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 0x9046a68a81f85c7a5eff113eb161fe19508ed482e737988b528baa8d90fb11ad. 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/4e6782f1-cbfe-4b7d-9209-de0b7511ee5c.json and https://artists.proofprofile.net/proofs/artist/4e6782f1-cbfe-4b7d-9209-de0b7511ee5c.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 0x1c6352b29973019fdc6a2e8a7c6d72c612d68e22796c220cc8556609db4a2f7e. 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/USA2P2103756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314ad14eaddf9215f7b201b3ed839ddc5e6177e5d72f31073b1afa7463c57792. 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/USA2P2103757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1917ba2d5514c8adfe4252cecdab00212a8680ff3f9e1ef5858fb1853c70bd97. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USA2P2103755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b1d350d14c87d9c291e243b16aaa52476741a883929b154c005702f10cc82a. 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/USA2P1956008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98829f66005788c873be96115ad3159968767a3ad1819f1a6baf63abe4be34da. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA2P1956009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86af42bc325c56d616178006b8ac37246eedf6c97360d14799644df543d8c5e. 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/USA2P1956013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b79024e0ceb5e8b15f4a5fca6d01d952f2f2991d5e8504594ae9b4c20b4311. 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/USA2P1956011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e633fdf2c9421c5cdaf94b42cd5b49a7d8d6b57658e9cd57aad85ea5feab33. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:42:12Z), 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/UK6821648772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e06cbd73e3f5f54998ec2f2503f9f30c320f0ae3e954f5b77b45bd23e47b9db. 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/USA2P1696316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ab52c612643809d5b36dddfe8e8e6e164ac57f195f870dfcf3f2bce027f8ca. 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/USA2P1696317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aada7d7d19922a63de55c0c2647b5da02c5abcd7b8f435280e52a416af8c62. 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/USA2P1696318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e7ef7740fe034b18a7d9c096dd9471a8735a4bda8415f4214532586198a273. 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/FR59R1604292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed6efb0821a55a6078ecb3e271bdd810eb19a5444ec72d2d79223e625bc2257. 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/FR59R1604294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdfa8045e13a93b32f0c99a8d4748a354eb06b7edf96d228e41206fc60dc241. 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/FR59R1604295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056674762f632b4c2bd7e51d30efc166f41aaa8eb47f3e78aa5ec9d2b1ea002f. 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/USA2P1542784.
Looping Around the Forest I Thought I Remembered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a7a907c1b7576e599a1adf6d88d8731f7b84b69e2d2bb7139d8d05d648e74d. 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/USA2P1394325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176affcc926081eab814d77d263820a62f52a3ef3b395333c63344e6c4b5c61e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:51Z), 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/USA2P1394326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1011bc8d947c9698779a50c7f8335392d2523c721c0ce4eb465f828598938a. 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/USA2P1394327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60a02d6a7f48d814156756b6b7fe9685ffa29fe392749f89682829b05b0f849. 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/USA2P1394328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc422c25548266a5a6261703e5dead3b029a9eae80553c1f811286972e0b901e. 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/USA2P1394329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2018050763b8ff1e77015864bd1a7e350493ddf109545788eb9f3cf42e0972. 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/DEBL61152063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df3ab4e5f8b820e9d6db781dbdb0b0106f3ae8e5416df13b796c5ffb80fc272. 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/DEBL61152064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24f1d6b7f3ae71676745b75763d2c5cd13444ea11b0bcde480b36d167465951. 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/DEBL61152065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fdc8e19a9cd3f2f3c37791a1f75f21dc59be39d93fa49f005df39cf01acbce. 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/DEBL61152066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f306059aa61393b54c53b16ceae058e1df63c62e8decd55428fffc6076c187. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:23:08Z), 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/DEBL61152067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3f44607b9293b14bb02d05eb2551168170f209c6c11b60e022bc6feccdcda0. 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/UK6821908328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7642b0b00acb1c8f49d926229b6a6fe4b3a84c0cc8c2b1ef5e0b5c0687c54e. 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/UK6821908329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ea0ac326600af45e850c893c4d6dc2c267c5eb14fe26865b931ac42ca094de. 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/UK6821817683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9ae013db259cb5b706b5fb9f0eb5f0e279abd07311e3d63a2b207eabb489f5. 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/UK6821817633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02f7cf2269c0ce99be5d3ca5c681a9fda676c7049b0c3b80612422425a91897. 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/UKKTD1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6470e16d37b90f9e3849e657849b7bf4381ef671a9a6cc1ae58ea4a3cde90886. 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/QMDA71484938.
つねひごと・WAVE ～あなたが世界を鳴らしている
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5064c943bc3e82527975c97ec9ae914a4e3b2b79bc91f8262d1451faf40731cd. 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/JPS801954026.