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 0x776c8f0cc18c0fa71613b144e5bb50847b787c46978936295f0e4d178038fccc. 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/aed97604-3884-41e2-8f05-58be7ac778a3.json and https://artists.proofprofile.net/proofs/artist/aed97604-3884-41e2-8f05-58be7ac778a3.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 0x2ddb458fe6ffb47882218d47d1a4706617594ba8b03f6013f29495e2f80a8c69. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZTB32374179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb477ea7c358e8f247e0aa475abd57b1a27d5115a3f189a1ff4ddd07ca6302eed. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZTB32374186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639282da98ebaca146047ad7b6534a414abd6debe92e2887ca2e02f3b9a9aaf1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWFM2316935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987f123ab6fe02beb3b62520b27b42697c41bebc0d612233b071fbcf7ee17e79. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZWFM2325018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65735917f9890aba8246cac4b80dc775a2feb56d89c6bd096ad8ed35cca23fbd. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZFZ42443827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d1d6fa7a779b606e25ca5f99f79833782fbe1438f4800a6396a5fc953448bf. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZHN32406901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda51023c20618212f878f4fcccfe4ca3811010f47be522f58805d17a7c7f4025. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHNC2425711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e24fdae602448b80b0d3ece56c039ed2fa00ce7e922809c6b1b06ac063f481. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHNC2489610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe149eaaa651fe64de6ecc208eed4c663f502d8173a8719690769028b9c3a12a3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6P2418447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034c3ad31533bd6f821d44cb5c405dee5db75b3c7049f935cb286f5a8ce3dd7a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6N2450666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de50268ffe749d8a8c63de3ca1a798339aa7cce21a6089d7087b93cc0521fdf. 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/QZK6M2423393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb12e217654373760e73e654754babfc061d3d02ed7d5c223420638b8e464e49. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZK6N2497903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c14f5abbe088025169776fc35806647758543ef7bfad837c71ab5d1c8bdc5f. 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/QZK6K2444856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ecd711c808d5929d118e7fcfe5e3740bf9caca76d3d9fc83d8c92576bba359. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZK6G2419265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f2aacaa0c4d1e4d7d850b5f0db8e6136b2af347ced10275d415a8e36047ea2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZMEN2444812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894c6aac94df0fcb2671e17f5871fba760ac23a2132188cc7b9fca6bf83f3194. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWY2446915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2834cef34c9006e45fec75908705ea8ad20529135d0b1d88e720060ee1a2bef. 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/QZRP42423163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4243e6b812d02a07d41ab11f5f48a93bd247cdaadf315fd43063ed0bfb1a85ee. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZRP42463881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9b7fa21c458ae356261d10fa7b92086e9ef11d35d180273161c5479384a19a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZRP52425740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e44444a35dbd2082fe87942288f174ffa5b5910bff192ca2e7e67019fd5bc96. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAS2401275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4088ff1d4a40b9145fda5a69436f4ea6a95a22c09eb9c7be26fc2de4bc1687e6. 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/QZDA72589361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9948025fb561f2df937b15bc80602f654f6c47d0b20198d166569a7622d74660. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA72593740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebc15a08b1fdcd18840a9fda613407de0a7c39567fb4b526996d3be31177434. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA72591979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ef408379f404ebf63738ee4679a8dbf6bf4846763d8f08c186e831ca05bf91. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZES62549686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695f87ef40b7aae0b29e6f39f1b753a407fa865b994f9591cffbbab0985f9ed3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES62530301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f1a0ca2019d84be73ab2255ccba6c0fef45555506b28cdbdcbd9165956520. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES72517320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4eb019660b3a0f7740f96446de3aa257058572ff323765f9c27cea0f4475c8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES82539911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8df063cd7e5f001963550bd1e546fe6b454f91914e4ac36e55ba6ec021da2b4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZES82535791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663fb899b84de6d96bfe8f4c1e4557ee3108633b9f43d1f85d782fb49d77540e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZES92596644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbadf00b9b9820250e35fd2d0c80f6b40d6a723193e676cc27659602db5711bf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN32587276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b16947da86e11fce664016e4254651bb6a8a5946d8f9984eed8b4635e1931d1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN42587769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1b0732b0f20caf3887cf173254ed6ed359fc1738651e9897841e0e15d62a99. 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/QZHN62507290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc423c7633f2fde095ffd8856b30f0c7946831f867ff8ae828327760e6a1a56ef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN62560679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6b48463a963f0e8304be1b58d7c20250c78a22bbe892576e097534d9d9e358. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA82513602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4c4fd29dc168f25dde9805129929408a0e1d76244b9c84149152ddf6853db1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN92525049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03afecb3d21db6bc7f21cfbec3d28f88ba8e41dbea87614890b3995302acb38c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNWU2554838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde86fb9b2c62789f55e60ad3736bcc9dad8bd00e062d199e56d97409b8f0861e. 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/QZNWZ2540806.