TTF may refer to: Science and technology TESLA Test Facility, testing particle accelerator technology Tetrathiafulvalene, an organic compound used in materials science Trend type forecast, an avia
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 0x68661ae4dd236ce54fa7f5171efbe134f63b0608fa0946874f371963980351d6. 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/bbf6b124-3800-4f59-8b0d-46b4d81b87d1.json and https://artists.proofprofile.net/proofs/artist/bbf6b124-3800-4f59-8b0d-46b4d81b87d1.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 0x832f1bacc306b41fb54d874e38b418fa382529b09f1763607ba301efde108a53. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b20c7de0b411206b6b4084638d50dc12847e808b1cec27f87a6306a0574f2d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7407161afd4623618a73ea5fb03cff6b4545867ac07fafe86ca4b14e71f79bdd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd03c6b93d6446784e54032c179bb02a674faf8a0bcdde35343ead15c4b08e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8b837b2262a49f08dfba8f672b8f67f06382bb421f8946c0c752b0598550a6. 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/QZWDD2287263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4492294658c4c5fa97528ee322bdde9c1ea65c840c2226bfe6c8d9ceb4ad5f82. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9536e533e931d4c0bd65318ea233ba01146b51ce5ee07d8ce38bb7e8e1bad88. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2287267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68855cbe6abf346269260263d9ee909513893c1910367af7c05b7af7fc8b5d84. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb3ba3d1b8bc8491a1fd6eb26a452d365e1ed91edae05a2dd95cea7094ff081. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2287277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2055cacb56198dd530e79441f7e165ff4de4037b913abe5387b98558ff206cd6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fac04c838a317836bde9e3f39eeb8debd5fa15e156902b5eb9cbf04fe122ec0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cf48feca80c578af53cf9c007574022ac58ae3d1518a95eeb0a490cc7644e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2287296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05fd909a9b33b8d334cd4a3a6e08ced7247f1f42a412c519706084120bcb4ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2287297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d32c3941de0588dfa111b89d22d756c18197abc344d67a4920d03953792127. 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/QZWDD2287299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa324a53972bce3b6486d5dbce854406c3fcea40b002bd0e0aeee41a853a75061. 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/QZWDD2287309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a12d87b90eb701cb00e77c9d704512da8e2bb28070dde5b72aa38a0f551fe5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63206143d13ae4f998bce88274d5308636878d76f4a3f115ae0839faf1f29e70. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2287315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97adffcddb4ffd7d95a3c7020526ca7021c0b3678837a3f9cb56c6cafdc82a3d. 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/QZWDD2287318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb63dbe461249ad9334fa84c50a70b9b9c3e399ed22c29c3b307a3b99a025a8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2287321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e945693a14aaa65ca8679a9bf3b5d9a3165ae530ddd28184c07a07cad42af8. 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/QZWDD2287323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94defe630f710fd1dd7519723ae79826c2e040a53ccd4b19bd74fb144fe34239. 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/QZWDD2287327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f5ccc150685b766e48fcdcc8eae80e5102ad6e3865cb7acd219255a22b9c6c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636ba8bb2d79ad995f54657e8e2df2fea427ee26bce48ff28af7fbbd5739b02b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb7eaf5c928a3094f8842094f83f4be8ac140ccb98cbf7c02422794f9bf3727. 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/QZWDD2287341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3aeecaecc001db7e405ea65c33fcdd55b45fd6bc4dbfc0d3866aaf1d599c5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c90c69476ce46c27850586613df382c3c52db96d91d1e10bf99f7ce93206c. 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/QZWDD2287358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c9c8e14653f746030ec170c7177970e4dda9acd3049f578d7cf19bab8fddd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDD2287363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d94e91192256e94523c0f7744e2a82a04272d5947703eef61fa1e2287b21a1e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2287370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b823cf4dddc4fcb18e48d54793ff0c92e57d29995b8fa1c4b0f6965e942feb. 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/QZWDD2287373.