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 0x7275446e6cef55b53e7f86d1a3c2369bd8b4738f1dca19a9f618edce09b976f0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de526709-3779-41df-b35e-632bb21a3f57.json and https://artists.proofprofile.net/proofs/artist/de526709-3779-41df-b35e-632bb21a3f57.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 0x63d1a7399e62ea943debfd4262ba65101a9cfbc85f8586a3ea00f5102b745413. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAY2438298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62073e2d2b1c84b5caae354e89324381a75f483cb67e9030ef88e826b04dd44c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZZ762425016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6195a624638cea5537251b8ff510dcc17056334c34e8ddc3c14915da5f7568f7. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZWFH2408362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3dd69ca13b20cb2653abfb9434ee1bdbfaf0b551c935717ea7ef54f52cb6d1. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:00:34Z), 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/QZZ762425017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b45058fc1e61aa379cee3cf6d7c617beba263192f164514175545c05bd4b5bb. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:49:49Z), 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/QZZ762425018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2797f96cfb09f95415a8ea2f2ddd2b44cfa0dabcb89d2b07b3a8e6f6440462c. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QT3F32429735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5ac72a9df056b4379b74b2ac700de75d5ee413620df721c6a93d11b31d60f3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB62551492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb1332aecfe86efed404dbacc10c559e93bb2bce6925a826d1ac0f21e09612c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:13:59Z), 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/QZTBB2562398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6007922d046282f77ce7ea3b229a7b10329d14dbd7f57ef142466b4c925127. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFM2556549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62de8fda7ec2295dbd0d8b4f2b55390aa7cc31a55a2a3bef8336f56789fcc1d8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZWFM2556550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98313f303472ad2e33a541ca27f5b3ba71c5a3ac652e9657b0f99a23889bf913. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFM2556551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951a34515c7f6ae77987aece959b004cc2c5c702a35ad93d9c65b2c7a386844a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFM2556552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb1332aecfe86efed404dbacc10c559e93bb2bce6925a826d1ac0f21e09612c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:49:51Z), 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/QZTBB2562398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b8dcd884fb59c3ec47e7d8ba24973c55f0190d5871bb5636e877ff9cad3c05. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFM2556553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5ac72a9df056b4379b74b2ac700de75d5ee413620df721c6a93d11b31d60f3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:32Z), 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/QZTB62551492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fad78918316c70cc84faf39f8880b6b536c4fe00ebaf496ae5dc1eb837e1466. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFM2556554.