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 0x3f6c992af501658c500c62ca372aaba0465eb90a831dd16f6113a28f820a269e. 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/889d1c33-112c-4e73-bd7f-7b814ec13d8a.json and https://artists.proofprofile.net/proofs/artist/889d1c33-112c-4e73-bd7f-7b814ec13d8a.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 0x5198cfe16ddd34e06341ad6f8e414b9ca87b94c40f1faf9ac562c18bf9b12164. 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/ESAAI0220255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef2841093097d231af51a2175139230ad2b934e29006c5d8d06add821f41fe4. 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/ESAAI0187910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ab67a2494165132bbd215d48a7b99209d5f3419715034ac85d57b1f75607fa. 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/ESAAI0187912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3fe6f9957a792eb10330a174b6265ff9a9bc69513fffc777568ba7da40635d. 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/ESAAI0187914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772973f04cbdc38a36b8f918d67454cffd83ffdb1f5290e8166baf889a1562ed. 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/ESAAI0187917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcde46f6d33c560005de32c396984f6ed0cbe5ad3cd4fd1f4f8cefbe449ec19a. 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/ESAAI0220538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b5c6661ef7e04d4f83ec6c62bac3bb5e855cd4645853fed9bd880558dc7ad7. 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/ESAAI0220541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4137de96fab8f4d5cff7a9396d60556a2f1274ec78232a4da0a9656d0faf9e3. 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/ESAAI0220543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30be7b662efe93bc89856f42f95937aa181f3b173be1406c37acff76a50a935e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:19:47Z), 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/ESAAI0220544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fabcaf7b13c8016fc4326fd2bbf6e9c6396a4c822d1967e9d4602480239ef08. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:51:15Z), 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/ESAAI0220546.