thumb|250px|Protagonists of popular franchises mostly of the late 1970s (from back to front, left to right): Ultraman Joneus (Ultra Series), Battle Fever J (Super Sentai), Kamen Rider Stronger and Ka
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47cf56b6342542211d23d42261bb27e89db3014359a0ffa3b78e703f8595203. 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/fe840f3c-69da-4f96-ad0c-296c37b874d1.json and https://artists.proofprofile.net/proofs/artist/fe840f3c-69da-4f96-ad0c-296c37b874d1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4bc231c48a98c0c04ff2f5c691a3e0871d939e3b906d252a2d2ef02e1d76ae. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/JPTK09908420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b201ba61e3bf8b0a91aea1ec3a5670522bfaf65dcfa5f3d0438ab060272b072. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPTK09908990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271d60740eef8c39d124adbae432e51579dff02ee00b09c69b4dd5ad18950054. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPKI01113620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948e7d5d26c4ff60c26e1819d61a79b506fe1de9a8362d3e6f5ed30f99a4b234. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/JPKI01113622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438bbaf7e42bb94ea4fd351a3ef4f82efbd73efa89ebaa92fe98048a77fc20f4. 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/JPKI01113628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7a5f563c8acc6c00c62f3a20dbd5b0c199efd7ad72e01ba1a0db1cb2608dbe. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/JPKI01113632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81f4590643643baf0b82e8888eaf4689291f51514ca6a3a020935f95d0d95c4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPTK00104360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce28dee68fe6408b8062501c45b3cadeaf1158ffab4253fd937e5e3d7d22a694. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/JPTK00105380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1382f4d0aaf3c6436ec580a5c02287fef3622bac8df79085c7ac93c88551ef3a. 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/JPTK00003580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba30b6b466ad21d0a6b5f1dcf7b9326217cee3350ee20d2fc50f7060093e5e70. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPTK00003950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce28dee68fe6408b8062501c45b3cadeaf1158ffab4253fd937e5e3d7d22a694. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPTK00105380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac98f78aad7503bde1d5c0436d0e58bbcf7be338a4b1e55d9555a763f94645f0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPKI01610002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1d4f75b824909ea37837f4add40237112cd7426923efa587268147c9b99cf2. 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/JPTK01706160.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfbf9ff2c76eb0e93a2674f1a2777a04b7cef470da95c291cf7ec2fdc9a00d5. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/JPKI02411455.