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 0xbe222fbef63acf5ff0ca9e0765035882b055ede65b1f1d7c79035c13983ef7ee. 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/86061b93-fb56-49fc-a401-89e8d50db247.json and https://artists.proofprofile.net/proofs/artist/86061b93-fb56-49fc-a401-89e8d50db247.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 0xe7056eff2d427a26ee811d85e2b7c8998292b5a5810ae1f3d8187020417da7a6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:21:32Z), 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/JPPO01142480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e68ce4502f5c5d86f31f71d998dc22630ded13a25847f7cb573490cd7a2f31. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:12Z), 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/JPPO01142481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb68671949afcfc18e9d2ebdce9be4a123b7212128c5063757de9f807acbd687. 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/JPPO01142483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c83c650087996ebabe555503657a31742b045938765bcaa13fa269dd27b35f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/JPPO01142484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180d695624a9e6189d3e3d624a9ae795ab4d064a3c1074ad1bb421c8f0d0add3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:57:25Z), 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/JPPO01142485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0b4bf41eeafa3bf6cec2de4b88403e40e74f2435f29c4289516d472f8521fd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPPO01142487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d6a5074e35f3237251ca9679c499c2b5ef777eb2aaa057afe9755cfd1d33b4. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/JPPO01142489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fecb21d455d2c26f7e6d4263e57d89571f1909bf60b9e4ebb81a612b5fe9e1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:21Z), 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/JPPO01142491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9677174f67b5c7de21d9006d3442ba817d6100943cdc89503e18986cd1a337. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPPO01142492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e511ddbc182ae1bf5be6c1795e45bc7d2520754cf6580ab050507ab3dd3fe8. 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/JPPO01142493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0fda848760488d1c5138589b18e82969d6fe8ee56f8ae57a59bdcc5355cbf4. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPPO01142494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b9da6a695572791bcc46ea7e224de86037001fb854e8093db03718f8acb738. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/JPPO01142497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db8270eff92f5215f0369585813a4a207cc4030687d427f090a69f26f1e83ac. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/JPPO01142498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dee8ad94d3ee9e1cddba7a9937615d4312adf1d537d5da63987f6646283412a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPPO01142499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8af66b020c363fedb1160d9c2f9c50c3d38bba4d1127faee0f5df0d8614606. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPPO01142500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa786876ffb6831b32548b90f8db12b9c1c5c53ca669d660b87e94aa4e6223556. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPPO01142501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69fc1ac2ba54736489ce9c858ad2cd03839715845cd5fbb2b6cfdee7bc09986. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPPO01142503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdda69126b7c5abac1e646b12f6ce1d10e45f6c8ce4f84059df87d4aa69df34. 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/JPPO01142504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac4fc9de08f2de125bc05b56b0304bf5007e1bb686fef2477eb088ba65aab3e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPPO01142505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b272382855c4dd9efaaa758fd00a14b8a551f03c861dab905c3fc3efeb26397. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/JPPO01142507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c67adce3eebf1afbb19c96a7e2e948d09f7b1cd4be4983b50e774a418900f31. 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/JPPO01142510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9ebfedf5ae57c95fb95b1da0a4e0488a01aab5dee7234e7cebbce1496d4cd6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPPO01142511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cf1a3f35f5931d2b38307668c59fbf42e37b32645500056b092806942f21eb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPPO01214331.
ホームラン競争 - 「実況パワフルプロ野球」より
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38f13611ea3c23a4b4777c0ba504b4ad1b2277127210b73d81b9a51ea8ed0d2. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:21Z), 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/JPPO01214332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3129e64cf815c648d20229b4fff2f010f1fef70e30ceecb16be6a934bd60e824. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:53:22Z), 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/JPPO01214333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dcac7b92a008f66f48568c819f9c2579377e105a0c636e6bf2f618549dd8f7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPPO01214335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefa60bfb50b28501638227648b8b35af3c86eecdf2956b6e9d58bdf16bfce59. 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/JPPO01214338.
全力の空へ - （千葉ロッテマリーンズ・清田育宏選手応援曲）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e67643625b37a192b4fa03e5a067e7116698c53ebd0d4f78d7751b663f6c67b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/JPPO01214341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d4fb59565c9a53ab2c6b3b5470153aefb38ca860baf6717af9be71b4f23230. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPPO01214342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120cff338ad771af6c0ddb59de5da5655f8ad73f9ef70a9cf630fb265e4c9694. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:17Z), 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/JPPO01214346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd020a7d5cbab8c6996886ddc15711f199920e6ed638e3506b920b4e780fba2b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPPO01214349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47c525fba808acaffcde87fce229587609922043259ae4b1b01d7bac683c898. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPPO01214353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6298d7cbd8798df8767d28755dc6472df07b4f75a760a6884c1dd720f057c5b5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPPO01214355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d2065005d4358e10de7a1db539656f94fcec2db8b52cde571acd3d35dc0082. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:13Z), 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/JPPO01214357.