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 0xa9954729e7ee25c077cfb297fed41ebe709732700fd73b47f542cc3adb987d6e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51f49968-3dfb-4524-acd9-7f71ca2c8edb.json and https://artists.proofprofile.net/proofs/artist/51f49968-3dfb-4524-acd9-7f71ca2c8edb.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 0x6314345863dbedc069604ff67965afe843b0165b1b340273af74ce0ef5293ad0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNM691900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda405114dad7a99d0d5861d24f057f8d4d862fb694f9d69cb76df0e165d8b254. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CNM691900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7cec1ac94e649e9919c2499582a764cac73f5e43b1730dc8c30cb3f385bc42. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CNM691900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b54a0b6bf25383779fff878f1e7bef0281382cb9cc2998d376d688adfba3b5. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/CNM691900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b10fa56c041f5037c3613fa655563d62cec1d1ec1ee5e9be70ce62bb503d35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNM691900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad1800a5bd7f75fbcb05b8efd9117ab1b7e5adac1eedc301dba8daaf14bcd11. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNM691900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9852849b322e9dc755af59759d4cb5b1d9f27fb7bfc3d5ac1da64d23d26dbd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CNM691900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ee7c9f1a1dd9adf608033c6751f7273ed4a700cc0e2efd0d172080c8f92a78. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CNM691900009.
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 0xabb1c3a9ea4c1aebf81df1f4957376e5de5427016cfc226a901aac8c2b4c2542. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CNM691900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a75c8f3a2de683d941df75f4a5d186ec71fe48af59d67fc64c95669b13f7e1. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CNM691900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39a64d7af6c9e1d126956c4848a3a772f12e6764e734622f5518c2adafbcd05. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CNM691900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1dc8cd58c3dc743f1de9bf9681c684726e7533baf51b43903f9a8e419da333. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CNM691900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af77b6aa65dbe628b5e45c4f11142c1ba0f6162bb407c41d8077770ba3febe4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CNM691900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7538b3053f11da1862e68b357be39368885104e81c4832e8f72a29e3b8f3db. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CNM691900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93958b8f84946b8904337f435f52c447e8f58c205288e1ee372f2bd744763890. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CNM691900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac1fb56fc0573c00789f5f99e21d7621c7ee8659f57030c3ff36fe22cb6d9ff. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CNM691900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a48acad21c7606361afaf433940d22fea5ab8f973f7e3f6dcaef36aec1b5f3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CNM691900020.