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 0x1b1fd15d6961f85216250154f8e8e93e2b47a844eaf0002a4feacce2998d48bd. 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/e2d93dfb-b769-4779-bdba-035922560563.json and https://artists.proofprofile.net/proofs/artist/e2d93dfb-b769-4779-bdba-035922560563.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 0x1a1624dccbed5e0f76de2ac282f1bfec84f0b93351facdba7370803f404b4295. 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/QZDA41911150.
Giả Vờ Thương Anh Được Không (Dance Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3ccc5f7cd15fb6c6fed6061269836c3d661f6bd65d6c19ba1939bd234ef082. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QMDA72293791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a981100f0f6dcf2aa70bc1106327a97c738d6316f47635cdca62024d6e9ecae. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QMFME2262213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3f0476aba0deaf5861f2bf379114a5f8e7bb493f84d21c8c07be58b858fbb0. 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/QZWBE2325123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dfa4d111b80cd72600a6fb304657a9cb7aee718ec57f50d23b69b1918a17a2. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZWBE2363313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2126901c84907814e75d0e3699ab0b4bf916f9baf85c7a67da9af0af1f6cee15. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QMDA72354854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec4865245fcdb1ec9fc7a0bfd2d3eded63793ead4f1988e59211b47926d4ee3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMFMF2438628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5027d3ca85a68ac9e81ba8576cd8e2bb67f3269e98346327b42e7788d50e63. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QM4TW2545973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72b5361595d44e4e46c2f7edf1b1aaa3cc0397a7fa484db4992df5050656ef3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM4TX2560432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ab856f31409b1b7c07ad037584c2926708edde6eeb5b8b96df32bdcf5ca240. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FRX452514641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1160f0ad8c45ee3d88dd2f2bdca884315c0fc3c00bb76f56483a2d55db90a3c1. 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/FRX762575499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78fdeeb8114d08260ca79b342342f420a0e107440c0339c786019a60e90921a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:11Z), 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/FRX872510212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92db1cf1917e71cdb787a221c99d38fad818ee719d23a5475faa58ffa0df6746. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMFMF2556634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0f3b567106d26201856d8cef4d54e0971ac462999f53f0764239c78df22621. 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/VNA0R2500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47099ed7e7987c4dc92394c01b4729eae49e4fcb4ba3d0bb706a7279b552a42e. 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/VNA0R2500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf433ffde9091d18dd89d846ab08971cc29ae1bc3983e52e942c6fce27e84082. 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/VNA0F1781469.