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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 0xfacade52a9167e73ef2b83a2ac59f8bbb661a6580eec5400da0ebcbd6d5ebeb7. 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/896dfebf-cae0-4fbe-baeb-eee761c04fc4.json and https://artists.proofprofile.net/proofs/artist/896dfebf-cae0-4fbe-baeb-eee761c04fc4.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 0xae18a01f2a52093ef120287e0edfe9915a9ab5021e6442e5b28808647a412e85. 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/USMBR0401163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f27d2f2ddcf33468e50a646a553fd35f57bdcfecbf0f1482b141b72b6182ed. 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/USMBR0401137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae472aa2b824082336c0dda92e296eb53af0c7926d91ba0753c87fe8a548115. 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/USMBR0401138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36da88e211135a4c57bdad137b2abf736e3965ed677ae92622a632609641901. 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/USMBR0401139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4c51998be7eae0321862239e28b716d885b8423246daff675109fecc231850. 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/USMBR0401140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc9bd517e5885e73d90e9a6103357bb48227a50d2e4ea77fb4d7c53395ec4d3. 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/USMBR0401142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0fb1e38a29a193b104fc1a7372e78bdebb9521de62a152d39a098542e4f6c3. 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/USUG12408857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54dbd69c5860af392f073a14481685d8c2ffa3e59ed537598a14791a6d2d17b. 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/USUG12408858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c089812c53303250b1b08c315a1d59227f14058056b242a7b4324b938066f1f. 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/USUG12408859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4789e7b14f9126a03018f482b5d8bac4fda4f26f8dd10dfa8aeddd6d49af68. 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/USUG12408860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dd21bae2d03726830a104d4a601c3cf3f22b52598b7aa762bf49c43ab5b492. 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/USUG12408861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731287e094936f101b53721dbf53bd5e403ebbe9c45277c1e3dcece5e534c623. 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/USUG12408862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb15a04460fe3c0e3b879628788ada22c1eea21fb3bdb7cd3a5f034ffac1f4f3. 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/USUG12408863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9125dc8db6284175edcd7753490da2a6e5bbd9a9855ba51817e3452438923261. 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/USUG12408864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bff4226479ac0579c9cb28599a3f4fa7b97e396f4abdd7d6ea1f0c1546fd8eb. 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/USUG12408865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3211ab23f46661a1d7ea87870b7f4a1970637f5f0de0ebdcdf8dec54f6b8efd3. 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/USQX91100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1aa82ba0da26d1e0e50ad976ea8fac1eb0a351edfb2333f559cb6eaadf64ce. 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/USUG12408866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfa674b7bd6ee08a9996ef8bb0c5c1b83d50e19daecabc1a8cb898e3b04411d. 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/USUG12408867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977ef363d3af1e811f0db30819fd4d5d393d13430411056208f543b92b2c4a94. 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/USUG12408868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f1a58a8f5ef6b98952c2fc96f578630b53f7f3f4d3a309a9fe00df294e9866. 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/USUG12408869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc054fa75d655a91b0098bb8f2094ea9bda311b6362c6f35d505d836449afaca1. 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/USUG12408870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec90b91352ad834c449a80c83bbcce0a33334d4b67d3efc82a598c6407fc785. 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/USUG12408871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe770fd7380205edd3a4805175bd1b181be8710990240693f0895dc2d69ba7e1. 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/USUG12408872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab256ab86c50369d65462a5c01d3ed6e2eb251c169a80e1b988541ce6a22472. 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/USUG12408873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9ffa4a85a8be4538a4fbd45cdfb449fb290cd729f88c8df25fd861659eec20. 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/USUG12408874.