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 0xb6b12d62eb9add8d58416ab6a01b8669ebe52ee70fc483b0635b340264e7e998. 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/0b6dee42-b43b-4a30-9c9f-2f6fbef9b132.json and https://artists.proofprofile.net/proofs/artist/0b6dee42-b43b-4a30-9c9f-2f6fbef9b132.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 0x6d295991d7f0aaee63c09c87f1d266ea860dbc6d7b46a7904c8ec631d21ad2d3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES62543708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883646d808d6da633d907edc6d0ffaec328e12701bf5b057215b3475a0fde19a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72596969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a021db2b97f42e25fbe1ea6a41603216f49868a4ab888f4e87e2de82cd918e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72533544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eac8ab96564a1df30ecdfc4f8f64724fa3597895689bef11e1f06c09ea1668e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN52506226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050868d0c5a9c54f8601fd415c3c3a25e1dd04aba5e93e8ef82967c087d09ef1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52506229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f586b10a9f77a35c260a7fa0e7c583beda909952b6c15d89e117aaf9a5c1a6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52506231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba006cc203a7b2e68b0b5ab51f9d0ba54ff12cecdabe1cac1d2577395a230ce. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52506234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9611facbcd1a54f22c8e34fa58df8ff772665a29cabf9f9aa2a112f86ee278. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN52506236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4ba0b70026f2daa118e392a96c7ae21b0b27c7c7f957259b5ca9b0df892760. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN52506237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab437b95ee4f6fc413df37a16444494242143f0e9362514945e04c21f56a6ce3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52506238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ccf42a9c6d277fbafa03b9da816c9150b097f79ed637fbe30d8caf9e0e780f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52506243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031f65b3389361d5681c002727758dbdc5e721e9e83a768dd4e15a914299de18. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52506245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff23ccd4a35b1878e47a83a4a4bfdf5d199788e8f7d8a38bfde7b5b2d40b67. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNA2538203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cd2dcab0f219cfd9c1cfaa5ab20d2802f2596f5653e732d098d100ff10f1a6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNA2538205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f699e32dd183588ac191dbc041d63b932e680fc7b4a59ef0a508b0745de1dde. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNA2538210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d48fac0742c5f34c8cf09c97b8cd0d29b68718e760cf6778d81f4e550273e12. 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/QZHNA2538211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a173b2855c7e6541844f22b04490da7cdf55f9c746657d0294393d1a8d07e8e. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZHNA2538218.