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 0xb54ad5de36481da353ef7c9f3ba36f04b8dc45225c69abcf4112603c996efae9. 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/164443ee-bf27-4f0b-a3ef-9101756d720e.json and https://artists.proofprofile.net/proofs/artist/164443ee-bf27-4f0b-a3ef-9101756d720e.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 0xb9a52ba543ff96bbed8c933ff469ae41da2567e2f0ae0388d0dc835f4dcc1408. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR10S1895208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae921f238769331fb1c8104cffe873746eac974179a4021086de18bfdb461404. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZHN51913455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73b9f9c8d57de5835bcac6e1add95a49f3b44c69240aac4252a022470dbf6ac. 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/QZHNC1929554.
เพื่อนกันวันพุธ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a00f016dde478d347815b8baef8a1f397756a7a66f2d49c64e192250d8661d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZK6P1928685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce97992a91f70c055a67b8653236517ca9e5bf4f51d4eede0ba9f6b12fb5018. 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/QZFYY2093531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5705d0542cbb0e0c4f1a1642ca1989223e816b8cb66d749530023146efea2247. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ42001171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bcadc9501519e38968fda1efd3632f691f441a38d4528ebfeeec3c51fd03a9. 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/QZFZ52064090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4809172b03fbe53b208a49c8ba21259aef42e538d3c01e775e76f38c686ecc. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZFZ62016883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7641abbae9d845d6a731516ecd73bab7807719d47b07a462e1a1f43c0feb6595. 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/QZDA62036694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649e9a04116f8c7aa9c268fb8685f46f4066df1d94b984d22df2dbf2841d8b1c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA82046857.
อยากรู้ (ทำไมไม่รู้)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe787f46858e778db24f5e49ddcf700db669eb669cc97f8467091ef980a078e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZES92002563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123d26ee749f45084905363a3a64b7834c4ae9a5ba25b43683886dd6c1178cb7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRX282035665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b474b2f50a8523dc1863002159e348bd8da55799eee764d212c870b6267fa88. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/FR26V2070546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148ea6f5255183a926ff324e8e699fffee1d8003cf51a3c90c44e90cfca29269. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/DGA062039625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd29370047779ee20caf2b62095e0665f40cfaa524bdc469294b607c23d88ff. 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/THWTD2123600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd29370047779ee20caf2b62095e0665f40cfaa524bdc469294b607c23d88ff. 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/THWTD2123600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5421f3e393459758c90dc1e47b4721c1c5b907719a3be5ca124f1120e45da7b2. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/THWTD2208700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c0178be37d4290511b03b88063311c131118565c47d846f59a46cdd3bbc55a. 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/THWTD2410600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3550934c21efb2fdb1327ee4722fead7736855b4e2459b6989a3ffb51eef8fa4. 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/THWTD2410700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a8724b3124a13e4f9e99fdb7a63cae2a818ddc8429d4efb2339bdd8144798b. 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/THWTD2216900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bfed89fb6affd0a12917a2a3ca25d9512bb4fe195b7293aa0b2084dd3a283a. 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/THWTD2410900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceaa636eb59525f38d1152b47c205833ad82cc6878b3bf643c0191c1e9cfd2f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/THWTD2416700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf153e8236c01fbacffcc70ce3467a7f1887a8dc44b76cbcd87ccce78727450b0. 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/THWTD2416500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487d1abce20002dcfd5cb42020fe14f408c8ad216666927f2c4486a31c071ec0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/THWTD2419300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211d18d3e1894bfa1d6f387bc09b24c43fb64bd381d88f1ddca9519ddd6f15a0. 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/THWTD2419800.