XV or Xv may refer to: Arts and entertainment XV (rapper) (born 1985), rapper from Wichita, Kansas, United States XV (King's X album), 2008 XV (TVXQ album), 2019 XV (EP), by the Jonas Brothers (2
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 0x3a97018aaeaea04f5a1f156988107129ff97aa267f49ac344f5c5892d395210b. 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/d1f5192c-453b-4dea-b7ca-ccddc94bb039.json and https://artists.proofprofile.net/proofs/artist/d1f5192c-453b-4dea-b7ca-ccddc94bb039.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 0xc34688374bc039f4ab6ea44b1e08a6c4b216d3efbf2cfde047cc10a5c0e55d04. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CH6541700405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3124ff61998f9fcd041aa3a338198c39d6e72eb7f0a0cc0602726131147b0a0d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CH6541700409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf942434d5bd90edcd1c098e76ab06a3eaf0d8fdd4d5ac90af36ddddd0204f6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR0U91501904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829dea34af452aff25121552a1cd245a733b6ac4f8402a63e2351496f3137729. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR0U91501906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043d0b1297a4dd110a05b6b992dbf984ccd3825f4625350dc95e3e1670aab04e. 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/FR0U91501907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60f82389eb9c15811ffddc44840374be5bbba2d0edfbc857aff8f17e05eb8c2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR0U91501908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe432b0f2384c23c77cf665fb2c58e78853727b885e1540c73a9d9dad9df3aaed. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR0U91501909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75009fbc65010b9d6b6585baccc26c77bb60a4e5f732a8be89453d5e3940f662. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:52Z), 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/FR0U91501911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd015f01b384c001ba7a254bc90cc94331710808a66565056b193286f34cbbaf2. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/FR0U91501912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ad1b6577a7359c269a999ba4c9c3c7caf6f543707920349847aa36a9a3099c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FR0U91501914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1bfcd4a1a01edb7f1824ed6ce12de6a7a99fe780d57ac14c7ec0baa86c7800. 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/FR0U91501915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bec56305f5b22aab008f927f0b9eb611bd1b4fa43f6656b6c857fc253ecaba. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR0U91700284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c0b775845000fc2e8902f4a6c57ed0d8bd17c4e359da047b88d709993260f5. 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/FR0U91700661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461ccd04e30214e195e29dbcfe5066bd8f9ebdb0f1a0e5fa4905876cf9a237b3. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/FR97J1700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdbb18f16749b7668e08db87f3c7a4d78a6763352b29c592d502a05e0dc94f8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR97J1700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf627ca574a9ce1d726e54db43cff3124da79d7fabad781c309c8c322518d02da. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR97J1700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541d5fc2677ca27723244735f9653ee90d45485d17a9ee82786716bf5b296cd7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR97J1700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94835449380023234e365dbe574425870fd08b9ff3bf4e9166e95d090336b7c. 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/FR97J1700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b58b7daf14c1d10ea75e3f9147f395b9165642ad927d37285c158b5f765ed77. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/FR97J1700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214a6841e4990e6c0b7663dff0d0f566c98cc2db93d1c5d736a036e8e2f69cac. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FR97J1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8616faf6f884f0cd62b96f15cca45a879681d73aaffe07a2d428e4b41aa4bda3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR0U91701291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949bb863bbb1dc8f52688c7be2ee7a700d132ce4bf7f464587c536e2a5687597. 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/FR7LD1800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ecd7365d969203574de52b758f9ba6abc862903859608037bb0cb7c7ebbaa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR7LD1900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4393ebfd94dab5bc713d8bbc0cff451f17784f9ba2ecea523b79e7ce4c0d9fd4. 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/FR7LD1900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b4b7497ca88288c5838376ec63100c2b7791a1e710469cba17f5c3b1114f36. 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/FR7LD1900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d00ddfe3454a130ee8524274f61b08e410c0db2ad74779192aeed608c1055. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:30Z), 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/FR7LD1900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b2cc4cf8ab6993050c3312aa427da4e18a536ad7caf9fb7c7c2aabc41d1098. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR7LD1900240.