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 0x48095b0befbb23fd0e6fe6dc7fea7be362decb9a7539aeb1780607330ed7ecaa. 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/1fbf80b7-a60e-4fd0-a976-f1b1ca8fa9af.json and https://artists.proofprofile.net/proofs/artist/1fbf80b7-a60e-4fd0-a976-f1b1ca8fa9af.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 0x513119a82154692f0db6f9d1faf38ae70ae198f1dc1c9809131de71116875e88. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/JPA651804039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6071d7743d7f36209e869c0ac81a596526bc115d66942d3cd58241b2e0dcd9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/JPA651804037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd38a8c74f1e3048a6e559b18994c062ee934eed728340e92c196e2ca05e1b5. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/JPA652005163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fdb44ff2df262894d95396c2fc4bbc1558c9000f1acfa421b544751e244001. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPA652005164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068c0f9274f2d176293d73f5556414bfb1d5d4346decfd49ac9cf4712f679906. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPA651804034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5593116e3f7f9ce4c10bb32d9a3b64ec4a1291399f0bd7b59bd567f94defe5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPA652005165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd061d25a72c02977af62fa4dd1716bea04ba02070556a3ba986261e897d5a507. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/JPA651804040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee00e16fd568de88ee55f3bbace41cdd143f79ead0cf211a8862f7e80a221605. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/JPX562000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6160212e77d7e69ae4f77226c1c1970ed0857b9df5a782cef62ff831b2d4865. 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/JP92U2400769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec4ef067a2ec0aea3e5f25ab01559bc114e82eeb8f4b694c2128b0e836b9ebd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JP92V2500155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef780dd69f5d24396c480cb05023c115e26ffeec475a154040f525165dbcec5. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JP92U2500364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef780dd69f5d24396c480cb05023c115e26ffeec475a154040f525165dbcec5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JP92U2500364.
音楽的同位体 星界 1st COMPILATION ALBUM メタファー (vol.1 詩想のメタファー)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c56c0eb145ab32910c705aaf6e1d36466b5d214e23efbbcfc6868fe8988424. 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/JPY392200447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a806f8369755e6075d43842ceb023c3248623c6bb43adf12cef391fd596e03. 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/JP92Q2302036.
音楽的同位体 裏命 1st COMPILATION ALBUM パラノーマル (vol.1 残響のパラノーマル)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3356981163f734dcb575455193e44940192f42c2ca36c4248d36bd68cd05f552. 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/JPY392200560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a0c883ed8e42295709d45f0cc1b48683e65ea0678222fcfabf1f5ec9b0fcfc. 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/JPT362000007.