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 0x314773afe6babe452c5de3dedfa032255cf2a2b45c38d883e7723341ca883062. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/092ccab7-718a-436b-813a-1b5d4d0f5b89.json and https://artists.proofprofile.net/proofs/artist/092ccab7-718a-436b-813a-1b5d4d0f5b89.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 0xd883b1dfce6fd0067f332c1e94b43964f2f1c9aacc151698b6bee215044ed7f2. 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/QZWFX2464609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288d3177140254bae87c15a8394f354e23a4f351edf2e22f68f476ace20d305. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZWFX2464612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52747206be0fd61d4e056fe4adc3332faa3a169661a03f6b0dddee31b7609f76. 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/QT3EX2456159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e100b8ee8baeeb0045942e10042b203b1bf7f956f140efb1d169100ac6bdc8b. 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/QT3EX2456161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1c4eb505c64e4fb5020a17afd2879b9a3b0900d65788aa7f1def4cbb1d78f7. 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/QT3EX2456162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc335d7f599e49345275b3aa7b9144490d311c2dfe5e61cf0c7a000ab251344. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QT3EX2456163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76e0d4938b1882c1d24587be1ca1b9c2504f8d9364e2dd1d3dfa3df853f2c5a. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZES52533801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02fc490a83acde1e4fb99ece9d8ad2981c0feb2ac69485548abf3e68a1d7bd7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZES52533802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b80275522207647f86ddd2bc6cd5ac6a332cf0f3e6670e3339ab6b25c20f30. 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/QZES52533803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e062d1998100536f5d08a21e61e10026cb9ae259f15bba3bdd549f4bba382b3. 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/QZES52533804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d42fe14a6eef55a786da1222e28d2eb50d037124fe69ece8662454849509ee. 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/QZES52533805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6391aa33e4380d7f00d80e9e6b250bc245d39c6a43c447fe06648e8cc2dbe8. 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/QZHNC2563751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88866aa401e8a263552031d373cfd96d4605d63c322c564b9fbde69fbe3d648. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZHNC2563752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0831f4bc6f2eb1d34a0dfeec6577ac8e57ad93a5209df39992edd23ffac2c25f. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZHNC2563753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6dd58cd7a5b903982d93da14d1b47dff487526d1c0530fe05567e072b724a7. 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/QZHNC2563754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6943c23a7ed853d91bef769b10d3c08040890c52b0109b66759f41c43a563529. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZHNC2563755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a1ee6825cf098e95931c2d6e5918443a8b20463f6326593f1c48f82cd68284. 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/QZTAZ2516876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2827546d2162d25d8484ee9d9a6d35b719573c8d3ad4a76c56a821564355a6b4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZTAZ2516877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f5eecf4f380231247a420cac4776efb6bab195356ad0b407e97fcfd095b87. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZTAZ2516878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737f9f3aef38d2259fd8f4486a518a10a788b0a75ec52f463d8876b723c8d798. 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/QZTAZ2516879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65a5214400fd7e6fa5d2d1cb08449c1c3fb7036fd2c4820add28a1b869080c2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZTAZ2516880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5df80b7f7279cb5e377c23f866f5ed73599d07ecf062ba098168f721bf73477. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFH2543555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3382833681227dae24d7e8f228f5b9f8b676d7106b7fc47f6b08bc0128b6bc. 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/QZWFH2543556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5c3b022a20574a65d81ff4e42cb3d22519c9448d892bdd8a10e3769039b494. 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/QZWFH2543557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d210389392a4ba8c0099c23abb1c17156e7767e74f6c7c34d7dfa3482cbf1f. 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/QZWFH2543558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701ae1d3c0f7afb0a72861494d75071ec76ba856276d5680499b0c1273c8dac7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFH2543559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f888a2ca1b5d13009734e55d8b994f0f8923dc58a13a2bffcbb83ff94f07b1b. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZZ7W2590592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd041468cc7338a28b29fdcbcc72ccb9543b59ca0923f1cf847d66cf9b5673d0. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZZ7W2590593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af0557da87b22a1f552b11dee756010d57c3cafd71dd9a493cff8b034cebd05. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZZ7W2590594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f38ac110d151c2c291d5d72747deffac2f8d9ab5490ebb2e1f5eb7bfa80e04. 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/QZZ7W2590595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acf1cd1a251f1413a444f664ee4fe5daf4a7574ac3966c46c3f12acd7cbd83f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZZ7W2590596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592c6aedc9d472998a09b75010175608e1b112ec37108706ff9a188276a21e83. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZZ7W2590597.