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 0x452b2b37b7002b0614bd8659ff12c0ff73b228ee5abc96ca716e9682625469f5. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/544df218-7a43-4c21-9b95-e0739b33c128.json and https://artists.proofprofile.net/proofs/artist/544df218-7a43-4c21-9b95-e0739b33c128.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 0x2c6a70960689aca9a5a7de9cdb53a2e13db3688e6aa20863e634fb99b258f4d5. 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/JPB621800724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a7c0125648f1816a5deff351ac600482b59409a608f904b83d1c9f4e65d7a2. 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/JPB621800725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa69546f573317d819b0c7c2e99aa316115c58b13d10f52673ec8f0e5f00b01d. 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/JPB621800726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44a05c8fd4e24e6046dc3c159d10a8ed1896bf7ed34166df6a9090f1a95ddd5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPB621800728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ede53b7e5677cc180cd602fdd2d05c992f77f5668c9296e4df0be771e645a2. 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/JPB621800733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd368dc7e50c55b53d2af0050377acfb421982898ba2b6f74c1886df3d2911938. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPP521310002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1449c1365860e2ea7d6141c6992b492dabdfcbbfa1493de37a7354a5bd646992. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPP521310005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19897e8cee64412423c3cf6dd7a2829f96d7a462fd9a79f2a4294db91e00b2a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPP521310007.
Shinichiro Yokota Presents Do It Again and Again
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c56fddcc82a3406a3114e5b1fd57753a161b113f04cdb6a41e19ed837e1d21. 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/JPZ921611442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf456b7b96871818f6472f0488b02c279e873c0625a1253f40e653f2690489b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPZ921611443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e01739ac5abec06acf00e87bc2cfdad364f0161ca882249cc584367117dc7c3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921611444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfef4a92758a2410b68449620c49233bbc09157d0247f3d1f110876addffc43f. 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/JPZ921611445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e51b37c561d3ed08641240fd2d137a9d5492792ed36f2c6023cf98354df64b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921611446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750d7f7ad7d3876b1b17d0d01809454b89c421589af78247dd298505e56d0724. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPZ921611447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf356822ec7617ef94124cf39d8dc728448a08480f7b1fc139b489a427b86e3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921611448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521df6acec630e4b40b59cb1cf7da6ae22b7a17d00c11714e3eb37070f0329e2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPZ921611449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0011c862bb2b1077574bce3802615592f32dfc86fc73d6a3740823ca488ac374. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPZ921611450.
Sora - Sky Magic - Shinichiro Yokota Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b899f4635cb0b79bdfa403ac445c8c7e3ec974fdd9fabb192d6bf38eafe637. 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/JPZ921611451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ec884e36766802a94ce3e274850ef3f5db5610c8b4d1185cac1b6e349b1010. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921611452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1744d36ba615a27c33104bf91fd7ff757f89a33083962ead44b565ad0df09447. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPZ921611453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11db5ce7462620313dba9511acebe24debfae917dfca3037cfc4141f985f763. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPZ921611454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26deb368e0d54690a5bb4c24dc01b04375839ebf9bef3653565fcc21cc185cc2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPZ921611455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604c17adc843f31b80b6ff7f38eb847b0b0cc87a7989083e9a8574329e9fc7e0. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USQ3W2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed93d7a1d4807e33e50ce15a853dddb8df5820b42f8d4409a9075eeaa7ac9cc7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USQ3W2100002.
Calum's Road / The Hut on Staffin Island / Duck River
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b0f27a9c95e97f2854fbefd19bb45dbd4a4374e52c046b0684c907a540a8d8. 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/USQ3W2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58212c0f6f0872d45bac05620954392ec7102d0001670eb362b4af20e1aa453. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USQ3W2100004.
Musical Priest / Toss the Feathers / Lucy Campbell's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f759c4205050be3d604b4207e831f63173f53b71f183e5e360bd87248e26dee. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USQ3W2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5326636699262a4f54d852922a30b7ad1a032d146f0be2b60f329cf3a456652. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USQ3W2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1cadd6a539172f47720e648063e42a038fd2ad8e51198ffffd5689d677222e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USQ3W2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa780aaa568005b749118a946d824d20df0d95815b4d0e82b7d2b253bc9d87e07. 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/USQ3W2100013.
津軽三味線 小山貢民謡集 第十二集
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f042767eac0ef3f23d90b331542981f3dab21c51f94190b338500e7663072e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPS321301158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58d2ac9a038dbbb61520014e0c9479516815c95a7405a5e2e73350ddc993346. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/JPS321301178.
禅奏 - Prelude to ZEN (Binaural Live Recording ver.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031a32412235f06e7a9bd5d4b47f4b94a3f9939a1771c9471ea10b659e77354b. 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/TCJPD2593244.