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 0x6e90939088a978251d011bb0657865d57a97d5f838daccdf57bcece2d04ddd74. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5eda899f-377d-480a-abe1-8217e11e0fd9.json and https://artists.proofprofile.net/proofs/artist/5eda899f-377d-480a-abe1-8217e11e0fd9.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 0x9f16e98251d85ed7d5dd107f7b41ce482dfc36059f3fa855bcb928761184621f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:29:36Z), 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/QZFZ22492060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f39a224c383843d8e753802cd6f7f22deb86521d3be3b9a561b665537ed3b2e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:23:50Z), 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/QZRP52414693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018a51f6381e82ca7c1051785edd0341ad365593e2403728360014149051525d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZRP52414694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69d3ff0fca9683df98e088193ded2d7eb2092cc585a3aa496bde81526f18a06. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:28:01Z), 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/QZRP52414695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de1331b9ad10a439319e550419da63b3a0f07dd5f01c1eaa4523b4ca6d2a2fb. 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/QZRP52414696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13bc24c7a2e16f182a4338269232e871565f4f1f2d6ea4743f22268eea45dd8. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZRP52414697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91de969977b90c526488b555b9fb07e57a07fe4250973e675bee9324bb304c8. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFZ42584968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d7c72f029ca975cf2092cb5a3760bc9856001cb5bf171924e3ade13cc9bfbe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ42587519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2787c5697871fc0f22e8219c84c8e74d288bf6a53e5f1c745b10b862279a3c5d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHN52551075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2bd1fc20950dcedce1eb75b085508aa8153f8d6c711c8868d40b6b3619b98a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:48:52Z), 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/QZHN52551076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9058f5f86705ab868c5182d695103ff74c1bb7b062fa95e1f757598d689b120. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHN52551077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d7c72f029ca975cf2092cb5a3760bc9856001cb5bf171924e3ade13cc9bfbe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ42587519.