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 0xb145c40b893898ae85e4f227a9552260330fbc1f8438d70a6482b67c67bbec50. 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/7622b5c4-fa65-48c2-aa68-72d62a338ed2.json and https://artists.proofprofile.net/proofs/artist/7622b5c4-fa65-48c2-aa68-72d62a338ed2.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 0x4d0b22ec3096fe46af8afcc42ab6c696da5e3a7f06b3e78606ab1ae4dcb4e942. 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/COAF42392909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f8423e6b7f3c44a05ff48107004f0112562029ecbebae187062c5acfd637ca. 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/COAF42392930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61881749e415791c75bc11d623c2b5530ad33f0293b39b600435edfccbfbb3e2. 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/COAF42393226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561eac3afaa456ec79295db4ceaefe9ba3093188a330d2286992712e4b72c8ce. 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/COAF42392890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1099ea67c18f0d437e5fef98d441a9f0070b60ae733a13d1c636d971e2e3b16. 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/COAF42392985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89f92a67f4664e49183b88cd7cc045e326f55d90897444c8946d0a3d7b0888f. 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/COAF42393241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64512fca2aced921a5799aa76ddabde19a14e1698f5812b00aaf515d679dc623. 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/COAF42393216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6460c5853c7d37326bb121e115b806f0deebfcc3f1652e6d44b703201d33ef5. 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/COAF42393221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6460c5853c7d37326bb121e115b806f0deebfcc3f1652e6d44b703201d33ef5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/COAF42393221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89f92a67f4664e49183b88cd7cc045e326f55d90897444c8946d0a3d7b0888f. 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/COAF42393241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61881749e415791c75bc11d623c2b5530ad33f0293b39b600435edfccbfbb3e2. 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/COAF42393226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1099ea67c18f0d437e5fef98d441a9f0070b60ae733a13d1c636d971e2e3b16. 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/COAF42392985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f8423e6b7f3c44a05ff48107004f0112562029ecbebae187062c5acfd637ca. 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/COAF42392930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0b22ec3096fe46af8afcc42ab6c696da5e3a7f06b3e78606ab1ae4dcb4e942. 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/COAF42392909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561eac3afaa456ec79295db4ceaefe9ba3093188a330d2286992712e4b72c8ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/COAF42392890.