TBF can refer to: Grumman TBF Avenger, a World War II torpedo bomber tert-Butyl formate, an organic chemical compound with molecular formula C5H10O2 The Beat Fleet, Croatian rap group The Black Fish,
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 0x1dd02368397375b8b252a6136760cb61607aaa47c223a5ec69e139eefe12e934. 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/27dc906f-4fdf-4550-a52d-86b8d3e470e0.json and https://artists.proofprofile.net/proofs/artist/27dc906f-4fdf-4550-a52d-86b8d3e470e0.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 0x8d4d388a1c0ada5d948e1cc7b72514970d031161c316c2fd7af0a1f2af379267. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/HRAA40000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba1468d9220ea1e58261891941407031a9731b2e4dce72382704cad1229f41d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HRAA40000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c497e57bb9fc78fe554884768add01a6dc3bf8f3e8a6fd1d0a6c9c4646bc98c. 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/HRAA40000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7b9ca7c23630addda6cd0c91337ef66fa9c05f170427ac681cbeaa443e4412. 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/HRAA40000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6615e96afdcc1950dbdf3c58f3cdafab23910407b48eb7d08ea1d770fa726466. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:34:34Z), 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/HRAA40000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce8e92b98d885aaeaf7723e1a12f48ecad635601c07672d1825e34d24d534a2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:23Z), 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/HRAA40400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96601741d34c6f3e9c901f11dc44142997101fc21c39fb7e5b478184e36f40. 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/HRAA40400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1566ced5c8a70736ee6a5b5bb10ece5c24f365c2fcd3695fe23f2d63e37e9fd5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HRAA40400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dae744f0cdb4ab2f030aa21b78b5e97d9414fa5257115ff45cdbf2f20efabc9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:04Z), 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/HRAA40400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b952cb746ce31553a79c51855bca4afcbf41110f1422bb8ee355b9a109bed78. 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/HRAA40400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c51fe6bb1c2a3bb348056c9831a9c5085c3bd7def339d73fd814e79dd66d91. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HRAA40400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905e7590d48af329baf53fe7e1d1169ec8e72985c59a62fec0db8222d26a4cdd. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/HRAA40400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb582c45d8afa1585a70cc4d15446ea33ec47148e78a45dd49c2960289238e5c8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/HRAA40400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba49126eb00ba1b04a466c7f33f5c266c552f44baee96cfce0702939fd6235d. 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/HRAA40700214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1f207792d5e428b6e73a090d2f54cd930dde0f75f8e4abfeb335418d4535ca. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:56Z), 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/HRAA40700217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec51c41aee7ab4e94fc78890a78b789ae14f61c6b3a2d2e9e98ff7c1cabbaa29. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/HRA049736399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f8d9e9ed335659e37e3811b1cf5156e6ae093508418810a091b4e0cc0d09e8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HRA049736400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701fd00c74becd749e27968076018a29a7ab2101c031cbbc6f5d8d552b439e2a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/HRA049736403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38345c9c2b94d9f7adbcb78b7a5cf8340e094184d918ba7c7c9acb987d625d01. 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/HRA049736404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c58a9ef148ca441b218a29465f5c47eb8b688e994c1ed65e106b29ba176b4f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/HRA371400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea45da70766b6eba6249b15be7b26f1d4bd01317a1152d2581832354d5d42298. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/HRA371002037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c5f5256c99949956a4b88987c8120f1da70369535644698c525ca7d9be1417. 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/HRA371002045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4338a3c098cca30392cc1a5ea82a329abcb1a1541c7f54e520fd7b116c96bf5c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HRA371002351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8051ccc70cdf9b61507ae24b1020449b0b0f89e59d77da1ae8d670bb1e07f562. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/HRA371002352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d661e368632bac89fda647f619cc622b3aaec232cabd67e6cf1635d354a492. 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/HRA371002353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbc6b8194043c8f1104099b8ebd0c1bcc43078950ed26a0d44981b122cb3fb5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:56:36Z), 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/HRA371002357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcfb3480324318af67263c925dae3dc0aa5975430d5e02c3d0e7b73b359abdb. 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/HRA371002358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d6e19324348c51a3d18e98267385e8e568975d0e7f2998d945acf271a1762. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/HRA371002361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702e9098de51bfa4a0cff68aff7e72b5537f3ad53886ff78d2d344df757e2497. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:45Z), 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/HRA371500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4772e5559c3a97b10481d349e23155de2a82d6f8f8b0fb8ada219498ed5add31. 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/HRA371500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e17a66aac405787b4848f15e53218a999f86dbfd92ec7a2f22d05764f5da94. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/HRA371500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48c4fe021ce024f9033621167f04cefbc981e729c146d479df2f006b507fed6. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:49:17Z), 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/HRA371500070.