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 0x6ff5ef83994b1844f8a126740bcb94bb4e6da83ac8c89a04e6112cafed3bbf4d. 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/8eec938e-1ee5-4693-9d21-734f9a76e5e3.json and https://artists.proofprofile.net/proofs/artist/8eec938e-1ee5-4693-9d21-734f9a76e5e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xb887dcb2e1cd1cd8e7d7d1329307cfcaed2c7a4e5d0d3cd4b6ef2779be6dfa74. 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/DEMZ12101333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01be3c7ce66ea2df821e47b9340697bf5c97bb082e03a6247c5df9c5cab2b41d. 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/DEMZ11200125.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1810b6299d45b08b980bec4c9a52220aea44d1aac4d4a6bcd23605bf865d8acb. 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/DEMZ11000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32919b2c5e2bfbd531a9f0f4aa6f6b37754859ad7178d4f2c23af0dfbacc762. 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/DEMZ11000229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c4ff10e1949b529426517e801fbb6911a1aa7d6ad140087aecbba8346f97e0. 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/DEMZ11200075.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554a96f189486c17aec53421a23bb89c6cdc7f06fc0ec57b655a974cb9a7b11d. 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/DEMZ12100338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f5ca4b8a903a8652ede5fd0514f16ee6aa9e415e6358dc0c575bf9f0eda564. 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/DEMZ12100339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf86b614d16d0607a3916a77bcc09e0a8f15dec149ea21e0b77db5b81ea6fa8. 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/DEMZ11200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee689ace92f178f9a514ab78a06fc7225c70db20a0efe93d757e6cb72ac9763. 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/DEMZ11500077.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94270f2c44de8ddd0c974b5fba4e66217a7687db19af1d4f1f28b67f4f17c3a7. 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/DEMZ11000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27d846f164eb720455f9266185209780a39baffd99a7cce05b03c43b2bf53aa. 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/DEMZ11800875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d6a11dd59f2d759ecfa1c01f944e46dffde2c94a291389c4ee495ab8c8cb9a. 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/DEMZ12500481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35b7e4494acd6ce5e270e6c051e59dedb972fb18abf34c642b0153205041a1c. 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/DEMZ11000238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93a0714a187831ea928ca99175dfdb223b13a35bc9853e1853a67dfb5159bd2. 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/DEMZ11300017.