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 0x513f2f1553d44dec74d3b523832e90ea6292a7093bc20e537857b27038bd70db. 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/c5aad52c-dd04-4133-b777-5d8fb0ef3969.json and https://artists.proofprofile.net/proofs/artist/c5aad52c-dd04-4133-b777-5d8fb0ef3969.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 0x90aa198e97689895bbc5c3c6d41f2067b573ef01c871b8dff4db0563a25b69fb. 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/CNZ331604017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaada759b7ebf26ad28339cc027efac50fc90210bcd7158da2f98da066f4fd779. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CNZ331604021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ca9eb7165a578b149a876f87d490ec19bcb243b8d870ac8793c988ccdeee06. 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/CNZ331604312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f677cf59c83bad309e3731a85b0ccf444786dec71cf734d771d7472e0bb713d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ331604318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf370ef1abe94f3b790cfb4b8562730a6c64a667252dce8b0c527d48fa537b56d. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/CNZ331604317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288260f0c5d18e2dce9f018ffbcccf321ba0c367c353c3176e706253e8eb2609. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNZ331604316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8f498ab9b41f13f8e84375176475d9b9781e67219a469e83865a97372ad971. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNZ331604319.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86033100eff2572b92f9261fdb8f624e8250b84fbf8a87288a7a3502b425abea. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CNZ331604314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3aa7d6266d85e612dd3b9ce1e6d55dd5217a91a73802005b4bbf8ae9e79e6a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/MYWT10780038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8e3d21c791ffff8fd6b6c5ce90d8d3679856f4c5569f77edaa9b99edca179d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/MYWT10350200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396d4b6eb87146469b244900a7bd73f6678f5019aa00ec2cb131c1ef6fe645d3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:02:42Z), 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/MYWT10680005.