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 0xeff7fc0fa74ec3c48b7377a9e7839b63ad172f6b46763783a6da2fba7d4fbd9c. 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/1ce5bcf0-b9d8-433b-88f7-f619d32651e0.json and https://artists.proofprofile.net/proofs/artist/1ce5bcf0-b9d8-433b-88f7-f619d32651e0.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 0x1fd07493d3fa0d0940b4bed008248d7c2d8af3aabf76f09a1f2cb1bd207928a4. 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/TWC010700671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562984c275d8cf021532f0e3c73c3801f529608636ff81fc92833ad486684327. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TWC010700681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4a076ad1a0a1968e0c8c11b2064b159b808ef15c3df57566075ddd38a58032. 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/TWC010700721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6185211d0176970af32b06a32c747c2d83545941b429a5c2e969429a9a75d9e0. Chain 2 (Bitcoin): anchored in block 957665 (2026-07-12T06:13:49Z), 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/TWC010700741.
親愛的父親(電影「窗外有藍天」、「理性與感性」配樂)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19325a2eb87ad33a2f09eeda85030ea8ac48137582a17eb3b1b0c0306113eac9. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TWC010700401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda7ccd5c03c44a3b74986c9c2a3ed0816abcccaa0f62bb04af8c1b928007a25. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TWC010700411.
鄉村騎士間奏曲(知名電影「教父 III」及「再見了,可魯」感人樂曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5c39c170fd48696376f58fa4410429d38c9af13f2a3f3ebcaf743f1e1ccfd1. 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/TWC010700421.
裸童(動畫「迷宮物語」、日劇「情人的吻」及「長假」配樂)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72ed046b539d1f4dcca744930ccc30cd9408028896714ee9ec28ba77a53d0f3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TWC010700441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c4a1dd92ef6b24c3db0f5a663a2898287db8d195d05b794426b584895a01a2. 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/TWC010700481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46957e21caf1e3073211bad4f8471de86e80a0d635f3b23c65066d3d7fda75f2. 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/TWC010700501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d31ef5bc9f8bd75aaeace09e7a9971df1e997f8cc5178022c2826e2712d08d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TWC010700521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1097dc4d384e1e865e36968ee3da17977313f9fa918b66da28d49d601af656ef. 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/TWC010700551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90f82632b3c55a852131161451fdffae8776b1d8ed60ecd893e2d0c36f0a942. 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/TWC010700571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458364d237d62c4e9181609540cd7c52c2f2795f921cae348a4de5975bd90326. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TWC010900261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5535d1769767e46fe747e33c45d11befba086b57f6cc19e341d56450ed0be7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TWC010700371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b828a376b7e75a2eeccd5bafafecc0ce136343c5b23431bbe5cae48ed8f1baf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWC010700881.