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 0xf99e2d3626c25fc231a2d2b98025ec5b07a63012b72039c2029c97d82e5b4856. 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/c903bf01-2275-4964-9cdb-f5efe7ab752f.json and https://artists.proofprofile.net/proofs/artist/c903bf01-2275-4964-9cdb-f5efe7ab752f.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 0x7b2a32a6997b4c26fc1e789f80a5fb2477a884a8a650c8055d04b66cd044e7ba. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:20Z), 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/AEA0D1809292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe075451423b241dd9d92bc652b3e589afb421413c8936df05dbb07d64c748f77. 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/RUA1H1930535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c1cbabc98a43af510c34f5e688f2eb88ba3aac60d9e4e62c616e207b6b91b3. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:33:28Z), 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/RUA1H1930534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf597e9150caf05c04abe2ec149a8d3509c31edc962aba453d79f1529a40be683. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:01:07Z), 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/RUA1H1930539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3face37ebb65108b1addd686e3dd1cb2bcbc408124b99803f9be224ed985b865. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:45:20Z), 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/QZHZ52124702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59b3f863d0a4f4b2546c8deb66ea84845e0e112f817b745f7fa607d76d9cefe. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:01:05Z), 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/QZHZ52124701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd949e98dda15acccc7dcdb6fdf3c2cf1eae0be58bc6dbe409fa6e980ad44ece. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHZ52269979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ec7202f6847013e6b14791817365cf91dacf4f3e34afbe44fc56b558d2c9f8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ52269980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa21fc430b8aa04099af4f1b63a743f8b614cea964b6bc54744ef61ea0ef10e1. 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/QZHZ52269981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65697233a125a607b5e7e5129e0a6a1c7621a98e0640fb68046acd98dfd3651c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:54:24Z), 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/QZGLM2403604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1a814c5aea15983f6b4bd316fe5827ae12ba22e2686c8357f250767a2400ec. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNJX2483511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f284dbf9606db82b9e167f86fb1a1c9372f44cfe9914bea9540aba4d45513c7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZGLS2419599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738ac546996fa4622b59aef9f74fdc04c2f1fc7e6886f3613aac2251836f2e00. 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/QZL5N2569622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd49866d701773cbd121fe690f7f36e400b2e6917801890db958d3076efcc04f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZL5N2569623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070406737e13d06cf9ace526526b0b5bb01dd2880ff93ef832e40f7b05b2868e. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T10:58:50Z), 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/QZL5N2568408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e964531742b3e24a2202720a418820e3a70b49154c30d220979d1e794c82f5b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZL5N2569625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bb21fb9dd873d87afcd2360f5d96a01d6aac447781e2385890ed9bc1d6c8e7. 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/QZL5N2569626.