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 0xaab575cb810f3583322a64e7b2ab7fa485007a52fbbf667336cb49d841464a08. 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/96d8fbfc-3779-48bd-9b64-fb0f4aadabb7.json and https://artists.proofprofile.net/proofs/artist/96d8fbfc-3779-48bd-9b64-fb0f4aadabb7.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 0xab0dd6f7f166e58df1264887544f563c9d5df61c89f296a13b71a74e3eedf943. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6N2022512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d93dbd2add4ee393267b015415402b7cf39888b867cf2ca6e870260350c9b55. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DESY21401166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c372a33099edb6590a8a0e95e958561152f78a9d859fd036047596ce21f220. 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/US3DF2144910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ba27aa404e3700c13f3547c7cd0b2a00690abc77ec052a3411e6c0c0395442. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US3DF2144931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822f6c39805edd524e1f4fd0a9b7417466e2ffb2d6f33794a23a9dd75cdf30cd. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/US3DF2144934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23ecbcf07c9fc2242ae095e205d85e24240e4f2951ae750241376617b41b57b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/US3DF2144935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdadc856bff45a8cb5431a4ae18c7053a9274381d8c3e8f04e42bb654f328a4b. 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/US3DF2144937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb015553d6fb94e8d82af48f34dd0e7c797910fc32e6ce8a19d36d6d28deb5f07. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/US3DF2144940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3390645775dea6cd271ece50c441c881a86d77d66c3b963f8b5bb04a26b455e0. 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/US3DF2144941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6178dae5dbcf24410e952cd6472ce493aa2a4b0ad03f39dcbd14e7e11087dfde. 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/US3DF2144943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0426838c4032c7ee1ba16cddef2458392361bd6e0cc9c5ff52ec0b66478fcb3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US3DF2120749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41f7455fcf2f0496443bac7a0478c4006b96ec638fdc67025a57b64e347d96e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZS672149484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0cecf7cfdd2d887ae3f105c0aa6c93f1f4189916cb1e84816e86641923d1f0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZS662174075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2cc41c920c84dd712bf281029b22e77f4b5fdfc1ada4966bd57dd358277892. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTAX2236072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56d393bd701519f65c836bf140968fd2a0c215670f02ac8a463cfa1ad1dd726. 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/CAN112300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab929c1025ef316ad05d0616d5895333d70fb5b4c1bf8d2a4c88d42db4394c75. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CAN112300296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90189a8b83aa3aca580628988f155ad693e225facab9563d1110d3137235a7ba. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CAN112300779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc0ecf8672d4c80d9830dff0a06744a2cf33488d45d3096911f271466536ff6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CAN112300780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5231937e448ee635bbaee0b11e32292bd43ae0c1396a93f8ccbd535a1de51cb0. 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/CAN112300782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56d393bd701519f65c836bf140968fd2a0c215670f02ac8a463cfa1ad1dd726. 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/CAN112300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18056f7686b7630b25b7aa10a93a3f76035428cf95601bcedb9b49e1bc1ca2d9. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CAN112300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37559244318fab99f9ccd8e7336c038401ebb24aa663a644a409c66ba05c4a61. 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/CAN112300664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb88f4370e3708a5c72b6c43b6292f98c728e133467c5a18fbda984fd0f3f416. 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/CAN112302206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56d393bd701519f65c836bf140968fd2a0c215670f02ac8a463cfa1ad1dd726. 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/CAN112300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f645eae62a916fc8be404ec53dfd2babfcd4892436d74daaf69b04fe9c6f46. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CAN112400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb88f4370e3708a5c72b6c43b6292f98c728e133467c5a18fbda984fd0f3f416. 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/CAN112302206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2015052b2d343d4dc93c8ff24f0b97f62b9d182577df05ae8afce3813b2ade. 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/CAN112401493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2015052b2d343d4dc93c8ff24f0b97f62b9d182577df05ae8afce3813b2ade. 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/CAN112401493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2015052b2d343d4dc93c8ff24f0b97f62b9d182577df05ae8afce3813b2ade. 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/CAN112401493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec8bee2f2be2035f9f3f27c712f0b81fef21e7dea2b50a9fcb99a7c59374943. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CAN112501521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac4a382f4d6cdc3d9efc87cf03c63c518d2db5c9302908c368ba83fde3ace6e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CAN112501524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa8537da1f6067eab42183e8c35d1365f27adba4051fdc6e2979bfda9187ab8. 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/USWD12219924.