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 0xdd5c422a63417285196c728a810f815e92cfdd80ff401af7e31685747bfc958f. 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/3b8bfbdd-4e89-4000-9102-48782c21e141.json and https://artists.proofprofile.net/proofs/artist/3b8bfbdd-4e89-4000-9102-48782c21e141.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 0x00cc46f887bbc1cafe39f6dd6ba63f2e60d79aedeec33ebf8abe9401b628da13. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:58:29Z), 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/TCAGT2331342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c01c039215150d4b2ebbea91a7e148e552ef4cae100ed92dd13771c1887ed3. 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/TCAGT2331354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723d9cfec18213f97bf61f3cdf10239c7705ef653d8a072f9dfe959b63b6de0b. 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/TCAGT2331367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7df053cd59134151a525499fc1dd3087302fb0b93cf5ee94d1f69dcaa6268f. 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/TCAGT2331419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6f0f15d4959a40859a5d22aa4e88fb69e464f6d55cfb1807daa916ab2f781f. 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/TCAGT2331437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514aca81ad3f9e57a396dc2618cd86d711bcf38bf37600583203c8df1a35e512. 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/QM6MZ2272013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668f5201f2088da92da34aea4390e39070dc3a86f7cd9a2119da4dbe957b6c9f. 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/QM6MZ2272014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f8eed8672ee647d4eeb47c075c64d96268247caa483681b7d04911fccdfffb. 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/QM6MZ2272015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fda5d0dda998f52523adb36ea226ac220e67f2d4431396aacd7e64d66a5abb0. 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/QM6MZ2272016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855977e335e6dd2df43510d87c4699bc87c2671b36d88f3be31acc69e5ceafcd. 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/QM6MZ2272017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30457eb9c6aef11f94e48638406d2ebbcd8d0057c604064b9daec426fe65ed97. 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/QM6MZ2272018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97fd5563a8d2c8ab4a25d912258c59113567600b158241432b7ec36ef3ff46a. 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/QM6MZ2272019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2c4994bc3fd4f281859cef6f0b3f85a36dd685512d9dcb982805a41f32bb70. 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/QM6MZ2272020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe23e6b5823df0ba8803861752363301489681d311b29aee271abc7b39dd958. 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/QM6MZ2272021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53efdea28dfcba35612dd1a2a9f5a7dba6f3d65abd1cfd9245ea445bd18220dd. 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/QM6MZ2272022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f422b5e06ba32fb200f3bf93dd269ff56e84d311036ec213a96137e4a8f5d8. 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/QM6MZ2272023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba3c6e2b0b35d7969fcc6f5f58eef0edee0fe88a79d6d98982e6169ff013046. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:57:00Z), 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/QM6MZ2272024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbca7739900bb2befd8fef8d02c8169e10884e047db12bdc272c3a73cfc2f37. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAET2032508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caef22ded6c70b7ee582c0e4de49ab71f37b3f6b9c9aea5df683bdc397ac022. 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/TCAET2032511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f3637c79bbc9973dfafbb006828041221eb3fa9d874c7bd44d448fcd8da9c1. 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/TCAET2032512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6c3edd57d5f55cda8d6aefd6bdc3d056af67fbe2add5b1b5e657706c752eb4. 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/TCAET2032515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2722f9f8920b4e4f1fa8f1a21086dcbadcad5bb4e5a55650cbef78305bfef21e. 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/TCAET2032516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674c7a49e77dfc1863faf3ded2c476719475679c83dc0ceeb26762a0fd5abe11. 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/TCAET2032517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf899f831a20c28c998211dbb819dee7aaf0a9b28bf023639996ac4eb06fe0c11. 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/TCAET2032519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632740b1dfb8ef85ac6dd1b0ad5ed06d5bb0ba1db05b464e902c5af6b3cff845. 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/TCAET2032520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0248bb9b10ff1a4c4843da594ce73c9180c09afb08849e9e5e42cde5fee9abad. 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/TCAET2032522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef79ce241ea649904e01c4e1d89131877fa09c5f4c7cf01824ddaac36320d96. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:00:07Z), 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/TCAEP2057719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde36d1e08ac9454f95296d80f925c26f00fdd4002edf9db6774498aac18b9c5c. 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/TCAFC2043241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8a4d8cf5e3a55d817283480feff64f1eff1701d1a83b7812fda1a1312c22cc. 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/TCAEP2066630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfd263fcc50690fcd165088fc11a7b892ca76b594bd8a49b432bbf277f5fa5c. 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/TCAEH1907731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e7747efc1b56a1dacd0249a01c20d6b3870de1b36aff28708a0354e9b96592. 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/TCAEH1907701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd931b5d86758829512baa95f6746bc0a97d797bfd01ac7ec21fcf2a041295b. 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/TCAEJ1936900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e6000ef4c8ee8400dd56c124d6935017cb92ebd73e367a2abbc9bc3de3c6d. 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/TCAEJ1936902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbde2212a2d8eff9eabcfb8dd685fe48435c2806b4835bf22a16ca9358ec50d. 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/TCAEJ1936904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9022760cdd61709a4876332f7160c23e5826171f702d7f947937aafba8a7d0. 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/TCAEJ1936907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425864fd3ada3a972103dd8eb0b399df782005b1dff9af3fc233c5738188e1fb. 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/TCAEJ1936910.