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 0xc1f08d14e2606c64a107947863672b99c7d76623fbf9655382583586f4e3e8a6. 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/6de42bcf-8245-4edb-bf96-f41cb9b798ee.json and https://artists.proofprofile.net/proofs/artist/6de42bcf-8245-4edb-bf96-f41cb9b798ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Isabella's Lullaby - The Promised Neverland (Lofi Remix)
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 0xa8e1bb8ff58ee56f5a429e79371747b5c10f42442af8f5940fa0d3671ee4af8c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/US3DF2297611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5574935ee28ad38bbd00b7f5820ee41dd110b83ad7b6ef59e1a993348375607d. 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/US3DF2297615.
Saitama's Theme (Ballad Version) - One Punch Man (Lofi Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faae9e0f77c41905adbe085a483fbf3d04c3aa282133a8111f2c870bdd1c3b0. 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/US3DF2297617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5b3a5551e73d3b8a7093ffe2fc1a56df4e5cf724a7a156c2f00916b82b3de1. 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/US3DF2297621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4b4bed84a44c9eed61a3f804c510e24dc230ba249955d68ed1a476db8b2727. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US3DF2297622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004e424fa6a955ce43d097ab54f2facb56555c40ca9c45572bfecd07d7e3b730. 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/QZNWR2252186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5397adb5f66759a9b34178ebd825fa5b1709cd4758912faa27e233682858d669. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USANG2228504.
Mitsuha's Theme - Your Name (Lofi Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7712afcd31895aebe44356bfda0d7692bb9fde1e41cf1436086ca94ef3d68a16. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USANG2228505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7f2af2c2968bd3dcc70a5e2aff70390392bb43b5c1ce6141c97119f8245f92. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USANG2228506.
Itomori High School - Your Name (Lofi Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eeab3edd9a833f9316f3efec8bf7057c447dd946add114e159e2691b311bba. 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/USANG2228507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107a7b5c4615316d54110a7c85a4010ce8426a2e70ce57073ea5590aafd251fd. 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/USANG2228509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c0731254df2c7d3e9a643d7f2f1605f812b4eb706ba5759bf9667ed0db288e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USANG2228510.
Chainsaw Man but its lofi album (by Jembei)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27678a6865a4f76b7e292e45244b5135287d7617cfed647cf5b1bc6e8939c338. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USANG2246942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1052c5c16c497a5c16a317885a51ccef1909e6b0f222f965d88ac1eb6f355ebd. 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/USANG2246940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804d7acaa5e5cf34487672b0f81b63fb54d991f88a4fc3137b26ae709f759bb5. 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/USANG2263974.
In The Backroom - Chainsaw Man (Lofi Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0301d69aa1185ee72b3f9733b851cd68ceba04f973c67e2aadb735b764a2cc. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USANG2234813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a075528c55e38551f262adf0760618e0ac653104b59c9d0e967827ad2cca3b. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/USANG2234811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb8b662c106a9254dec3c8fc6d2ea97da23e73f6ae3cc2c364000e728080db4. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USANG2226802.
Chu, Tayousei. - Chainsaw Man (Lofi Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c27fb715fb1e08cccc0f722a4575fcc59d1505c430f75c344695afb6062b9b8. 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/USANG2263975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd05bb1ffbd15e75008646973d8e74f21bebf208ad1504816c6d9d065be0585. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USANG2242736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b8ed6d5aed45dd065224219dfcc67547e8513d0eff7df60c0fe223fd171016. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USANG2242735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86faca6ca16df44fe21c3aa01a65e0eaf3e878cb86935ca2a724a3d2ef7d7790. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2417340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1983426dd26e6dac075ccc2ffb6c5bc4750305d49c84439def797f6bf98b8fb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2417341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6551270079bfb5d64c68f69ce82d8be1316d400f63226576f75f737ef9f9fd2. 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/USANG2242961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54c2db4d45c41b0c882232137a9b081c23daf00f917342922be060507ec33d0. 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/USANG2226803.