Nio or NIO may refer to: NI Opera, Opera company Nio (Buddhism), guardians of the Buddha Nio (electronic literature), interactive software for audio and poetry by Jim Andrews Nio Inc., a Chinese e
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 0xe198ea267a5e5454cb7bf63c248ed05829d5954e4071109057f204de6f219386. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f95bb754-1b5e-4e0d-8ed7-7e51f7766b28.json and https://artists.proofprofile.net/proofs/artist/f95bb754-1b5e-4e0d-8ed7-7e51f7766b28.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 0x2ff4d169dc25f4917efb5b4799930a0e0ee8fe63599a0bf772d4e8643dd7cb07. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWCC32311475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4842038829a3dca6b806aa7248527624b69e59d82f0192dadfe9ea805498a8ff. 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/TWCC32311476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dfca1bdb9d86ec7d98e5917119657c57926f417476c555fde7d65df1970fb1. 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/TWCC32311479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249818ead8b2edc969e8fcd977183f92be73de3af5fab5567d74e837eef083fb. 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/TWCC32311481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5137274b4fb4237e51fa9021c8382ae85174d0dc37e68605a8c615cd2f835ecd. 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/TWCC32311482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d3e980edef1b27639ea01ff4a708528a21fe48756a0c723e34c853846270b8. 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/TWCC32311483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82eb73f0d99f2f935de754f52b0d3cf1b9f73ecb356a56f54b420810a635eba8. 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/TWCC32311485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359021527da7682df8dad26066f85b10e18411acbee59ba18363449901861f93. 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/TWCC32311486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a374afa9ea2808312c68c0e236240e28a0ad67771fee789255a5753f4d58ca. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWCC32311087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ce7faf71b53fc411e1fed2cec4ee2fb08a872fa47ae7473998bf2b1d45e30d. 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/TWCC32311089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4455a9eb7fd0e38dec9dd30b1fb8fed787c4223cbaf86ae3985eed062395b61d. 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/TWCC32311090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f052242bd953346513c69a86088757663d28b4bab961038af81ca0a3be85388. 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/TWCC32311094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d41dd55d3f9af16141460e3346762ec49e0fbf3d286c5ea344deccd9ff8fe92. 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/TWCC32311097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f717173a84c0bb23b90729680d98772de4620660bf5652d1cffc1d5ba9a703. 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/TWCC32311098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11b8e2cb5942bc218764cdedeca8c6dcb92567bf55cba0e8492f2f0e45f60b4. 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/TWS172000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2edf1fbb4f599afe603151a80aab09653fd5fac3667fbe8503505bc57fd266. 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/TWS172100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4aed5e23bdcbfd22b8818b8ed983cf25ee5dd63766dad80c5d2cd2332b8d03. 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/TWS172100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e27c1e5e2b74ebb4d4b69cf705947f7a56c90ae4c9976179092a4e79671cce6. 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/TWS172300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef0ad82904653c08a8e86c17df4d67483f507c96f91bd546022f7324640204d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWS172200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30569fe66b7fec49d092a15dbc81555e6b8db73fee1a44cf1d787a21d61cb24f. 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/TWCC32318482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1003cb7cf1b46740085b7422f128f65181e1e63cca72c85dc22d62def1893c55. 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/TWCC32318474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32294f49c52c62022c3e2abfae7478f180f4dbb255db49ba3c4e49838bb89456. 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/TWCC32318477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556ff9a39180cac2c4f732bd4e42136b0c1f142fc6e476b6de176c87a5d355d1. 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/TWCC32318476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b3bc1657fa8dd01d2f7b54c4d3b1e867de712375d020da9daca599045abbdd. 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/TWCC32318478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2608cfb40a7b60270b9f378b4b2d56832d7b641cf5206df87ae643fc5ec51dc. 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/TWCC32318480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4a5932d2d0ff035f1bab4920a6f57b1e89a301df6b98bcf302adc264140b5d. 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/TWCC32318481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c2309a8ff235d82c4d2d81924abbb40258022c5ea547e988bca7a9ca07036a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TWCC32319620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fb29e08881a126983e96fe8572d9e49b59fb9a3b724929199a49b914252220. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWCC32319621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecdcbc178da147c417b20ba427edce5e578284740167a06a860a3b9f65b92b2. 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/TWCC32319622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857f55487e748e51b0f4f9e68759d4ae20b1a6c847777a0e8aaddfba18d86288. 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/TWCC32319624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe607d2cde4b2f95e0b5120e769b3d2a8e4d02cb0af2b346050c081e7b6553f9. 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/TWCC32319626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e489cc3119e6b271532ca31e4e77f687635c5ec6275c5e5cdefff6dd6b99182. 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/TWCC32319628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826bc2826e35708cd1098f5d9e78d6ea2bfb0a57374357d879f68aabb6f14c4b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWCC32319629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9957898f82c44c85168b253f6d39e9bce54f62c32d7dd536752e1cfac7178850. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWCC32319631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3c475c6911ba7486fa129b2069f46818b29016283d52165187438f44ee1233. 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/TWCC32318806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144fe8f1bd6f348537e11a9e8ad3d475978c7113860e2c361bf6d41f014076f3. 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/TWCC32318808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfc0517ecfcea57f1d8d8f2519f5a1cb2dd1e5be32e3bde412f75aa8c15b8d7. 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/TWCC32318810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115b2f918d07bbe879123fb674742d907eb1b3bc70b36b6a619c3ff037b72954. 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/TWCC32318812.