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 0xbacc2a7c9464b071c4f337a1467f8247285094df6aa247f71fc3edecf732d95c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7829a752-35cb-4471-8ae7-d8ef806ad579.json and https://artists.proofprofile.net/proofs/artist/7829a752-35cb-4471-8ae7-d8ef806ad579.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 0x50fd5936fa1c1cc5a6e6a807fa0095a59658d5cdf3a262d31989e1fd6559cf6b. 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/ITO102049786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30eb82f9e4718c352a275dc9cb12dd4da926f1fe94220f24b9baf14c2c597a1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ITO102049787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf77e22fff3aad510dbc3197a8bba4f3c103f13454391573d0dc533f9130d98. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:00:55Z), 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/ITO102049788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d160a03fae5be5536adc9565cb1d42242d19539e934cf0e2192ffe7d022459. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITO102049789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c276355f8c6d46955e2b34ee91283361760133dc8cca69d5126a03cf949c08. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITO102049792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b299c9f712bf6fa3fff52f82266803535b1b59d19125e4962637e61200e3f3d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ITO102049795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842fd938d383029ef4f13264f07189b9762fa2c28ca0b58d5841e22e1da027e0. 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/ITO102049798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cbb6738509e6063ce28ae72050ea9c0268ae707286d9b96eadb996ba2013bd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITO102049801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b7b4f6de63d6d84189178513c94eca8b422b00ef7ffa55514fc61af098717d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:39:21Z), 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/ITO102049803.
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