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 0xedb26a0fa9d2671662aeffccd6c28f2468e5d3d4a2e9b3d78c0ef968430cef8a. 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/b9e71a02-eeac-4a28-be9f-bf4b7a9fcec4.json and https://artists.proofprofile.net/proofs/artist/b9e71a02-eeac-4a28-be9f-bf4b7a9fcec4.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 0x2c1d8da84277d632f34ae7622b94146f8636d9bd954570a6d7885251b6147ae7. 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/TCJPN2174022.
study§steady day! (feat. Ceui & haruka shimotsuki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0f89de4517d8382fbe814f201a21682399b4c43b6199935c3773ccda227f38. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCJPN2173794.
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
natsuiro ramune (feat. haruka shimotsuki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee612476a307e745fe959bb7517848f57f8378e481ebc4fc5389434ab01251b. 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/TCJPH1877970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74652af21ee777adb838af44ef03a07d427e812a1e4fc2bd165e385e12921e2. 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/TCJPH1877981.
treasure pleasure (feat. chata, Rita & meu koharu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd673455fdad3ed8876f85f55c7c63b76cc8ec6f80807fd9a43d25be9fbfb6e21. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCJPH1877676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1235f8573a4eaa8e59722a931b29543a43466187aea65e0a0a1b6e1f1117f268. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCJPH1877973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa212bbc419c2c7b1f7c464f598a15767d97bb1968390c10e3f7d74ff7eead450. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPH1877591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506ede341715a342e2b49142685f1270fe32f20ded1701baa459cb9900cccb16. 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/TCJPH1877598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9f01230faa0d02f6dfc3608e915944d2af799960a3a3ab97d17a90b8e99c1a. 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/TCJPH1870750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1397266568d9c77c7f00e81ab82ad2204cbaaa2a9865c17986c151ef655b9541. 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/TCJPG1860588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac76e74ae6283e1f7a1f87ce19d425808f68b1c249a71155b24825de1c4a777. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCJPG1860590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc076bbaff4f13cfe66ec9f16d8711c0ed4e4bb0dfee554208c2676cfce2542. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCJPG1860592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7b6fe85b72d5d1b4267d8803ca12d67435267610812e78e8c1df2f52b21ef8. 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/TCJPG1737123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305a1eac72a8f313c04067909461542bb6ee144bd602da821a0c43ab412ebb2f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCJPG1738593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea779235bf871d73fcd783e7f0646325031765d2242094ca856607cd0d50e6b. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/TCJPG1738600.
"Ouchi Ni Kaerumadega Marshmallow Desu"charactor and sound album
marshmallow whip (feat. usagi tukiyono (CV:choco moca))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0ec40d41e899505865824c14d76695870211e8565ea1a139a726047c047026. 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/TCJPN2173645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1130abee53cdf49cf1778549b10ec3850c3e5f1a2e0a04340c7dd8ec6f14337d. 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/TCJPN2173769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48c8e84aa767d90016774740e6e008ee8c60e60a74c9e47c5b9eeed9474cb45. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/TCJPN2173764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9a310274d183f4996181c55c54a6f4e7853f2ce30e3d5d06a57a252893897a. 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/TCJPG1743014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8663a26fe4843e11589e5ae5cdb22c1122a5ace61b41c92887014557fd60db56. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCJPG1743015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e019f102396cce7b44efd06f8d03a80657aabdd319f0e6058fe3357ee4229b. 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/TCJPG1744956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1019063987663e3380b3814e78d88698d09dae0cf5a01bc02149391fe10b05a9. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/TCJPG1744952.
"PRIMAL*HEARTS2"charactor and sound album
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc55e91350119e1bbd94499a08276e7a8c96a7eea4e69767f64f70c643ca475f. 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/TCJPN2172792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb976b2b5bcc5012fc335f1ca98aa271d22ec3e27f2d5c4325b0d1fd6ec3e90fa. 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/TCJPG1740986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2cf069922aa764a255f2c3aebcf439831662cc9cc49e75fcd1da91e47c2f76. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/TCJPG1740996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25085f5347afa9603c7c1ddf9db833edd5091d5e7e655ad129b4e2c150d3239. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCJPG1740998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa642fe13d58ce06974a7bb41b05c410a94c493ef7d3a70407f843e226772eb. 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/TCJPG1737112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71223f7efe2941f067f9c870b9fa4b5b0db889033b607d5de9eeea7cee8c8e5. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TCJPG1737113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b5634e068a1b2748a0a3c7354529f61e6ff2520b80a7494e4cac81b5ea441d. 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/TCJPH1810046.
"PRIMAL*HEARTS"charactor and sound album
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3767db54d0e3a220b854da1b695e4e493459ee293a51b3e339ddbe27fa0133b9. 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/TCJPG1721090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6067506bc100fe36b45f949b29b560272d7feb08ad851a002cca09c22e861f54. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCJPG1721019.
himeto otome no yakimochi love vocal song album kirameki summer song!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed05081f620d2e84583a10f02567a3790d6b5a67b6219594fae727005dfb3a69. 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/TCJPL2086317.