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 0x6990f14948d6d88ac4366165f0e32908723af8ae4f6874fe27adc52ff7454515. 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/f6158f8a-843a-42eb-8eb1-895008659be3.json and https://artists.proofprofile.net/proofs/artist/f6158f8a-843a-42eb-8eb1-895008659be3.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 0x2462f21d2337fea78db414dc495f951c2b2e6a4cfb3fb6ac6215a37fbb62f577. 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/DEPI82201089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3278efe5323ae2b173ec1b8d1c406027616a1751bc691aabcc7882e55d8376b. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:21:00Z), 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/DEPI82200730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4806f1b76001310f9270a2867e2a3667bc4cc5e178bfbf3698aff142ff66f93. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:53:17Z), 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/DEPI82211431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4be41c0849eec043e9fad733e1f0f24b8d98926d06ceda113d1b0bff8075bfd. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:49:43Z), 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/DEPI82304542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f523d7eccdf1e7ef5071ca39f7a8615d3f4fac01557f9991f1b93a295dc1788. 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/DEPI82308781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d79e80f27dbd7d72e4c69fa3c18514f1f48ce2ea4aeb8db09b161ce4fa3ba8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEPI82312768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15276a0fdca1e0768eb3e940a52b643a765a16aba2ae6a0be4d8b50b1a908885. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEPI82440952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb503916dc1a6cc31013b46311234038f24bba969dbdf7d84e4e2256ed8f8d533. 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/DEPI82452767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d3e20c7b625f659de2147c05d8b1e1c6d6c646acc673170395ee96d1abfd34. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM6N22566113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ccb516ea993ec15846ad2749a80e353aa860c7d4b09a2e5086fe635745bac5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEPI82511375.