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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c93fc6cff5dce9d0cd4ed8f4f41b370e77d817a57dcce2ad0ebb0b5b0cdd39. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c38c6e96-e1fe-4a67-ad27-27025cccecb4.json and https://artists.proofprofile.net/proofs/artist/c38c6e96-e1fe-4a67-ad27-27025cccecb4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad67a1c568098f8315ec0bceff514ff5d3eb07f0a3ad00938f2386c3b28cb66f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:32:59Z), 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/JP92N2308653.
今夜、逢いに行く（音楽と言葉の中へ）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a212c5ff227bb5a3d16c8969c18798d749816ff19bb2c692e59edb7c608e132. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JP92N2356646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66be4add8c622ed55bf91e3be8c36aa36a47076be295406813fc4dee88a647c9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:02:41Z), 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/JP92N2411098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4297de33f5918e0546c85312d4d043c6748824fc1185426ac8a9b4b13fc563. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/JP92N2421393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5428462580776f96deff2b2a4748c5d552c0c0112860572dfbf9df6d3971fa5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JP92N2429679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec3f9a8dc845a3b8126b50984e072a3b4235ca08bdcdd7c554810678a87d91b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:24:17Z), 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/JP92N2452398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910a251ae6b46dbb11d6159a9c87a5db2706b8b05550faaf2633e7d2ad15aa7e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:31Z), 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/JP92N2507439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eda2e4ae2711e15c552056df97b5ef8b636fe2d708216ad9ac052db8055228. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/JP92N2523891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16eb94159a80bcb50913d5d5fc0372b9fb9ab05d40919280455e019be79b2dd. 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/JP92N2541143.