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 0x0d22348ff197543d3b2636a7a1c56c59462702110c49365d8672a66a9387bf66. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b048a49-7347-42dd-95ff-b3ddd51a65b6.json and https://artists.proofprofile.net/proofs/artist/7b048a49-7347-42dd-95ff-b3ddd51a65b6.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 0xc0ab0f10e5b1205fffe7f3702c87258a28bb250aa0caf720d3b50a78ff339cb3. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZDA61982099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06af13f53f3eea9e4fc6f1ea1806a537f39e213d19ef391302cc539b47001cf9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ42186657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14f4aae173cb6e03f79571838e795dfbfe3744c6efbc962205f8fd79a6dcb70. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ42186658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052c75c467e83368536b09bb5c4c218c89c411e9f797da09bc4ce38593b3ec31. 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/QZFZ42186659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531547a8abce4ce29fd2bbc9dc5559a0441690352a931fdffa87eff6d52038ae. 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/QZFZ42186660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e813bb4cf4f954ed9857b0ee399b869907279f286dfcd7a249b7d5f4bd6bb7. 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/QZES62164044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cf06639a338f64e59398d3db868a8ee37a54197dc8384b6608a1b84bb3997c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:38Z), 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/QZTB82221913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621ab6619a5aaab1ab362ec0924ba656f14b108fc0f58338eef0afdb2e4330e3. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6N2521283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a5ce6c11741bf0b7df86c4c80b1adc2cded63aa1ab5b9e59329b273889a6ae. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:46:59Z), 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/QZWFG2529793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7e264ea811f5c86af87ab5d3be7fbcd35443e82e9d5dac01412325bb654895. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7N2505978.