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 0x7c517819d46e50379a3ff1ecd9ba33fb27d9f32cdd53f9e36ff27c11adb09b86. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cca59f0e-f8d4-4912-95e5-b5d68cb71c40.json and https://artists.proofprofile.net/proofs/artist/cca59f0e-f8d4-4912-95e5-b5d68cb71c40.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 0x60277a91fbbd23d8062b0ec59e95f071e5966722e08256c1284a3e26b96bd847. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFZ41924834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c16cb3fc5ef217d31e46f0c74c28501f8933c30039651f3b5feea65ec0b7341. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:58:40Z), 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/QZFZ41924835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960806dc4a57b7fe7ffa68603532bdc6a5a51e6eaeeaa4c0dbff07e8dc170295. 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/QZFZ41924836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf520ddd199029ffa218df4355b1ea443d5c0745e7dd55ab51b78577785c19b02. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ41924837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa6286914864b8ecd82b88d0c101823ed58f1e400be52200a5d1a554751005. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZFZ41924839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e49c8f1b40d73d3ccc6d22182445080aac6dd8fd31704e08bedf8070acd47c. 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/QZFZ41924840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a7d0ed311c9c41b29fbf9754a047597c6ec3ccc6df7f7c090d7d7c6133749c. 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/QZDA72103354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24aed8235ac033c19707ddeba18165250d662b568ebb140b855275a95786b9a. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USKRS2479802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e8024b9524e32825a119f9ccee713058d395bf307aa4b18e4dbfe2b86b4405. 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/USKRS2479803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dcce98769c21c61411a468a65b30ed8ee5af3e637e6795eaa1db9ed1ddd542. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USKRS2479804.