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 0xd2b2db6ff6890d67991c23dfc8e7c6b0e751b467ebad8bcd15a3264344ebcfc0. 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/308c36fb-1ad4-41c2-bd54-2d508846acd8.json and https://artists.proofprofile.net/proofs/artist/308c36fb-1ad4-41c2-bd54-2d508846acd8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x486c15cc4f7eccf62d091b5286b13e8f19e0b2c228be92d3f5b1ecd482a0eaf1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES03S1400760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f434b39c82836d30b450d7aa77af11965dffe01ad3f3c047f71bff898d15dd8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ES03S1400762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1867c1d1074a4de514c6c18f69a4a914f3df4618ef00ec72a00bd6a897ca71. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES03S1400765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822355c7bdac81b5eba93ae38de2b710fb71333b21ce3bdb1de505fbcf359e54. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:49Z), 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/ES03S1400766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d1237c4f37d1c36529a068c4d2b91a2dd64a28340a622024922b9a0db313eb. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ES03S1400767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582420358dc591823590b2d7baa538091090f1ce81c96dafeadb994db203ffc4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES03S1400771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48dcbb9a532ca6a24ff7b123bac938fc5a5fb111248b680951644719fbed5b2. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ES03S1400772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110044ea4d8ed085feb78ba462bc94708cb57c8cebf87d266a91be33f0f43f46. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES03S1400774.