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 0xbf8e250b42bde3e6a2ab606fc60e7b0b1dcf323097d4403232bb229ef5e2805d. 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/e61f369f-d02c-452e-a04c-d85583af071e.json and https://artists.proofprofile.net/proofs/artist/e61f369f-d02c-452e-a04c-d85583af071e.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 0x069fa28a4df8d22156a1ad381cf7ceb903c6d103bc645b13b0575319baa1379b. 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/QM6P42211647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79e56bcf137f9ce22078e1849fed8e65b5a15c176de067c49adb8c490291146. 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/QMDA62202098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48909c631c90f848ca8b42c4c93bb572bdc0db63d855e046a13756d011b1f3d. 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/QMDA72210760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa737a153f7f12d1b0de69b35eb20181c6fd2845769e8df207de8611ee824a0bc. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:51:45Z), 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/QM4TX2302639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbcf3845f863be093a7830ea0cb88d6d5f8bffbbb2ad49a59c43cb361e9bb29. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:09Z), 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/QM4TX2383226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7796a342c99ec7a9d19ec55ee7c90216241410c358c7143c502b057a87fbdbd6. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:31:46Z), 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/QM7282307159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795438a05607dcef6328e396ab82c55232106e2f6ee0eb58ad77b8ec4a7d37e8. 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/QM7282352478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6de227561161cc70f9fd4bd799af7dd3b2128f1008b768a55d26476aa5f9ea. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:42:25Z), 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/QM7282352485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958c90ad70cf9185f5c08f9f7677515ede3cf95234528c713b09c9f02241730a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZYHM2366816.
E Là Không Thể (Remix Version) - Thành Đạt Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30279250a878bb6bff845ff41278d34a5a1db1d70326686937c436501fe351b7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM4TW2405581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d89ccdebb9b3d7c87c15c64c0913cdca7ad375a8c3b7d414d46b408adb3b2e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR59R2441902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25e7f1c0404318a08d6c8600aff978cfa1a53cb2add3dfc8d4dd200d268be4d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:20:18Z), 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/FR59R2441905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77516c830e9eff2a1f2140981d7c8c0dbb2f7dcce8446d664d99f31c81fe2c56. 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/FR96X2431962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9b851b587f5e2304583eb0ebb7f0467092c6a8de3d53bffe98d98b71002b0b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM6MZ2446406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1363966b0f61d5aba8805298c30a7774232a2178f7a421d24769cae905b219. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM6N22488549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7ee7bac1f27b2ebd6f9e79a6e02bf840408cdcaba3388981bb2b9542273a3f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6P42423288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd1e84aac350d4d58aba879f7ece7b62ebdc8e2896e1abeb7e3b8329972a01f. 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/QZYHM2419627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978346404483317f00d19e468c8a9ff6b879c21f525616f381c0e791d9761174. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:58:28Z), 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/FRX762538028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb2be43c27c5aeca06e12a764276788c44c7939d4a83c4bdb7f80d5c90b8640. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QMBZ92483883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7530e3ee0e3910eabea48ec76af17ebb802e274c5d2884d78232da3c5b2ccea. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMFME2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5d06bd8daaad26cd83c398949c81b0319e642f06b24eb482370f06807bca05. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QMFME2441851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dc5d76df117bfc0d9874275c0b4264fe44182202c3187d4720e56cebc812f7. 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/VNA1M2401306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe556789c97eee227271da5b6c0b7c61414ed9957b3da93ebb72793bf3b28bac. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW2530148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c49a5624c04777fcd918b024bd2a043550b730e763ba1062516787d4e7353f. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QM4TX2530758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeffdd438ea890f5c9518e83ba7a9a76922931d6045d8ff75b1f8fda1660bd48. 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/QM6N22549185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fab1b8efe019fece1e9082fc86979d62f5a50a03dba66ff770aa53f6ab72f1. 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/VNA2J2502663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea08ee092748280d359e7d0555caf36aa82e9c416657e59377bdb9890d5f708. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:47Z), 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/QZYHM2506659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c0e80ebd23526abea6089fc86a5fa8e8e26d29e45042fcf1de994584c790d5. 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/QZYHM2506701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236c9210c7c0b4d2c43a87d44d37e91ad85dda11b6aecef903910824e7436843. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QMBZ92550827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4db19d57a63518e18f5a5a4eb3949dc9d3b4bb6ea89ed10518b1142972539c. 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/VNA2J2502719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a4f6a6d8677650c256297b0fddc95354d1653f7c49fde4243d5100a8bfde4b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QMDA62523762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51c17c30da55c9ebbfa63f50b20b87d279e31bf1ff273d7ba169322f9b9b743. 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/QMDA62543878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42048f67f00b635b04c3b9b0c9ade45cfa165a9b56e8b5145fa024130076e58. 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/FRX762530374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac40e5961dd02cc2bae7e6c4c8ec19d74f5740a81514b97b134c1188c15d25d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRX762552416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b88c1d3cadc78e46713bfcf7cee734c4f4df185a7627b91ab44a94737eb596a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFME2556009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe8462107f16136b0ad362013a5b2737b8eefb90cbc297c0c3bfc1da35ccbbf. 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/QMFME2551274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02af0ffa25017bcb575bd2d083bfff8a6b52187416b0b452a715999d2c6fac4c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA062519373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81ab10f71e425bb65bdeafbd3125328b8238ee6a66d2b16be767757f60a9fe5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DGA062510869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1551b93d81c5a15e8b5c5d9c71c7d30598b369c03a6e23adbcc15274bace48. 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/QMDA72455670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20d6785d1562045b05cbaa0a2921d0998dd67562ea50c371c8ec842b8376d54. 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/VNA0R2500149.
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