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 0xa73a916dd00294a543eb29ebad5a6f6f916ba7b5f837c1ebef36194538af5bfd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bbaec50-f059-4d6c-bfc6-8b4e6eb96597.json and https://artists.proofprofile.net/proofs/artist/1bbaec50-f059-4d6c-bfc6-8b4e6eb96597.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 0x33bca08123b1a18be62b610338acde8ced3a1750ec65de52d0625e2d115404a6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTV32368232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2b5497ab9794e1dfddb001325281ad7cbd968e43077dcf2b0ae84014b5ea68. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDE2398785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceac79633dac1fd9f4fa9c17faf61f1520296318479913e35aa851216c72ce0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTRX2395793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c5349a51338b29d56dc157b2ebf1b56c671b37fdf0483099b7e8ff95c5efcd. 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/QZWDE2398789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c143fd512b04fb2f3fb6771a66dc213c0e74b2732c12b51d44f330448d1498c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBRKQ2334979.
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 0x43ca30d05a6011df12311d0815ae5a26dcb6c3cd6389ab35ff739fdbbcdbbfe1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLS2184606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75c103b2a867276e30b45a930c714e7455460f03fc176c086fd8b348d46b231. 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/US7VG2102800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ce139faf48bcd61072c8ad795ce669a5e12533e4b7a10b77390e92e486e381. 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/GBWUL2159466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b401e1372af5c3265aefdfb90df0759010cc96c331082b3ff864f750c69030a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJW2081478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca207a6a2bd68d1aabff1696f7ff775f48d138b300f767a01aa1355d37976f0f. 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/GBWUL2161892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d58e4470cc8b151c21bcd2106c7eedc1b9262ef3e40bd41d211a988568d95a8. 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/GBWUL2161897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528b9f2ea82e17eadcb7da99aab078b2b6434127f546450ecd0190d8d454a41e. 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/GBWUL2162872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe84287e451b2ec86c39693e71a2e17cc752918ab50f22aff0c396ec3a6338b. 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/GBWUL2162909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580a58e4f0370b551d724b36e161185a32e9243b9e67ede4f92a0f8d2e8fe4d2. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GBWUL2159101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc9a036a1e0f605b98fce7f70f3b8cac6f39011409e041fa0f236c35cef1480. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHZ52151152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9909e0986d38a898162b58598283d1e570dc15b29c72b304d025b21c82809b6a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBWUL2159412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd5803066f2880d2e3c76e42a6347dfccf5e6b6a21f6102633a9ac37db59ade. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBWUL2161833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c4231ddc1b83579bac865fb77306936f8ea3a1af7401f570c4b89a5af5521b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBWUL2162881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b3b958596ffdaefc71820a949ed7b26a428e01dd993cfffb85ba349182f345. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBWUL2162896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc752d81ca8f85f74a84dd034fee8ffbc4f36ef50a77c289389298c516569dc6. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBWUL2162906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4285c500b3605dd490f8d770e2d2f7ce5341d2e87773afeab1e31845438148. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTBC2446221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b43973452448bbc936eb4d6869c10c79e32891602413e6f786661773a321f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX3HH2489522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b4b0406cd7d70a2b1f5f74e8b85ece3835399408bff93ac62454ed7b7b710f. 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/QZWV32411496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827b896d5edb47acf20fb42aac51135af47c93adb18fa685b96b57ce7414d553. 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/QZWDD2444781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350e8b85629d69616a2df4036865ce47b63d0a0efdf6a22dd169a85c1b171be2. 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/QZWDE2408110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd100d802ddc59f00bce8c551f605e99a9c12901e04a0276020cb25ba6c6a646d. 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/QZK6N2430856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e961c5545f15da8cd01035cd4718aeebca25b2195dcdae64691f8388434ab9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHNB2415645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307fa1437d2ec1e427326e0325b3e4c5c9c1a735d968be15dbd8e5f526da422a. 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/QZ5FN2417974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5421e520216bb7451f0803c4695bbf08d6e9a23e0f1cedbf82999a1f7ac024e1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA82489835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397177d582ac9ef963f5d5fc02840288f0e7a332c798547c1429b9f7ee26bf78. 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/QZW9M2314400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb25f279c2677cde3023c2f8f717d03e178accf03844e6b0a47ff91a26a24d40. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWDE2401600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efa38a5dd9e045fc69e2dbefea028486ca8568f85b05a684773035d40471123. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/GX3HH2459529.