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 0xe37340d07af908f21d0b52e007087cd4406e2651bd1f17b01cbb82411f2774f6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3b2ecc0-9a0f-42b2-9a30-b3c73b06223b.json and https://artists.proofprofile.net/proofs/artist/a3b2ecc0-9a0f-42b2-9a30-b3c73b06223b.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 0xe05e058669920001739156b59c91fa97eae659b06ab25677422147ae191a3f3e. 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/CAA501026901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af7a3ceeaf5e14a773d62c8c9cdce75dfaf311adc7abb220e4b4d9ff993f967. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/CAA501026902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0c06900d61183dc3ded21967c7791c021e5db48ff8702179c77abbf533cdb7. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CAA501026903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d58b78118b11963ac567f9478b29e47ca2bdc3493d50652ffdb58cf2ad1a65. 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/CAA501026904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e70b79e1e6bbef0856befe6eb10b70b182492d5283acf52c982c7fc2323ea45. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:33:31Z), 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/CAA501026906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a06bae714376eeecc5e2a0c08643b40fafa837284553f026d5b03d4c2b3a7a4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CAA501026907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ec191cc7e79cc7c41cfcebeba48344d4126716a948424eae360c378575b2ba. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAA501026908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91afc9df92fe0b0ece0be6c8f0157c651e0ca5eb4d5e1d775094ecb71d04c317. 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/CAA501026910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c24bdac04ee4575977857f9f3fec5294c8e0c6e62713671682889ef674b88b9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAA501737709.
Mausam & Escape (From Slumdog Millionaire")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d8fd3d2eed268e3419ed400755d9cbe0756022dd6bb5cc05945a19193c827c. 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/CAA501737710.