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 0x09352586dd603df7c3a4b1e84a2f61171ceb8cfa2004b3406c80d95af71e1326. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c9776b8-93cf-4233-8441-c774ad3edbd9.json and https://artists.proofprofile.net/proofs/artist/7c9776b8-93cf-4233-8441-c774ad3edbd9.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 0x965b0d843efa51563a32db8e0e8247a98b8023ea76c11b44af5ca1e8ee8a838d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CAWHO2031169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cd3cd7df4338c7d727d430bd74837cd9f92aaca363259f7fe868410acfd2a5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CAWHO2031174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19f68247e2fe7101bcda8740c36e63dce539b0ede597f074ecec4416a062e1c. 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/CAWHO2031176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd525cb2d36bb219930b112b480982ebed45e9c728f151e4f8043eb2cde7de835. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZP7F2102441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a40fb97342230e89f0fb427a762f56747c144a53d06125eed206f9f27e7d156. 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/AEA0D2103034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb717e1ee738586890c9d23ae612121031a8bd3325d850fcc542a05b77ba6ec96. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA0D2124773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452954820ca4c7d19c795399d344ad0c19de0d6daa0cffee8fa3232b05726f8f. 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/AEA0D2179874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38b719749430ba6c63b3aeddf0b18b05004ac65eb510b1834b2239ba54c797. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:51:43Z), 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/QMDA62183589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4643f8811b24615e1b6155c2df5cd4d34246e23ca34fc2c0159cbca6260b065d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:42Z), 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/QM4TW2215037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596ec27ac51b933084c02bf30d49f7f3bc757e63e3788b97042e6700f35d63f5. 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/RUA1D2548430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03c3a88bdbc21d6583424ac98fa50b3c41e001266b18da920d56d0607c259a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:27:17Z), 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/RUA1D2585869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e6973b2ab701c04736fe0864bce74427e78a5feb21bdc2722307cfe70af916. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/RUAGT2536713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1bc632dfce820986ed0db0168459b17360cc7e8baffc76e8943dca2e1ef8b5. 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/QZ5FN2304485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7803a563a14fb8bbc6936b1cfb9b533134ab154d4be85f56d97fbf4c926e5f5e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZ5FN2304523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4953ba3da4aa101bef3a7b734f254bdf7e86cfb19f80ab305a80dae3bcea169. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ5FN2304543.