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 0xdb0e21ba0422595af88a5185f2c17d6072521e9cf8cd2442cda40937fe3202af. 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/6a269b5d-eb06-462e-8b03-70a6202299af.json and https://artists.proofprofile.net/proofs/artist/6a269b5d-eb06-462e-8b03-70a6202299af.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 0x83ee5f4e9fb2b1f0b42b213c61d74d706ef97ea4eef09258f41e50258892c961. 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/QT3EZ2415179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb975c7ca11b489cb91786f4928113e2efa66b25de2d8e2ddda71d54be96ef286. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QT3EZ2415180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ecfda4986413d9060166018b40c1e66cb8657f7e2e616bbc6cb5d8906b0b19. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3EZ2415183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4ebd53efb45ed37e12f0b254d6fce4e4dc0dedd51b16058e689bb44ff07183. 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/QZFYY2556169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38df1376003ff73f3bc6287c14ed7fce30ea34c2c36b88a5abf99eac1fdfe791. 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/QZFYY2556171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31677d7aab13ca3b6ecbf50eef8cdac60201f8f00d8a6cfa810d3220beddec64. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFZ72539866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958fff04b65fc829dfbb56bffe871b12b0698ec7277e0b0f13f81c0f76222ddd. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFZ72539875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc099eac746b2f05a4f2ea4bbb8a204911fe2a71fd9ccf552692402f9cbb9ff95. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZHN32550050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca403653211e9ef757120d30a9b311593cdea0e6c31cafdd629a30fa462ad6d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHN32550043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28dfb069a5b4d4249f4d8c691733279daff72a117ce233dc8b86131c839e385. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN32550044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26af39d0367af06e91e9c4b20c8c069aa30c98cef47e888b3d59d68a5c148f61. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZHN32550045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eecad2799e79f2bc7bd7b97ae386b5e2abffca63b74f1c7299a601e330ae3a9. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN32550046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dccfb3fd8af481e98f01c47728bbe2b01167f9cc23acf7857265e29ba43ff7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHN32550047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fc16f709ce8f8539602a1da334747f8c0678df3432d07df097b21e6022f77f. 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/QZHN32550048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b093bd52319747b1fc38e3bf6ad861ca42a434bd9a41d8525fdfd24e1d8a57. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN32550049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc099eac746b2f05a4f2ea4bbb8a204911fe2a71fd9ccf552692402f9cbb9ff95. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN32550050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb55f1cf9d38f1a884b2edba1abaac5857e829475c6d6ac66424ca3132fe62d1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN32550051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68f1e55c73534aa19f7a4742c6ed44731ab3f55b3856362b4220e9b43588c4b. 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/QZHN32550052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2378615e7aa296162b0743f36944c221bed36809ceceeb5d1d75dd9d1b7c2aa6. 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/QZHN32550053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8acae77d0fc0ecad95f25003bc3bf428f9af88c5597c935424a76f9c85221b. 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/QZZ7S2503276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8c02c401eb8a0e684b5b8d98f111f04bd0c8b01bd28c76a525d0088a720a05. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZZ7S2503277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b91d178291b87985adc0228d09c6a4dad29a31fc72de55185170634ef77be6d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7S2503278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05fe0f29f22353db9a1edfcd89312ab997d3195eab3671df4d8dc9e0ffdb51c. 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/QZZ7S2503279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1028d6020a6a4459156091830fea17da9684bb00b7b21cdd901dec6dc140d094. 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/QZZ7S2503280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64781b0be576441c349b6554258f1a81a4099f2b09e4d4a8718feb8987bb158. 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/QZZ7S2503281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60383772cf5a793a408b0726f1f642081efc3f27fa895d5c741a4454534e78e3. 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/QZZ7S2503282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f5776fe03ee9de77bfdafb607d2087275764dc21839860b40019cff030cf5f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZZ7S2503283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ba2607092ab09121d6a20f403cc5ffd20062bd8119452ebb4b7c2b431e60bd. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZZ7S2503284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65335d7eb2b30733f1a55aac8e837f5308d4a43a410388bf9fef70681e458fde. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7S2503285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59bb9696f7be2dc36c4d47ce9184e9b6db54d5185673c145fcb59afe167387c. 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/QZZ7S2503286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eea7745b8e66d70dc4fce7459b557e5ffb32be4d4784cba78b568244d2bbbc. 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/QZZ7S2503287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edbdd937fcdd3b92500bb50f6dbd187c8765679c179116e079eea79524f319c. 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/QZZ7S2503288.