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 0x52f74bc21a59b40d85ccc1686cd490ea783cecfcaebfa88403ac0f3ab5db54b7. 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/27ef29c2-f22d-4885-bd23-ff4e4212c9e3.json and https://artists.proofprofile.net/proofs/artist/27ef29c2-f22d-4885-bd23-ff4e4212c9e3.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 0xafd90652de32a67e7876f83e0b6272c7115ed9a8ded9edbcb2ea3b826bab04a3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA072182383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50704f80dc628cbec41eed03b1f6445386bda2f41c20b78cfe0f18bbea543e1f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA072182384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08af4fa34bacdbac875bebccd4e2e1e5cdde8b95e92aede3a7be26a34347914. 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/DGA072181328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcfa6225151b0191b37c20bb24ad83aed9c06311c34f74e1d98c2a238574ee5. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/FRX282218403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc731bc2e0a918b01ce10a462944feb0a70632ee4dfe0510a8f0b4fb9fdb61c1a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:31Z), 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/DGA0M2393573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b422942c58f3147611ef2658d4444fbd4ef3ddfb9ec3082220bd36cf8062971. 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/FR2X42446388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667df42f9dd301a5573f500be320ad73e68accbad5e78862e9f6d3cc7992e656. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DGA062519437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8783b1a164face2c9a960fdc309b4aca3e1b299019f328659237b6741eea92. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:41:37Z), 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/DGA062589798.