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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbadc3ece246138ef9ce74f0c1c3e3f4e844a04b244928dc843408151895ac9. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d8f9dbd-40b6-4f62-9f44-a9975e843ab9.json and https://artists.proofprofile.net/proofs/artist/2d8f9dbd-40b6-4f62-9f44-a9975e843ab9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4149cea286c3e1afb9e059b8c1c10409a84c39b4058b806c454c67f064eb77b. 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/JPW462373037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111ffd2a11d93d7cb9ef0def66237a3b47f083d6075630dd3b60085876b2c3e3. 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/JPW462373041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7c51632fc97c17cabb733beb020c6494b26a33f515ff7b2b40f36bfed5000. 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/JPW462373042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc658c3c5600b1d093f738c6fa4a403f35307a3477ca4f4e2df911a2eea74fd2c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPW462368270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58edc8503e503c4f39b7ebb4392f21a2c617a0057f6539dd57ce82db3e4c8ae8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPW462368269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402dd258c372693e292b457986c8f01a95095234721f971cc252b528959e612c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPW462373039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d166a7c37c3c09513c56828a6484e6254a169f3ca6e6fa57451d648f8f44c20. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPW462368750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abb8385268db96a769127d6be1428ecb560e9849ac3106934793e048944e9d3. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/JPW462509453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4961276c30a178c5278ba8eaf154f94653f0c32d2d1bfe96d2d311ef98f4b1. 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/JPW462515048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d88aebc5213cddd099211aa1f437f716c420842edd18063f396ae8edea68345. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPW462384743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2052aec95d8f70037bc09402976971fb76e80a2a72df6c953d27d386749896af. 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/JPW462400206.
キタサイト イン ザ レイン (feat.初音ミク)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4705893d7f729c0db54eb035ea121fa28f4c8d0568ef687af75fb95e2fae62. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPW462419279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa916aa31ac31f75206a3cd732e80536acc9e02c02aea4f039a69f299c0419bd5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW462432399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1241538e12c9d2f891edb782bce486a212f252f43a1e0dbd8c657959b0acd94. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPW462410095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194fa70bce9dce420f57b371e0d655eb9f6249a1bfd6fef4bd33f2b9373f172b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPW462439425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd91cdc4ac5763684bc233ffbfe71be620bc4febf42a4282e78ef1932c451dc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPW462415552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc320236e067af7dba0f4cbca9dfbd5175789864cc0b93e028bdd486073dd9c60. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPW462463045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261b185b64d15288ae63e7ee2305592026fbedba133ec1c1a59d3bf5a428da8b. 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/JPW462424450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa7256145f19f11c5fab7b80e8d4ba0b32e19871c94f7596a29bac5a6b91777. 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/JPW462427807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee92abad96813d388342904bef4c821687ab1f1f4b5020f30b53622ee947f42. 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/JPW462427808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffcbefd8b522757e5b50be0efd916b541fe87549ef83fe9dd8f5bcd32179dff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPW462418741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305284a6b1164668042112fed20fb7d3ce3c20bf09b4525d6591aff50e5db4ab. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPW462468182.