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 0xcf5c8e386cb6df1e7641125b2238039285b030b2c9555b0cc271ad58cd74f7ed. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26ed1367-4638-4a23-8a5b-8d8a6a67cd1b.json and https://artists.proofprofile.net/proofs/artist/26ed1367-4638-4a23-8a5b-8d8a6a67cd1b.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 0x41ed10b16b6e867bcdf436d4f2b9b1dc06f0f9d14f486b2c6d5ce8ce0bd2f867. 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/JPA652306377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48ac2d29b1950bf30061fde6fbaebf894727cc790c3c1e68aabcc97533ee788. 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/JPU902304778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc73bef8fb1e4d729e8670db5d92e0b0c29ccd3b7fb1d8ce49729d5d8213cff2. 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/JPCO02224330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5876503639d45a681d3d10be45c5f876f8e4c8ca589d42e0c20623e31532774. 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/JPY392401766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33432cb032078426c49ce00f6c73633964776d73b1d136aff43ac5c3903174eb. 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/JPY392401767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91b2cf04c0cf6b838dc4ab2be6980338e33ca4c4da3a27a23d9cb1a3a7e4170. 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/JPY392401768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e9ae4d3d0f005b7c418cfa25cd105570f9fbd0c24899731eb46afee9166b68. 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/JPY392401769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce89f612acf548134c98d485a1b5d14b8bbf84f88065e2d103ea13c429c799e. 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/JPY392401770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62695d769ed8398d2264051d90731279f6c25ebbab287b3a00889c3e522a19c7. 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/JPY392401771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f465ad0faad5f4738f1a178bfbf16f770d99c4477f725fa1748a9edd750733. 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/JPY392401772.
それを世界と言うんだね - ど〜ぱみん Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75eb2f555900037a8f945bc19790cd43858970e7d14d6ad4162e7d87b45291d9. 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/JPY392401773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d94337cdaf1a84d42b84413646d74d0790c0c7cd5de4cfdc8d34272fe388a79. 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/JPY392401774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2b930892f2f8336aff0aff6d7248ea2f6b0ad2a3620e889974d889821daa6b. 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/JPY392401775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6aec55b6e850ebb801d98162bcabc8638f5e511ac6ed65fb83c1cef6a676fe. 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/JPY392401776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579a124e1edb2480660e6dfca57d574c525f5d35dbf4070f42fca763690a92b2. 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/JPY392401777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d97e0c627d45ae5b3b1a5274d9a89433e82f2b0cbe3923add57b975b822b12. 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/JPY392401778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a1954eb7276e29cb568b811f9046c1f1a39cf9aa873c026e0156bf2b1c3a13. 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/JPY392402534.