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 0xa00295dbc6fc1ce1f7ab014eff8dda41276af6a9ce5294a85e3d8c7e296cf1ad. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e332da42-b30d-454a-bf57-56f922aa9133.json and https://artists.proofprofile.net/proofs/artist/e332da42-b30d-454a-bf57-56f922aa9133.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 0x2c0e804bb7b52751e3fe62894f7b76f84baa332c3107bf77e7b805b9f34f76d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561902796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a748f643a4a7938ea967341edce322d9f6695b631671787f5cce2a914427ad7. 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/JPW561902797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c63737037fd744793575e98131970c9676ebbcc89b821f8812e2a0cdcd2ae3f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561902799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9035c62a157b1e7932893187dee04d46e71a70a4815879990710171c682af2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPW561902800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72d1d3d7a339e3fc82fe828f51caa81db991d58c171f253acfdd81a94a861fa. 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/JPW561902801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a41c36b30ac503c61a6c5123c38e153fe508fefa5ba32145e01f9d4f99825d. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/JPW561902803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed6fe75b14d7b211e57f920493b68aef7c085e91053096eec8f5f2478b4d7fa. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/JPW561902804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4467b8e43858f79eb3aded0730fdd6b7098ea4e4b67145cd21489ad1be34b517. 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/JPW561902806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a92b276b520df3089af8d80cf790f1e53282c33683019e92461703fb995ab9c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/JPW561902809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8267ffb47ffa90d50bda8fb3180f7d7dec4219e1a527bcdfe871f03d3fa5371. 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/JPW561902817.
FOUR SEASONS OF LONELINESS verβ feat.サリヤ人
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667e771cb7aa7bb980356e31fc3282ce800047258f832b04a560667a5eddaf93. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/JPW561902821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e0afe4b2a6339b4c7f125b71b6fdd3831bb1932b0364173d94530863718d38. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/JPW561902826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbd8c8844ed11d0300533b316401bd0f7ba686f29f86d7f86b4806309dd8432. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/JPW561902846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9294ff2abcd8cbdba6a287b5afdc63bcd330d291440d3c331a0aa31598e9af. 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/JPW561902847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bce676f73b9cd836180615b4967be1ea334d27f0ce8041a62b44f3c9a93418. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPW561902848.
孤独に耐えせし少女ノ祈リ feat.福山沙織
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a917b86390ac9d4af7b917e0ff2700c7e8792aa966f0c2c1a5bcede651f825e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPW561902853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e040bc91155bd5dfeca6c4011d321081e33b2534a8d0a28a2fe6a20719d606. 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/JPW561902855.
ハートフェルト・ユニバース feat. 小田ユウ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f87f6a99bd7bed348ccb6812fb54cc34ea5b38077b05c295ec47b2644ffb61a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPW561902856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3ea60bb4dcc1333c9822ab6a578130a8e22ebd053d7d7056f46c362f44df14. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPW561902858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55604e8a71eb2b5773f3abe0b9b063c110ff82de4bc96c5fd67a0bc2bd0fd29e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPW561902859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac507083750c302f3894113cab49996985af785ad34c7ccc3058beab22c41b6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPW561902863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e0f15cc8fda05f7b77e701890b880b8d314d59c2a9c3345b81567259039bf6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPW561902864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbee7aec1f3f2fe8376c428054931fa89406af780decbcc03c75f146d95d2dea. 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/JPW561902865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a82c452cebb903937cb607afda7c1bb4ef076800a10fa222c5b9b0eb11e1da4. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/JPW561902869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a82ba89b5c4da68b3a389cafc4b12e3f62a65ebad10ba3135d2abb1a05f94f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPW561902873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a56051ddf65324cd8e4ead7ff7188930b028aec536cd43503496765c61041b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPW561902883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55e1574d7f535dfcede234dcf64d6f2d877dcd81c9dbd46de456267f3d49568. 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/JPW561902888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22494a407d769196d716e3d15f77995c0f1fb2a761e1c043cc36fa6159d8aee2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPW561902893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e798313b4f24211a7330eadb02440260efe2e4b137456f3f8080f90fc6a1fd5. 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/JPW561902918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0b421f15a6b565a370f5bc35f2889a688b9d2e185b6c7757bd63bcdda759c5. 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/JPW561902920.