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 0x088e70b6b7c27b0a23f70c265cdb079e32bfbd460c45e220979703297a320a88. 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/1a077701-9a21-4498-b347-bd1b447d4306.json and https://artists.proofprofile.net/proofs/artist/1a077701-9a21-4498-b347-bd1b447d4306.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 0x01ec41a2376aa890466b6cabe7a56ddd1961a49887d4383d79e46305c7c114fd. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCAEG1927364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd1a88447385d4d5f7d672f5de883dabe169a3ec161a511d4847a7c779d49c9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAFA2060592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5a3c7ae4565eb03a12f04c47b6f0deb1201f738fae696acb3aa4f54ed316c5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFA2060609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c84946b9a01faece618d770f11612b4ae053eeb02ef783d0189a1a47554d3e. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCAFI2188481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99cd2f955daed5629a222e2d929d59c112c9906a0b5d3c6d09e76025f1eeb97. 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/TCAFM2174548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01f25c92ecbc596fa8df8ee9deb4b12bfc98e28da7e6d66b2a627627f26da82. 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/TCAFT2194050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bf1d1c09b1be49ce4eb994aee2e884bc16d7560566ce19810f98327e454f6c. 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/TCAGC2284102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4dbe2d4f812ab948b002427a78b3975673f48e49f3018ab14cc91dd34f7c8c. 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/TCAGK2269517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339edeaf66bdbe1c918e9bf0c2c86469ed041b6f189ba44769d3c17ea6da7a96. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHL2362767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df8df7e5b44bcb002b1dc567ad52786b493ad59e129ad626a4bd48382065828. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHN2317121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f0f606cbf8d5ea6662b4bed00720a093d62e8727c9a484affdba3ecea66abe. 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/TCAHN2317161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6757e45a25d8766401d949cf39c1e018d3d9d57a917f34072b6e5cc3c458ba16. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAHN2317186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76eb721fb69773ddf4eb8e97512fae63c4ece442fc727492a265f15604b83b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAHN2317209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eff1c0f543eb7a8e3eb88a1dcdce0da2ad210d36bdfb4805198d70b7b65e41. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAHN2317216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d7b9e9c106a343a27faa1bb4381f253075d73c38bece3393a2c337bc29bca8. 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/TCAHN2317221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cf1d5d596ce4b706b86927f28adb986ffb04e197e5fe24881162960f39712a. 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/TCAGZ2318958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2c78aa7d66891798321240bd62111d79bec1087a4005c2a50ebc8967ffd73d. 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/TCAHO2308278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3adfe7a037a32c82812a9a032d7a555369541ffabda097a1b1da3f993e18f1. 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/TCAHO2308305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7752e5a05b91b3e189062b009e49419bc36dce6feaa3a761fef62f43b830d3. 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/TCAHO2308319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde53a36c3070c56f41ef62c6f75c54b8236a7faef54e26d4b72124b406b8178. 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/TCAHO2308335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5070c080593d46fed4130d98f549c8f881306ff671372a461cb17f1e0a04cf09. 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/TCAHO2308361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbd0b2e38b12ba99f4878cf76e4771f881ec918986d7d69e640f00e9d375506. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAHO2308372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef654da8c65dcf4cdfaf3565afcbac37c41389325f6b3f5c8ef8e181b3ff04e. 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/TCAHO2308384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2c9176a093e162316dfddb55e3d85d7b2b9d44d328451a5fc4a1b2e8544a2a. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TCAHO2308454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ba5d6ffefcc134c74dcba4bae237da544a24c900b64087113b526d8414c75b. 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/TCAHY2428970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a04eb28cd2ad1142c1706af26694600cdc541e67866942c3db51c24d6d2354. 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/TCAID2473274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a088fbeea06404cd35942c2fe62cda809c5ab7225675a9e1503f97c41a3fcf2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TCAIM2452657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba0f1db1bd5635339cf7afb4d3a7ae749276e17cb3633a689d89c7044f781e9. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TCAIQ2429442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7cc7561e1c60ea557f3d8bcde7d7efc7ce43d8710b7c75304ac2de522f8e3c. 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/TCAJG2538592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb8891c3c07c4ca1323dcdfeb366a788525c912fc76b5958f2d1dca7b4e1812. 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/TCAJL2554607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c288fac4e9a5e7c80cd1742c83a9282c9d96246f013f06063322f3cd4c6b121. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USUYG1524368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde416cd178927e2892751ebb1fbfcd5c23f0e79d919e636c42b3f352fa022ee. 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/CA5KR2178198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94029a264c8839a84b79f2fd18dcd7d2fe55a07204dcf126feb1f16fe6b8b989. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZK6F2077715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa192fe50549aa5e092e44ca278e53d8411f2fee26c68b13164dd6e07c90ff44. 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/QZMEM2304590.