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 0x44709d787b6c135a6d761eaca9894cb74923a47c3771c9bbde3d161b27909a48. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/687fe466-0440-412b-beee-8d9ff5bd2579.json and https://artists.proofprofile.net/proofs/artist/687fe466-0440-412b-beee-8d9ff5bd2579.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Christmas Chorus Musix (Defoko Animegirl EDM Mix)
Last Summer Love (Vocaloid Vtuber Version)
涙に濡れた君は美しすぎた (feat.初音ミク)
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 0x47ccebdce2d7005f6914329b7858975a58b4cd288b555a2ab68970a188e112f3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPW462354489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbcd8f4028d0106a550e4b69d6e1ae0bbfd0a0115ac6a26cb42668fbc3990bf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPW462354490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56b94f038a26f68133f16f4b1b58e8d426ab516ed33920b409f464a2834344c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPW462354491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277da768e1953b150c20e47f421573e6ae28dde236ed521a7c770c9d03c3c107. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPW462354492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd218eb905874f62000d00c48d13a8e36ac2a2b32b663fc7a0a92123a494d2915. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPW462380823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4930eabc98a81ee75e54dca866e7fa231cea627c1b553f00ee34bdbe2c23d64. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPW462382383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18938b14862499f354d6f88640b3d7cad87e23338bf195a4e78b87a1bf63b7b6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPW462379858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2191e5308dbc410b54d092d3a532b18a0f46c3968c28b1289da81ab772bc0ba. 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/JPW462433315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5d352cbadf7791fafdcc0c4527fbb98b2f9ab5e0fb3e5c11f82625d852ecf5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPW462469051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a99e17a77a7d1f0bad92d65bfebd51ef054057356bb31b64924d4cc51e891f2. 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/JPW462434471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78127449e8a430122607b0e8844f48c3fb09273daebad13e0fb24895cb1c8ce. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:38:54Z), 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/JPW462437260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a94e2c35c29255487fab3932030df2e91832076076bfe39385872358dd304eb. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/JPW462550957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4930eabc98a81ee75e54dca866e7fa231cea627c1b553f00ee34bdbe2c23d64. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPW462382383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d38172a9ea9b130f781560c301d11fa7de9fa9fd21104d4d9fdf84b20794131. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:41:22Z), 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/JPW462381404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3784082f33e2531ef9f6446b3bfeaca5634d702a085d1e6a2f14c969f400e7e6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:48Z), 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/JPW462414582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef2ae5e4b1ebb32abaef2b3403b6d45a27b3b57f54f8a284ad352fb20fcde21. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:01:18Z), 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/JPW462371063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760fb6fc61a8b16127749d3baae351467ee51ef7e8665a6fcd39c78f5f395640. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPW462587694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a78e02396c806dd0d61530c3daebd3b8707812b648b10fc851e0e88357617b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JP92W2501121.