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 0x4e03c22bb3b9de0656d13fb53b656dafd84172bb216486b8cc97b390bbea1841. 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/a308ebf3-30ff-4294-93e6-6034eb3b1898.json and https://artists.proofprofile.net/proofs/artist/a308ebf3-30ff-4294-93e6-6034eb3b1898.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 0xc223cd0843e5997c03cf8a7996d098cc5e4141f76a8fe5bce2bfe058cb398570. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:06:31Z), 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/QZDA72599414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43230b489a480b8c35f7f84638c18037bd9dd41029a08c6428791a10db928fb6. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMER2597990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2ad1d24a3f7aae2cdf0f8e885e687c4d0ff1337a4ce3c62200e2b68fe387d7. 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/QZMER2597991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0063914f1b1eee9a184d045268f01ccdfadc5bf6b4c7d458c9ae4f695285e1e7. 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/QZMER2597992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f1c92e8b895d155e9967c9d890e5f469720fbd4785c27fdefe3515f9a1cfc8. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:37:33Z), 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/QZMER2597993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe99fa8c74ab80308e9265f589ac4cfa08f8a71382aa381a1ee5bbe2dc9c90. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWV2593399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6096df6e44d54348bfeb1ccf7d07d5848715798d8dea43995931b5a7c08a97a6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWY2581133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ddb0ce0f126c65f269f7c9201138c6580280026bb90b865c5125cbd98b60cd. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:08:03Z), 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/QZNWY2581134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaf309941c1c2b1baf5454aae678866e43df30c105c262854669a3da6c60091. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7X2532037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace60839b414712b0c00e268cf7b2d10614a5ff9c444eaef62e1bb145734aa71. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT3F22524720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d7f5d52914c486a8ef02caee74117d0550c2a6dd1726ffdc60ea276d569cd6. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:38:28Z), 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/QT3FE2509066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d641729220501e12a8025150cfd612a988896f0a74ff5eeee77d6c0c1f4030. 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/QT6EE2502547.