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 0xe7d5e3f782a3ef4f5e076acd0ca8fd38a8b19c68892bac06caab4062e292aefd. 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/6deae8cb-220e-4fd6-9ead-d6df25afc7ec.json and https://artists.proofprofile.net/proofs/artist/6deae8cb-220e-4fd6-9ead-d6df25afc7ec.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 0xe1bbd68de432257e6f03cf292a78d1df5aa56f9115d9227283d9970cb181fe03. 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/JPR292400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3b7a9070b2e24b5e64644d992a42a3c238389b6a9d3bd26e3125c67b9385a8. 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/JPVP01701705.
落花枝に帰らず破鏡再び照らさず
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099e6e655c6c170d270c447deb2651b7bb58f9667bbfee4e857fa014214a1e95. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPVP01701711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce09de4904e236166c7b3951747b43878887f7628a0f524db9b778ac2ccc5c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPVI01127720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e1e4a26c6d69b3fa4af132b4c12b764413154ded7b101c08150bc3940b81d2. 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/JPVI01122810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41736d03121cf1f439089dbfd6eec4cee10833b76c1ac08bd8aae7a58ad0fbab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPVI01127740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3239c14e58dce0118f0a3de230afd379e6d870d8551699ac3bc96e55c72ffe9a. 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/JPVI00926740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62de3fda844d9a4a41af2f013310c41fa62b8b55b0c0a9a937a5a41de0a64260. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPVI00926760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222ddeff5038fe0f9ae3ae6257c45da7451417939de1240dbffee3677ba3fa0d. 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/JPVI00926770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e2c3a334cc142c56e0a3838c28923b76969259b8d912496681be537112b74a. 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/JPVI00926800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3338a9e5dccd4445ab7182beaa9b5bed7e35cf1e820af3d84ef67cfd9782bb. 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/TCJPT2259478.
Kusatta Lemon/Soshite Dare mo Inakunatta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe283799d7c50162bd808f4750080528b129c783f3db9c817b2cac9ea35f26c77. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:52:20Z), 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/JPVI01902527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5f12757e86cb36ba78ac43e304cb2df69a5ae35a8959035afbfcc60efddef9. 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/JPVI01902528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2241b6e565f61cadfc786541f8d4f185e636f370e24e4ce6b70aaf6c0c7f9028. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPVI01902529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd802fe21fa42db4ae9c73ebe4e6ad153559c95ed1dc55a660eae376f659e6d9d. 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/JPVI01003720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dad6b30d3cee511904f4b34dedefb36950c4996d2612f18bb4b858c48700d5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPR292400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f36fc622a9993f08d2be8399c70bdc357aa7870632868bb2931cd0cd6beec. 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/JPR292400352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994434fb4df4f3c0ce0f59b6b66cdc21bf20b76d4baa05f93a6579dff7159a9f. 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/JPR292400354.