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 0x698e87f4e307ca518f473e3d485d994253f0ce804ba0d403b4f11ab10db538ad. Chain 2 (Bitcoin): anchored in block 953958 (2026-06-16T14:52:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2657864d-84c8-46e6-abaa-59c3b63ba1df.json and https://artists.proofprofile.net/proofs/artist/2657864d-84c8-46e6-abaa-59c3b63ba1df.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 0x52ac690f520480a4b8eccadf454ea7d538943c60739b841a77869227975a9176. 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/USDY42431467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc156108dd43835625e2fcd2dff34fcabaa0ca2d5bb57f571b0d66cdb6d430b. 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/USDY42431468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75924e000c32e6e230434e1f0fd6563c2e712df1dfddd0c4c58b670d44b0cb33. 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/USDY42431472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d389a418d3eb6c36cf669233cf99eed5f8f2787da4e2f48d7d5ab2e5d2f876. 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/USDY42431475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835baf745a055b7c0c1985fbdfa3ad4aef5edec8255b2902219e0397ba155795. 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/USDY42431477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa176d24a7d69ab8763202e1ec195766f5114e6517740f0c1ae52d77a4dff3155. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USDY42431476.
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 0xca36fd96e16f9a7379527d3d5099e3dd3eb6bdf24758c75b9aea76fef6ff38df. 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/QZK6P2480914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a11c766207f8b797ee620a9b646c4569e9e60212c612837f1955177db644cd. 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/QZK6P2480916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b185f7c4b0e4e28d678f1a2c5889e38b564102406d71420df581dc86e69533. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6P2480918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08b61216c2046fb7fe0e194df789de9d4f459a41913fc8489efa040dcae058a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6P2480920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635c5f204d06c1dc67105d51717586d85ede775cf3a3410f2a6c0349f1a8e69d. 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/QZK6P2480921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810652bf54288846d3415b0ebfdff18adb6007d2c3ba5c1ab524953533c9c38f. 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/QZK6P2480922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae5da53339d15579e5d4d855d367d920fcb3c0182dcab9da159ddf9b04d2507. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZK6P2480919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef00e565511e2af0744f8120d2ceef07e98b80fe3d2c47092e45081382fcb197. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZK6P2480923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c4fa7010b52f33a0efecd7cae80587e7f7adef7e95c9ae14237da7472d8359. 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/QZDA72331727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7920d1c369c1f0887266f89a031fe363e2c1cf357285f8f3f8a77606ed0db5ec. 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/QZPLR2281629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0b32e83800245d5e28805d0bf7bb6c017e4a7185c8f93cfe9762514cdf4f40. 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/QZK6K2294034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a867df1d2555d9d13ba0b7a39af21df0c9fa721bbd4b8bc34d507d1b5d9a6b2. 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/QM7282341399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed133e47ba57370a798c97530757b3c48bf9f61fbe3c7ba7f0fb84e2bd18c5f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG2443927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ad4e738de0af387d03e71ae4be9be73c2d2cfe3f50ca079114382d4df56fc3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG2443928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0d45dc95c4c9410e1e065c0367943e6c7571b0fa29fe7ec40d50676038d4d3. 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/QM7282341406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443986b2eb6b94e3103411ddc6e7bc0537ee6ce4296e40c99ada8a96c6c650d6. 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/QZW9M2344511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466ba3918981af8cf1fc128af93747d4cf32aa27cafeda86aad3d8d0423b95d1. 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/QZW9M2344512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca21eb70e9b45bcee7b241c123ec2ed4d7fb2e3d7a0cc716789a1ff58975f0d1. 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/QZW9M2344514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b56dbf4072fd0592b50c755bc7ace42d0d6a0f3c444c404b7d52ed59c516943. 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/QZW9M2344515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1116edb28c6c19a8191e95423ba04da4b861adef25cb4f22ea8e699eb084d8c1. 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/QZW9M2344518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c45e60c50f70d6050d3fd80f463c533bec62c833679117027aefb08f1180869. 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/QZK6P2240563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419fa28e339763bffc6e8ad338080fb891db8f77cbbfc1f8147ff63d867fbaa9. 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/QZK6P2240565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033bc9dabb883c6a5c0b18535a8b55812c5b338f4d9e255a20e5c9438ae1e8f4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6P2240569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8df7e0b3f51118896fe7206c62cbeaa2ac470cf4370ee77b6ece973041efd8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6P2240570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ece4634e878bfb6c80cbf3cae6ef3d8edee51fc584c34e7f04d6a3c0549efeb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZK6P2240564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6626bb13225c3cf5ceebeccc766e92c67d8c263e195d08d9732ae6cbf8e774. 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/QZES82423152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145b6474a9ccdec8cc794dd5908eb6c061f2dc1b5139630f1afec133f1be3288. 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/QZES82423158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62758814660e924dbde1db53d824cbd0b9d9b824c2a1b9eb95435650162fe2a9. 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/QZES82423161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd9bac5a34498e72fca0d608dc65119bf9c1b7f46a0c20076ee1790ebc941be. 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/QMDA62305802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3324d60d73543dab231beeb83560ca2b57aaa226b4f19bbf4e8563a1097dbc. 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/QM6P42595684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832e8d0a83f985ee5a6b9ae2fb1e63f1b338c802bc1e5b646135622e7651437e. 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/QZMEM2567691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152ec68b5d7401d212984cfd8e7a03afe645673c29ca58583a53f2369ce08cf9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QT3EY2403570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadb6b922638f1af2f0a8d33dbaf46ae747ef448c60e376ea1a2ae1aa58aa2f3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QT3EY2403571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0f7dfa406687c7b7aaacfab4bf74938f858609efd1d400f6c3003a820a9c32. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAJC2484331.