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 0xa0c79373f9374e182b425acdd43b389191350a227e318387fa8a42760fc8927a. 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/b013a073-1650-4a30-9849-fec68b4e2115.json and https://artists.proofprofile.net/proofs/artist/b013a073-1650-4a30-9849-fec68b4e2115.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 0x423697176c612242fdb7f089f686b9c13b4d5d9264489d431032c25db13d6671. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USA5W2300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7c466fe24f9455f2a850b42fb0a96416e56faf70a26a63875089578df49d3d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:53:24Z), 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/USA5W2300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a37ce032f5428a4fe5618d7edafbefa358dbc529c5e87cecf4aa992baa166a. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/USA5W2300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22823099ba8adb3431927e87652ead3fc18e78c76c69423e244fa9013f3dbe46. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USA5W2300700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ed5a3fb6d4b10b782dafae5ce0f1b549f668590c1f5ad2f7b6bf26fa8ef703. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/USA5W2300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838665d8e13f1a1b41a5597b709d88add803dfbbca4628ecde0f90ae017c3546. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USA5W2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494ade23de2e59833d3b4bc0139928b9cad4a48ca0a5424a7c6db4d76899d301. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USA5W2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4900e944a5d623b258ea557c2682e4416b117989a96751d49e6a0d3fdfc1cb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA5W2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc5966542db955a798fd75739553d39259fdb4fafbfa1092f3b3d36c4821b69. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA5W2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3136357e4d48a527dce496b780df9ba3cecc53c324ca95fb16e0915e188f24. 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/USA5W2400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd9281ff12147cc693471db39fe635a6fae7ae6a28007316b221698490f0165. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:03:39Z), 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/USA5W2400099.