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 0x0778919f28c44c45d9e73ed1e55a80449884f53caa1cb9499255e1e2aa832b69. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33580a77-7ac0-423a-8a60-abb2672d303a.json and https://artists.proofprofile.net/proofs/artist/33580a77-7ac0-423a-8a60-abb2672d303a.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 0x8ef98c078255dc9208d73c41950c7ed687bfd08327e79eee617105bae69c9615. 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/GX5MY2359994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00691bdcf4e1529f4d514627eabd5ae341fbfa0607e935e9f4d8d3a21b89ee14. 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/GX5MY2366106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524dad969716bc4f325bbcfe3a849c94dac4659d565c02a32358b1b1f0f97b30. 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/GX5MY2379939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23c217d856b6fbee6444e58f1468735ca5827e5129a532d4e54f16e034f9cec. 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/GX5MY2350134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b09ffa08cf6fc7507dd7ddae7afcf822a9a9560220c966c6c0b4b91a6196a8. 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/NLT2H2300644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f156271303c65085c23234704c9fb4f35997d5042e55aad4d31592612ddb8b. 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/NLT2H2300596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282a7dd839d88185a16e4cfc19961608eebf61350b457ac6f6d248088543e418. 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/NLT2H2300595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda291a4c880994c805be258b255c0a4665e4fb425aa6a69342592723fd975c29. 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/NLT2H2300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864be3c4bf2214b6cbcc5ccfe6c4b2b63b69e74d075f1997c84337a98ada5782. 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/NLT2H2100569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0de8d2beeb697a20ef01ae67532d00298d1e63309b814795836222b0cdb27f7. 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/NLT2H2100464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3f9c435c1544d6eced965b714762f16795dcc2431fa92b5cf2b4958a23b752. 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/NLT2H2100378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7e81209fd91df16c49c4aef81333a5e8594608775d5e676a1bbf71c05909a5. 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/NLT2H2200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a384017316af3b0128e0c84c9e20824e54fd2ceeb0e2b1c1d3f35a0fa16b75. 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/FR9W12239953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb6a487b1f6da768b4875719dab623207014c80bd6bb483fb78896c4be19789. 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/NLT2H2300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f5843d45e9a2fea4e84013be98f5353b6f029f5933901d36fcfb3ae3ae6114. 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/NLT2H2300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8969a345190bc21662d1ce867a69b9c98216bb017791206331e7b705f300b4f6. 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/NLT2H2300094.