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 0x519f1f78e96c1a85cbc75c295b1fde9ad6d29baafbdcc78cb44325fa05597132. 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/3e705b52-8220-42b3-b7a8-ce1c4e017892.json and https://artists.proofprofile.net/proofs/artist/3e705b52-8220-42b3-b7a8-ce1c4e017892.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
せかいのはじまりのさいごのうた
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 0x505669b758b5419748190d66dae873991cd983c1d8825c5d1579de4e5c1211a2. 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/JPE561201317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e618cadd79524bcda1d29985ac4a71c197f93aad03dcfe12ae846d95124f22. 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/JPE561201318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc46b2703b72d225e3e54c090be298f9597782eb5df047819181b90cf670c5cc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPE561201321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b4ca900222e06a2a1469270f157e4d2cf6fa99b3b0d8d169e95d4a574d146c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPE561202646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33040c9f7fe7179a16f8c34eb827c321093b4681eee1885675d69d935f727aba. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/JPE561600462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb69f661123ac3f8271184efd0dbc974aefdf12565f6eadaf0dacc649203e70. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/JPE561600464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7427cfe4cb40380779b93762f6d10eba974a7ebd4a39a5bbbdd162b04a6c16ba. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPE561600470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea12fa0474ccef9bb4473398a523b50d0599e2952f2facf23376facb66a367f4. 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/JPE561600471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938df175a9d3c70e3258feb06756bb7497a45560fc0fdb7338e896a9ec33f9d6. 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/JPE561600472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fae71f2aa8c3084c6851c8fa8ee0b32449142c9f39bea2ccab4d638cc06ba7. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/JPE561601652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d00a1f73543b215b13ef08fc8a1f377ac75028c0e48ad8062dbb0ca5c6a7a6. 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/JPE561601653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1862db2defce996310bc2607483e9b229616e5c64c2f777c1bb3925aae2dace. 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/JPE561601658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979660eaf80a0c4e956b9b9f2ff92237a34ec0ade9337491a8b27d8f2e96c553. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/JPE561804924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb7e71bded65b626a37a54769883a06ea75770e012a169c601a64c639585b01. 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/JPE561804925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e740c6885c3df99854ffe33c763ee636eda38c9993a084e47f112f2d9b9383. 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/JPE561804927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e274cc2ce9d9bdf2b4292626e71265840803c915ce0897a0fd64b60bad07db0. 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/JPE562006795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d0e5b38cb9f348d360c92d0419aee1835db905543af67a911bbb8aca280e3e. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/JP92Q2200650.
なまえとつばさをください (feat. 初音ミク)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fb00f0b5d57c692d45b0df40cac604c4082b248fc10834f4a35493f006518f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/JP92Q2200651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05891f5d7d040131938ef4a26289174cafd804816f9cabaf72063e5c11e2816. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/JP92Q2200652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d25b0dda2f5aed40bdc02b0629aed6929eb22dbad4e5dd61fbe2a34aaf7a55. 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/JP92Q2200661.
Children's Graveyard (feat. HATSUNE MIKU)
螺鈿の骨 "氷雨" byばぶちゃん組 (feat. 初音ミク, 人斬りキョンシィ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b58ed152f294f9f5782c63893a29f20f7a2c8ace5c17e7355e902702eb96db1. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/JP92Q2200805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8410b3bab8ce53d7f5ae71ebec9c63465e9ef88e4697236e85d3e0fc0fc59bc7. 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/JP92Q2200806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4152c45e4fb821feb25fc07c77c4b8a2a8e6573119ad22437e0dcf2a6e884fe. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/JP92Q2401570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12570289b0979b90cf2a1ef78a0201eed9cb376b86800d27ab08a94de4441a5c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JP92Q2401601.