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 0x7881de02e0280ca4ac1b74c13ac47979865db626d848ded14f70b39b05685ad1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b653b749-9b0e-46e9-8f34-bf423ee4c78c.json and https://artists.proofprofile.net/proofs/artist/b653b749-9b0e-46e9-8f34-bf423ee4c78c.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 0xa12159392f064946433da641c49724b22fbe5a5f0df19ac60489a15488f8695f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZZ7V2425214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628a473c4bcc58a9579ace40f2e14dc112068e4a3e96c21e8b71f2b17c51a81d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:40:20Z), 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/TCAJC2424948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e6be6f7c33f703cfb98f91b181893fc957324c847703782205e62d1fb5d593. 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/QZRP42456393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35b9f8d28b356d4dab25b35048aad9d0de6e65e5dbc32f56b09c286a60d35c3. 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/QZRP42456948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b606f2b59e272149e54c4689fd277023b5e7c82e87b4f8e01186bc6608feeaf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZRP42456951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0701f63e2c597ee92aef75182208f2e95a68ad2760e9086bf239a940b4121573. 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/QZRP42456952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087d3d7283d3950613e8404a236140d4eaf70abe6d412af4934a4605d8267b8b. 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/QZRP42456955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b204dad2e260d277e8fdde88a9916d07046a0dd7f6f0281a5b101d458e2e50. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZRP42456956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd1d6b2671e36e7e5c0c16c31ce4b26c8be34ef4e89546299f2c23d226e8529. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:30:07Z), 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/QZRP42456975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2ffebc2523c9e33342f83681789ea163d3822158e84aa3708e4050cc690214. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZRP42457378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c528869a935bfd70b654256d95918dc410887618e268f71f30fa1c8828e317a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZTAU2457223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6ba2bb1e155d913ef2239a28da0c53a1bb6939d25211210edadda47accfaae. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJG2597978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2521964e2830e98f885df3b70ecff63bfe2441915de233f56e4d86da5faf4cbd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:38:20Z), 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/TCAJC2414346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d954f6a85cd6f1390347dbad356f54aef74009ec29658dc6c1bf716db520887. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAJJ2509058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a6a92fb38ed4731b602ff53a8bf82e0c2c5cf754e438bde04e419077781344. 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/TCAJW2545792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe270f10ff3cd5e0493c001053f483006bed5061f9f8e04264a591254ab8abf26. 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/TCAKA2528004.