9434e84b7ef643f9ec7f38b9. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FXQ912400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d2906ac6ec7ce4d6b593908018785e66a67adca8a19557979b39b048a87505. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FXQ912400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304a2f875fc78c6bdd07f755e04c8f2df1fa2ba7541ac1efc69f6f8b986feaf3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FXQ912400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb3b3d36f2b43d4da2f3f8163fee7153190f103a2ccefbf8b4ed772de103f1a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FXQ912400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b984eafed3e8656efd4e2f42313d912eca2878d1b6ee845843eda9a315e42f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FXQ912300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9685e05e6f3977b11e2fc9c6e3fdd1c4af024017e9641a677064d65f0721409e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FXQ912400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda4d36be4021ea4b34846322b1e970728998fc681ec4fdc55bf07b4737f99f2. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FXQ912400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72d2c8419f3575c96e0e7d6d3811f140ecdede49f112af67c944f5052aecc62. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FXQ912400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9748ffa76c47068fdd6daabe1770c9c8f6d7e6a325b7b9597ff9d580af672. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FXQ912400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2396a36debc06c6d11542aeb0a8e1e5be3aadb1e9434e84b7ef643f9ec7f38b9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FXQ912400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3447f8068acbbc7a73ceebcef0b612110da202cc19d33c08f55f967c8b1c0be. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/FXQ912400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65f7ec5b93bc823b445b01032d1cf014f28905d69b1ab38c99c33743ac11149. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FXQ912400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d2906ac6ec7ce4d6b593908018785e66a67adca8a19557979b39b048a87505. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FXQ912400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304a2f875fc78c6bdd07f755e04c8f2df1fa2ba7541ac1efc69f6f8b986feaf3. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/FXQ912400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb3b3d36f2b43d4da2f3f8163fee7153190f103a2ccefbf8b4ed772de103f1a. 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/FXQ912400013.