thumb|Trinitrotoluene spin view Trinitrotoluene ( ), more commonly known as TNT (and more specifically 2,4,6-trinitrotoluene, and by its preferred IUPAC name 2-methyl-1,3,5-trinitrobenzene), is a che
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 0x6f40be49dff1be52e0f7ab3e3ccdee08d9a56efed1ba35e2c0566a2138d0b048. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/266d6eac-df55-4beb-a8c7-557cabf15c8d.json and https://artists.proofprofile.net/proofs/artist/266d6eac-df55-4beb-a8c7-557cabf15c8d.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 0xe366800cf80fff9b0e184a4bc89cc0d19ffa89b702900cf8d2dbbec65187ca22. 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/QM6N21463349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583f8387e9809bb6d73c4452cccf1ea8ccb89b7eab8fd6675785f0bb22fa3993. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6N21463341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050cdfbba58f1f854e90855c2662b93378f80d4d8c553b7a22e9201072eea7ad. 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/QM6N21463359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb48e4a4e05c5ebd5a36a89badc5be88f867016156c66c9028cb08755950f9b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6N21463342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2337bf26e4b7269f3f3ef833b05a6abadf4350ae6ebdbdfb1e66c3918e9b4655. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6N21463346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19e2bf6b68299bc3e6ba9f9d90e0b7a00b2e48c47cd210bfb9bb5dce43ceec5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6N21463344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e9e0fd30143b55773fb2532082173f5e873b938a4fc96daabf9824e50e4401. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6N21463358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf0668a028afd51f3b03853936b0c55cb426206d27133d62bd08465dcc968b4. 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/QM6N21463355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ed391091fde09fdd849dc9f3bcb0eb20f4fe898f7cf123187c246f57a02cf. 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/QM6N21463345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cd55e922204b1f3e3689148c61053e7da5e5f5d1f4c05fe09adc8a6558df70. 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/QM6N21463357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0dc5c401da7dfbaf39294bdfb1459d5eb02bdc84650ec727b49d00c7873843. 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/QM6N21463351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744426390349a93a8d7c4f69d881b34617fda81e3a14da1fdc1c224a5aed6874. 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/QM6N21463347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2312089d8432960690bc759fa78923ce8f3a9cbe7b8129355dddaaabcef58b6. 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/QM6N21463352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da040cc16a8a6db2884f99c72f1b5f20f15b66f5294892d4db130877b61f0ef. 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/QM6N21463348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa732e1df62f6d7f8794080634123010ca7bb344b86f968482c768683163c29e4. 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/QM6N21463353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3483c9ef97b1a7224b4fffca082188448a640ef769ca48de5d329bc7b9892c1f. 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/QM6N21463343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66053e36918f947281171a6117327f34ec7820c5d9320e1c9a1be142fd6ba99. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6N21463354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfe88a94904973cd7d47cfcca2cc49fe22c0f24b0cecdbf08970a777431f466. 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/QM6N21463350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228628b1aa90b16b7c10e3a588b4b4b7b6226207402525a94b851788e0a71d8d. 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/QM6N21463356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb6970eb263965442011d563b950018fc797bbe113754325bc4271f7bf5a7c0. 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/BRBMG8600001.