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 0xa72d8685c4d05aefd3fd61a7dceda6015c86952f71573fd4dedc7dd8203e2ae3. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35ce7419-218a-4a90-bf21-0be6b831f472.json and https://artists.proofprofile.net/proofs/artist/35ce7419-218a-4a90-bf21-0be6b831f472.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 0x0d3e8519a6ece9dafef599ac4439bc6f30498d364a14a334e25bce66396b2a29. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFG2508919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f6976c8ac30e988660b2c9fc3ade111707c212e675e563323109ebf0665b2f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:23Z), 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/QZWFG2508965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9919d033eba7452bcb1003387507b2e9ce9ccda1f7e49217ed0494494379c6. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:32:30Z), 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/QZWFN2568732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb403a075e6bba4a531da5912d45f96eee2cbc5b86564ec721bef2c56b6905bd3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:40:58Z), 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/QZWFQ2512895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe966e8968360cdeb6aefa5970bc2ec0f10ed5328d7e487dafcfb20849a810a5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:42Z), 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/QZWFQ2512919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b8a9d58db4af9cb4c60db61cfa2a3523a3960e1f758f692ba9e03f4b9ec34d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:40:24Z), 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/QZWFQ2512921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d3fe0e450fc17fe9be17fc8c297be5365227a1056e2255f8a2db9f5b926078. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZWFW2573372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e0ca5f5d1f57b8a76a25f5a28bac1ab2a8088c7fd504f1c797710acc7ecaea. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFX2516875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8196ac011e44dca6b2595c4f7c9f033a19148ef2db2c54c5a5dfb2912856da. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ7M2513940.
Eleven Eleven Hold The Line Veterans Day Tribute