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 0xb411c81851a72612fd1d82afeaa0c5a0021f02085c6029cc2d2c8e8b7df16f39. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e35c9d5b-fdb7-474f-80bb-87b7f8400649.json and https://artists.proofprofile.net/proofs/artist/e35c9d5b-fdb7-474f-80bb-87b7f8400649.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 0x40bbcdac6255568755da596e7459167f8f4cc0a8c65d01693d5d891d442f9460. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM4TX1569110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63443bee634e6192d141fd5768d5b6932264079a9fe1b143443bbd8b0a6edde8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM4TX1569114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f45914df5f44a20eccc2c626bfb480347584dd780fcf08a11cefeb176e74b6. 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/USV351401099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aa06e404159502ac3ed8bc8830b1b5ae5a515fc749f2361b69d12aeaede793. 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/USV351401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529ccf096a17b6ae2919b92dd91cc1d85111f4c01f4432d8039495b68e1ac36e. 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/USV351401101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa09a4f899be9357ac6ef52d653bda7899f2586b658ee1c2740152aec8823b65. 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/USV351401102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79269d0ca9dacafa622cf4d1590f41e8b1a2bb48de8f73ae00915299e24ad37a. 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/USV351401103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae495d5c032d90bed4ba527c0aa1f3ee8ecd0f55c6a86ace5e8fa0c9b63be78a. 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/USV351401104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf285cd6574968e5a1a734b8ba3b3049fbf70deca910bd038a82087362be78cec. 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/USV351401105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1fc12491417429651962adf022a3a61be9a8934d59b1852a9cdaa583396110. 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/USV351401106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889e7ff0fee777a332f51d5078085b3d61bc7ecac3d16854871d242125ee01c1. 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/USV351401107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e122d352b7271cb034390a77823e87f7e3188006e6f5d4886af9cbcc025c794. 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/USV351401108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc486237329273a6f897e2475a09b4f54767a1b8ad972e0a1ceed9d3f39d2437d. 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/USV351401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aa43b431edb248ad685d700a148b7367ec074e0117ba1998cedf9aef140f84. 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/USV351401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781a8e9e43578a7b919ad03745349b8be610b52012d425a617f89cd01be81c9c. 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/QMFMF1472652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5fe978a9a123e97464a27b8eb2e1f8d9846f7e012fc20d019b19514979b21c. 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/QMFMF1472653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb355f239fad1a45d2cb23f335b798f0b92ac50e73929601d73300201963eb4ee. 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/QMFMF1472654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33deb7eb4deb220d1a4c838bed3e773bf8bec6d917032dde87c8e42fae847e0. 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/QMFMF1472655.
Comptine d'un autre été / L'après midi (From "Amelie")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757a63c33c875190bc441ec9e8b8be2bb586f6c31f38465b567f2d7c1038ab14. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFMF1472656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15118a37c7a2d2f93d2f46a5c96b94a40d8c63603ddaada0465b956bca006295. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QMFMF1472657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d250fb12fc1be39cd7721d97536abab4608702d63cd488fc21ec7d80e4e85d. 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/QMFMF1472658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6130bc990334676d51f7d5bf396a887bcd9e5303d0925da0a0b84d4e2fd6e6. 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/QMFMF1472659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe891f8709cf4894a917b7f3704266d9d49e182f16573fbf7da102e2515a52330. 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/QMFMF1472660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92c5f8b63e5d4ddcb83a7a7535bf4a7cd7dae5fe80ef3a63b6db920438a5164. 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/QMFMF1472661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512fc5bc6698840364eb1adc958cfbf3e630e4b1f3761157303019bfcfbb2228. 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/QMFMF1472662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777ae623809f42169d3fe0e28e8dea67303a513a12ff2fed2d519f2dc5ae2b2f. 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/QMFMF1472663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57525a4746db1f5a1613e3a4fcdb8396fe722fd7dbc09cd00954b216c987bed2. 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/QMFME1400935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4defff5729740050da81441e232e694f508006168739ad75bc6c43fdbb97890b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME1400937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1801359866bda45bffc68dbb109511e59d9923c6cd0814e2b27001ef65864597. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME1400938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fb54f5aa3f80f528d2b73b3a07a059c5967d448628ed641834153a2bd3edf4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME1400939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa872796ae382f8a110f6d971058b98589d3534dd8418f31e149ba773666cf659. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME1400940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898dc485453610e57c035321579f795822cfdc79c1ce17b599936a243e288b51. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFME1400941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b7c030666ef03a27f43fc098f0fe9dc5291845bf8066e1ce89d3f447e2ebce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFME1400942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6b6957faddbfa3080451926404d2383aa075838aa313b71e3a41be6671cd64. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME1400943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378a9eebb2e0a47958b865b2659b0da0569439625fb9350cedbf1c9acf292e14. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME1400944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08f645ce3cbc7a4830a7908ab07d2e05f0d549a161d815985258aaea96b096b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME1400945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea392567edd8e8ae31669cc7543378169bff44ba8af9b17d33c6af8eaf26448. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QMFME1400934.
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 0x428938cfd60b412e0262375fa1e1a2114a9b1d197fa89467a70ae5d787500019. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QMFME1400936.