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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6a9808b4d022d76ce1af97af27fd338f37d5b4f8b6625b7143092f04824f48. 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/c44ccfa4-1803-4229-851c-d4fe13a8c462.json and https://artists.proofprofile.net/proofs/artist/c44ccfa4-1803-4229-851c-d4fe13a8c462.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeac424a06ea52f5fb0bd3c8bac1711fb7ea350e2108a54b281354b60fd32d3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX8KD2301043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c00d535ff93e4590629624ea296d029b988b09bf94bc26542759fe783de0a22. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:59:14Z), 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/GX8KD2315414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0f2877ba3c952fa2f5d1871b2141e846c4a07f20f68f25d065dd8c79ecf772. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GX8KD2373781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4458f13ec1950444b510ebeb305a4284df47af199a2d6f3c43d779cb3821b0. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GX8KD2320305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb446c1143fef4bb5dbbc11db72153cada30071ba67c48fc5c8504bfd7f06a7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX8KD2379955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb641760501ab482069e8a0542cca52234ec3d8de4c64d1ff9f7d3258b9e73fb. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:39Z), 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/GX8KD2320943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb865ed84307e3b4bc43f0813de71caa4e676a040adeb1dc6ed8fd34524e6dcf6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:54Z), 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/GX8KD2313897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919a885b96fd4822fc26a1147df5f8bdca7815555fc20cc25e6543e77e077570. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX8KD2315857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc4b2c6294575f5b1a92f26d798eb56a5fa85abc70d22f7c3e319f1996273cc. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:59Z), 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/GX8KD2334437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a2d961794978d11912775e3c78c9e46ec9f6b57ec504e38afa8806dd6accf4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX8KD2300477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cd601dfaa5011c724d93615beffa01b83cfc677c240c54c3c3bedcd4401151. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:32:11Z), 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/GX4R52359332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd587987d1556614baab021a18e636c4f5ef0594ff7c6afb28f8c10bd6c212b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX4R52305851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06ce9f98bf735c0c9fa39802d7315a2c95ec21b0e6184da9d97a7ec97299468. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX4R52357177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2663900a78b9e0c067fabeda05b07cc1a4452bfff5e4ce87b46b234e81a1c814. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX4R52383775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62cd2834d87ca788f652d65f3ca19b9e93c99c96a1b01c2c539e6e94cd25e71. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX4R52355788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd68bcbde13de1fd9852e8b2a8bdf5991d94a26c503e5bee4c40627246c1cee. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GX4R52306006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa030d65e94b17450f960e25ffeee1d9a35ce2ba3f81615788001e5a24f8b9e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX4R52368192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11eecaa9bfd44116fc9af69d1ec43498efa7f42849856e7e69e3891aa6ed882. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX4R52340028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355aa0edfbc6f2d7e9ee0565e6338521f14004009ad8d02d4b754055bb9a1efd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX4R52352008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8b751654f0d40b15bdb4fb0603b08f73a54576c04e17442c7cff24e78e1749. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:00:17Z), 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/GX4R52339714.