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 0xe3f6201d28af8b5c6191caadf1eba7f20a48d17cd4acae09438fec0a34b68342. 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/3a9f39f6-9b80-4de6-99b0-4ee3e02c86b9.json and https://artists.proofprofile.net/proofs/artist/3a9f39f6-9b80-4de6-99b0-4ee3e02c86b9.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 0xae3869d9117b9d386e9c14363d280b6674e7ba1e0a3cc9170ecc250ce43ea9f1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMEN2541192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7434d1c3174310cad75b01a8a0469e485de59bb459ec6daac6b18fbfa789185. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEN2541198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa15e4e2cd98eceda1112a03441ca263603f3a1a4c22f414fadd20953d1d17fb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMEN2541197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cad846fb2fafa11efdebe67cf2d719907412875af945860ffc02b2c0748414. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZMEN2541195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721b89cde88be10e2264882056bdb065fcc03569dba2dde1dccf2c33c4feafd5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEN2541196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a6ee3e6ef74c659afb833d5900c20ddc3ba568710dabb6fb380e6c68ef9d0b. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZMEP2552000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dba8ba38ff55fa9378c28d48313d8042f35d0593c189d4f633a925f75480d90. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMEP2540544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022bdfd6b516cbf26abe5aa1be02735221c2c4dea3a38f6ef133a38731d3b78d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:24:00Z), 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/QZMEP2529326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe721f2bc68039b9df4ee0a7f0e07488be52cec4fe9cb5d2fdca69bd7228b7361. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:22:27Z), 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/QZMEP2538344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3865cf3fabe6feac955aa533ff90ecc63bab6aa2ff35247b574627b3cd0440. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEQ2500626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a5528daf5e85ee1c0e7c48831702613d837c66c8306a4eb5af22a8466ea4bf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEQ2500800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24529d0e66273dc95aba64a009e1c0af1384ee6e95436dc3c8b94b8bf1407753. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEQ2500718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19199e9070a2832af8946f7e661ef90353a9465c5fec7e548a663c6d9b43c10. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZMEQ2500668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc599aa5b6cf1711a58c107d2d99069e26c44d08c858b9ca0fd7b37fd0dec3ae8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:13:41Z), 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/QZMEQ2500820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ee4e91fb6cdfe5e3ce632c1af559dabaaa8fd5cf4ad0d3866e09a66bebeef2. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEQ2500596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecd4f4191965905c78fb63165ae5c20ced0588b54a3db50769cb1d36e09d86f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:25:46Z), 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/QZMEP2598815.