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 0xba6027388ee55055ba080cc98388f565d1a7792ef01d84ebb75db8d3069a0aca. 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/dba902e4-e8ff-4d7c-9db7-546737c4d576.json and https://artists.proofprofile.net/proofs/artist/dba902e4-e8ff-4d7c-9db7-546737c4d576.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 0xaff7b717af5e68af952290a4316bb811c4563d26bb1945d89f5e037664c2d352. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/NLRD52260529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7575804b945c7f967946eb3a769e35d80aa512a4121744ee9e438c33f24cee. 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/NLRD52308214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa049e8b384d787a907e2747963ebec66673d574ea1b4997662984db866425834. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/NLRD52308211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c46c00ebbd74e85ab2dd8ed678fb277a7835f747204b7a9807e2cf77309f9a. 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/NLRD52308212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422da1c4e784a8111b4a4c74905166bf63e4d50cc4d814ba7a009b96f09b74a5. 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/GBKPL2210052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0882db1366667f23bb3bbeb14a3a2d2997940fd7f36090e3f7d576aa01ba8cc. 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/GBKPL2210057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8cd7c9cbbc12b5ad51bd6c7a157f12b23a861908958cefed4210dbbea6cda3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBKPL2210053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d6606c008496e75e0861fdae2ed2984da4468bf89f18baca4c5e80acd07ee2. 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/GBKPL2210054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f99f30b186d29587d3757c3014d10afe4dc2e36fb7dcfbaec763b240b4f308d. 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/NLRD52328852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e83a1384d699cc2b3e3f94e3c95124bc66244625294a36556ac1476b448d91. 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/NLRD52329093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c762d4fb28dda3aec9efab2a6fd3ea700256c8296dccc12fbd4c34f48e9c4c8. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/NLRD52344560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636f3d9d84504f62e322e67348818716bb19d6d2b2721e2bff5a94a88f703bd7. 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/NLRD52350964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfa3e2fc5da79a40a13afdac75bb12c27d13d13c6b1c3d045d53c1f38d90c4b. 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/NLRD52351918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1696543c9344eee4a6abdb2fe37ec66f06dbc547ef8e7a8a2a5272ee7a011c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NLRD52422938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bbf4d14806ddc70ea601235a1b0728177c57abe2018d78dc6f5bf6085b3a58. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLRD52501194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8831dec78be509151f5727574d1e137444b4d71dbab5227652fc446ee126ed26. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/NLRD52501195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee4209e6badea4ae4a5239db07a2f3b7747e96ae33b5791d1ae973498dc843. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLRD52501196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa284c3b9524d84a4a10db8aba990c791b9c82fc7d1fac7de122d0784f23d809d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NLRD52501200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ca1a87744b927c8496eed1bf7e89f262cacb8af88c0c0a2672f8c3b17f3668. 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/NLRD52501202.