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 0x735e17d3f084e64b1937c38609a138dfbda357546636e7a02c77689a5e128a86. 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/8bbd1363-7469-410c-afad-630775115ba2.json and https://artists.proofprofile.net/proofs/artist/8bbd1363-7469-410c-afad-630775115ba2.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 0x6bc8993675da9b24dfa4447dae59a5373476754cf37b88e421b1cda9796a552c. 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/QM3DF2248771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d4b258b93c720ab2e9f07440e32a44991d9f9aed1bc8355797486f8798ac93. 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/US3DF2422692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7e71170d955e10aa5823494bd0d3d7cf8f05f89dde0365dc71bc5f139556db. 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/QM3DF2280701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6e2daec61c0f7717fa664301c7f927969cdd79acfc373e666cabfc26e59d1a. 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/US3DF2436492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb7be24b9f8d38705711680d366ada99ab11efbb795d51c0da200f33a486e4e. 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/US3DF2436494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d51f7f48af1bdf36817cdfe2e7d805dccfe338b2651326a9ad0f1f65327ec7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:04:43Z), 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/US3DF2436495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9cc14dc24f92380c8a7ac807262fe40306dca2af27182557189157ef20409e. 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/US3DF2436496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835708d58a0e4624959623515dbeb5ed7f1cd59a6fdc7db3c47b9e4a96a3adfb. 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/US3DF2436499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34be8b3bdf918b6bcc6599e56c0a6edddf77efca8a495eaf968136dfabf2adc4. 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/US3DF2436501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3105d6edbbee5149680a0465e1a93e3afb1887c72622e55810aba0b7e88fbe2. 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/US3DF2436502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7e85152b933d06b9d37eadfe7363a6c315e89ef5f2168d57fd53ca15421957. 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/USCGJ1922693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d8b60cefc020b8e04397979368382e31db15eef2da2b562c35743aafd215cf. 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/USHM21961675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fcd437a7c52dc0b9544bf9d5ee38915f2c02818c96e58b61c01d435b49231b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USL4Q1954274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64b3c2f24d74e7e4a17f86f506cc47ac2fe17a5754b9cc9ac037cdcec2f5f62. 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/USHM21936582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb7be24b9f8d38705711680d366ada99ab11efbb795d51c0da200f33a486e4e. 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/US3DF2436494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc372bdc4aca170173dbd191359f324f5a6fd4c0082d14d86e7f2f4ca81c2b818. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNJV2416349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea42dae9dcbef88e9ccb06306b2b94f8bea91eaf40b589f97ec5b327c081a8d. 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/US3DF2439650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b441946739ce013b53d377ccaf85de4e4984732c6d8b5dbd909e40991b5b7d. 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/QMANG2430302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc8e376b89f5d10f7c535c0e21d58c31604ec7ac2e43d5ade1f061dc3d27b0e. 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/QMANG2242317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b5af6fd4b3f9733f02525d89ec7c4b62522b081907fcae9b8caeea737e1a80. 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/QMANG2211373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf302bdf987513b66ef7dcbd4f534c8912596a2511aed88975195c348ba1f6f76. 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/QZTB72383607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b280879ab297d518c6469e51b8cf3548df260fa38064cd61e519fa9f584d653. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB72381225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614c37a94d3e0f346e81e5dba56aa2b8079e9f70512fd246f04556eb7307b351. 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/QZTB62328794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76398a8d312a5b0f96c5e523c53b4f2f1308a58a68be529bda11ab9c324619e3. 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/QZNJX2369547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6b61a306120b60f6738f8214db6e70b5dbd273a0776b63c45d291a3e0cca89. 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/QM3DF2242312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785f13217f2c5cd45fa13dc2a5ab9475276497d7aeb6adf9767700633fea9cae. 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/UKACT2371822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a27dc943704b8f394d66e79e3132fdcfa91d467fe3850eaebd83cab1abb3be0. 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/QM3DF2208026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc4a44b2151c6011d61a0dc5415c1d495b00f566060a32921fa2a128976389f. 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/QM3DF2200667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61df1a4f2c71f6c3679ae9a8078962c00f01a90c0b146a6859dcfe070ff5772b. 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/QZW9K2281626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca4f0ccd16c196f70f3474e7b7f541b8837ab4c2ca210a66e4ef3a4bc63dbb6. 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/QZNJZ2206584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0d5baa882773950214e614b5b6895e35dba3f27ef009da8ad2c6a8c2f84fbf. 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/QZW9L2224748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e893bee807159433a40eaf8491241853b5f7397e2fbf0877e4921f90ebc831. 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/US3DF2112077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed521703d184b70499ff05c5d70ce0f90e04b84e49c1d0db5f427ad14feaca7. 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/USANG2265227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023397ab6b03b861fc56bb430754a02a037c5fbc9bb6b377f5608b46f2952eb3. 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/US3DF2248482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1c3cd5b8725862c191cbb07ad5a0c2ebc72d7c3cb7bde330ce2d620680a9d8. 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/USANG2125063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a81282f9527105854389289a2ac73bb025dc7b845b8498aff083b3d39773014. 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/USANG2103707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b8d045384e5bab503414d4a40b48bed7c9c6e584e6170362aa12429e321ab2. 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/USANG2219525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1107b9af9f8dac6c24bbe4d883d15255f6315b8c7ef1d3a32dc55c9db73709c9. 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/US3DF2273747.