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 0x3936ca873ec4140156659afba35875b77d8a37326b7f1eb6fe175072a18fbf1a. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8294a1b-e1e2-4a66-bb37-9a76c2b9d48b.json and https://artists.proofprofile.net/proofs/artist/a8294a1b-e1e2-4a66-bb37-9a76c2b9d48b.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 0xdaa533adef30b6c9a4e4703c4bd59db4cd3f892aa1911eee7cac20798c7ede5a. 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/QZTAU2217099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e370eb91bdcf95e20f35015a267e71f991b12ae4224e38d0358e5452f335f4d. 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/TCAFO2195125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089d645dcd5d16e4ed6f9529aeb3bec25e2dae52993afd7f986afbff88daeff8. 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/SRA022100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421387c9d366c18e9a299f1bbc8b96201f99ce5e119c46488917217232044b62. 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/NLG661900468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa281dd368bd7690a19f8df783c68448ed80b676b8f9a02ec7522f16416395f89. 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/NLG661900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36268acbf4f32ee9cab3ac3b536ad51a9f7cece7ad72a2ec29c2b6b93d055682. 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/NLG661900469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76100399abe8e847e70ceb7e27b2c86e59838dfdca6ac487cdb019efed46d787. 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/NLG661900470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1edefe1e8ca00898025ec614f9cdfa38c802ac84e9f70c0faece6aef8005043. 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/NLG661900428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242646708b4e7830690adb8770de39525877d7f16b2e19cf1b4e7c6a6b8d7333. 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/NLG661900423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25fb007731353a398a53955ffb460bb57d50888904e48eab77abc5c9ddb44ef. 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/NLG661900471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201e81d5d1f480f8415e5be820808df35bc3dc4b2e0119952244dc4456792de0. 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/NLG661900472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f49a94f1583ee49147f16b7df37edc3a964ce267c8b384820de671215229d4. 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/NLG661900473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d41ac8d790f179673733b013d195993030bbae5baa61b74c786af77820dd928. 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/NLG661900415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285e5bee6ad08a8dd539a2ec7f161ac6568025c825eea7b5a51ca2e9fedeb74b. 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/NLG661900474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de42f6caabba6b9f13bd1baaf2712cbec7395138d67ef99ba81855f088a3a62. 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/NLG661900475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46352615e335d002217cacaff15fbb62778b29d007e8ffe981474d5bb92899e9. 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/NLG661900476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896d3b0049dc9a58561f559be2233a98addf2aa425c5258bc37834b4c0eb13f1. 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/NLG661900477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7af14a6e91523135f73406de1991c328915e730eb5db4c7be754e975a53a744. 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/NLG661900478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86dbeb57dfaf429689eedc49e45ccbcbcc5a66b3e290af587e6b0f9e5e69f8e. 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/NLG661900479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a16f02b30ca052b415dbbd57f446d8e37ed3972794a8d982c51eb5b4597eb7b. 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/NLG661900480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7616a9f27194fe737e8111bd2240bdd013fe3525d1bf7c7b666d50ed216620e7. 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/NLG661900481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cde2fa17bbefa752f71aedeab9c08c3bc6c45d59d795390179656839b08394. 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/NLG661900482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7551f635ccc05e22b92e95bbca3fa904c9a6eecd666c291a66576e3c465561b. 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/TCAEP2085638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5d51e943b5377ae8c3e3f0746cd38abab82ff5c2417648e5d7b36b602d98c2. 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/NLL5P1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e1c20e282a09a2b794cc45b326d60357d2af9b11ece9de91278aef23184e08. 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/QZNWS2062606.
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