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 0xeabb4e56bdcc42602fd308b064e31e29727190bb70416eb91506e38e60a027c0. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5d4e0f6-9aa9-4cdd-8114-b80855d3f472.json and https://artists.proofprofile.net/proofs/artist/e5d4e0f6-9aa9-4cdd-8114-b80855d3f472.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 0x3d813b10584d686f3c19656c2fef8a28ba44b63d014a97933b8aa7edbddf0d85. 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/JPZ922409161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd09e6eac25418b145b637b6cae1de3e290195f98f2e1eab9861758d1700307. 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/JPZ922409160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99f372e05ea40879b2bd205c0e8d88d2f443b648fc498b96b54f05f5df6a647. 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/JPZ922409159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62b968d9291dc7b71754fd2b0e693b67dd2a265b7f6954b9f9ac8b127221932. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/JPZ922303454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fec66fee21c41e46e61fa1fae10773517b61084eeaaad4ffe62614099a276a8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPZ922303453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508b4f89b38e4b70a99448ab2abe5a6faf82b54ecd2084a83ad6bae00f2ef269. 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/JPZ922204463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff8a06d11d7a0898313c00f474a76094981c7d62ceb3e8183b538c10d6a342e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPZ922204464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47484e2655da84583b8dd71b2229059d3a2fca826185a9de8288d258d50240f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPZ922204465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14577014b6c6810898a6fb0d93981bcd575ea98d3fe0d46d79d697003221ef7a. 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/JPX492101212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ae22f59f05d159e1c050c57a6944458f76196106bd39a2ce92b8c6aba0a20f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/JPX492101214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f53a9aff497d2b6c3f9b047feb7b03e134645f7556fa9b73c49da2bd049a47d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPX492101213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe035cce3b1341b6321aaeffbcc11502d53770f8b4f3c4cc1be93fd24d943a36c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPX492100931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407b8a8203860a7d059497e46aa0ed6e9ddaa5532038a7bec96948bed24fba1d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPX492100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdad43d57836b0239841dd6636fbbae43e15df62bbef6e3124a3e4f58281663. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/JPX492100932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfedabc7b0101ed5d7d69fd1399350da34a174fbbb900cb329027e4641c7d13d. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/JPX492001910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3589b099906f05c8f042e7b81e49a278264512f2b83443ce0c0ab968cefe2ee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPX492100933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410aa8e3caa611b47bd9e3863d06cb8195e580520464b30ee3e55f273c5b5223. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPX492100357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410aa8e3caa611b47bd9e3863d06cb8195e580520464b30ee3e55f273c5b5223. 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/JPX492100357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407b8a8203860a7d059497e46aa0ed6e9ddaa5532038a7bec96948bed24fba1d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPX492100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfedabc7b0101ed5d7d69fd1399350da34a174fbbb900cb329027e4641c7d13d. 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/JPX492001910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c622bcf8a1f20bfd0904afd98b2865e1867f20d6ad568c39a3d463cd3e0e71. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPX492000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b34c829fe0c5a54b7f4f834acf123917af713d132b1ab3d953bc262f37c3a4a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPX492000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ead33bb5530927edf5c43a69d00f40e57ddd7d49c9fe258ceb71beb6e595e78. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/JPX492000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f73489a95051edd2ab21d6057e941cc576bc54781c91d3d028949b53bd5408. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPX492000124.