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 0xce7d3adf40f6184e95a44ec0d59668c8283e9fd2460d35197e7a9c17ed6cca5b. 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/e2448a1b-d96a-410e-9183-063a7101a724.json and https://artists.proofprofile.net/proofs/artist/e2448a1b-d96a-410e-9183-063a7101a724.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 0x0aff631412a0f436710381b188bdcdf4fa6ceba55d3b2672f145d4534f5f2d63. 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/US3DF2011587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9184de7e3510d96a2c02267fb427b7aae1794f550b4b1607f98d5ff2c28a239. 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/QM3DF2003144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb24c2a197698cf3a0ddcb385b1431846c43a904d81b7a8cae16dc6a249bca3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USANG2152557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d547e7130b1cba73dfb172a3077e9a44ba58a8f7cfc3e6f1a92311e8e77e89. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USANG2152558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fee51049d5f2598c5af2c41e77619eb0219eb0eb121f0129cabccb8858db28. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USANG2152559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede2d85222bfe194e86eab3142731cfdff534a22331b33855e61f3ec568cdeeb. 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/USANG2152562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe838d04a448c200e2202e15c9b504ebf8dcb4307fb4539ab00b25f9eb9433666. 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/USANG2152566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24c9f23502b94b9ef21da5722448a7a66380cd1359e6b85daaf436f27b0f05c. 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/US3DF2298629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70b9a365e176627d2d0e920a9d5e284ab5cea4daf31aa1288f71ae2b11d09b3. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/US3DF2298633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d225853fe1074a66946253f26027c89eb4218fc80a84f1759ddfb88f16073d7. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/US3DF2298635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7a17576a7584e1ac6373def64b6e2ebca9d03efd59b12cf136b98c61f8bf2f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US3DF2298637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f2d2015fee24cd4a32a8c543702b67975723462bf1527578d303c7cdada30. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMANG2231878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb865d56b520f9230fef6cceb5470bd2270810d42fa4269c3e581a69608c2f09d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMANG2239941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac4483b09b33c78d184bb948649f84b6d7dfca7a5469bfbeaee05e49d51521. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QMANG2239943.
What Greater Gift than the Love of a Cat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b3e9d572ca27746a2d5518328955db24ba48ca4bda6dd851624b2b913d9a12. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMANG2239944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940f6bfec91fdc653861099f009aed21196ac8666c0f50a98c3dc290f34d9111. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QMANG2239945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe170d201d87fe80e89cda999a1271bdfeb875de145806057f5fac8ae95306359. 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/QMANG2239940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92d4932b3413dd24b4922880338221e1a6655969359c089de05c0c30091b5e2. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QMANG2239947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9271d0b3e088bf8b3973391c8e4ab0fc4ff3f941f54bddabf60ff7c7bb37c986. 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/QMANG2239950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3196e90587dde733cf302f1cfe1eead70dbeb31dbaf588c3bfb72b57903c9ed6. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/QMANG2239951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7179735551480a03f175be99b9e0eda09bf7d9ce7130affaa97e8235691538a0. 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/US3DF2409218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fae04011c9f2434ab6a62b8e45ba3ff8ad8f70751204c109d8585c10c62c6e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US3DF2414133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25bb09d416b087ee2dc053f82769528830191e0135470f8fa1f75ff6fae6fd4. 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/US3DF2451952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02a4e788e89771bd1a4a5839591de3b28bbeec19b83047737b5f1d0290080b6. 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/US3DF2452001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863ccb4f25711c36c8534128cfc988fcb7cf9d022c55c13025b6ffe0438d8599. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USANG2433448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cc869de1526106e131fdd8664a11e9f0b93f8ecffa29375b0ceb7b3d2d191a. 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/USANG2433449.
Big Eyes, Sleek Fur, and Graceful Movements
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7729255a6c3fda92cc1a113089516611f9c5b583d0e5d4b7befb67b8e7c7720e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USANG2439000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b1347e2100597e353182115a059b60cf75d95e55aa5eb622c0c14e43eefeb0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USANG2438997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c33ab5774c7898a6a86a1bb20ce30e7043d97cd1bc7b00656991d6755afcd2. 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/USANG2441460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d6d8a32d0ddf6c50cbb3071af745cd48f79b4acf2c2e3466873eca892e86ab. 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/QM3DF2419338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a44b79c8c3abc511d4bf3f04793f2d74a39ffb6c70f6a44560c1ec53b261e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3DF2504565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ffcad79871e2000ab1ac6334a4055b8fdaef7e114bd000ed9192959be66850. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3DF2504890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9e9d686b13e094dd42e061912ed2cd27c7a8dd6f0c445462608af925eb8161. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/US3DF2510915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3868caa12b3be590ed37c5133eca0a3e04726cd906f17dc4f7e7fb7bf76169a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US3DF2510918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7536019de7acd48d8479e40888ff1b7579264feb627b247433946dcae65268f3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USANG2508067.