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 0x217789b19c41f6c9ff5484f320b2090c3a3c7db012b655c9be6d68908fbaa915. 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/4edb7f43-fff7-481e-b318-1861ac2f0df6.json and https://artists.proofprofile.net/proofs/artist/4edb7f43-fff7-481e-b318-1861ac2f0df6.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 0x8cfc50d0c6c20375fd880b57e880e2b3a69fda244ae389dd8496e9acbe55e5e3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX7852400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b7e26ae090b83a24338cb2f4ca5ad6c4c49c61f1e10643b5ad9fcc11569a1c. 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/QZMHP2073290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d907dd1e582c98a81aab6e30578c3f430c2ffd223700f27f74f9599963afa52. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZMHK2236282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74b3d54f9cafb3ad189dc2757aa0930fd39eee80fecf000dc7a1cd0a8b8da68. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMHL2273560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ce8e0594deea0427cc80e996d31e24d50b00ba8939a0b54f4da0a8196190af. 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/QZKDK2288049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ab3f1e633cccfbd0773b52c3dc105473007b5b769c4c16130e201b29dfe929. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:21:13Z), 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/QZS632352694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d5ee1bb727dd9a4c9d12cfcf23f13d27ae1ef717be1fbcc06d50d2313b8173. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GX7852200345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cf256dafbba1ba4cdca77702aa0d81c93c38b86d525e11dc88f4c0f9da26df. 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/GX7852300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e1f575c4ecdbca0e4408e58a6814c2a6b880d2237ad8caf98b1d479feb8534. 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/GX7852400443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd2b0779173b30dfd1c7eb867c9a3d374ca6f611dd1187440fc8f616f5d36c5. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:28:40Z), 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/DEUD42442363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c29e8edefec67015e0a46f2ceba6d3d44b67529386afbbb98b038395a2a7cd2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX7852401437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3143e404d9cbf2a0eb3ee58ed46d794ef0f5c6a84a9b0b3513c248df7b5b66. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEUD42560556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b3c6f0736f7fca6c06b8ea155508eb29a4747954dc818a9e0f2e447716fce7. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEUD42568182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5807576fd4536d6417011f1ee8937c7e2606bd5cc1ec4f904826dd6936994bb8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:57:45Z), 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/GX7852500964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4517a95053fd175c0cc37b4c3049d73756c1b8d295f64f22066a542b441ac6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:53:22Z), 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/GX7852500965.