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 0x4aa8bd0cfcab627b8b7c392e0fac4bf55caf058a5c0e2408d31ba53d9630e49f. 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/6ddd0652-a7d3-45d3-9605-83e884600c17.json and https://artists.proofprofile.net/proofs/artist/6ddd0652-a7d3-45d3-9605-83e884600c17.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 0xa43e9f4cf912e9256b74b9140096eac3b7766207165364b1d2d7a20055512506. 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/RUA1D2366946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edf56193291c613a919439626cf444f83bc2598be30f1d7a8f2701d9aba302a. 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/RUA1D2376088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f53ae4e36628c64e824306ba340f7221c9c5a347cfebe2225f06720e8f1b489. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/US7VG2440143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd982dc74ced0fdb9b588410fe3f33a4601eebe2f14a3b82f05cf882ff588b6a5. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/US7VG2440144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03ed5ca470c3c197ae26b967066e248f93b242935ef4fb92b0956b49fc06190. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM4TX2462846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4f4d5db8c8db59722d2178a848d692269744bc5abaa7949a322c678a38f3af. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/RUAGT2469742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ed25a49b397a826e41dc489227a275327103ae0254f6e6eeb4edecfcc63150. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUAGT2481738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a723b1556f28ab835d2d4dad51df791e697e030b890fc19a4cb10b0a423cee. 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/RUAGT2481740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089a409a1bcc632290b3ddf5ed241b3fd095821edf083ebea019ccaf01ff2f8f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/RUAGT2481741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd199b2d3917b64a464456d90598ef66afcc13c62ebed3b7d2f71601052f13c82. 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/RUAH62424972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9664a693af3ad103c0a3eed0a30cb84d2217bad9a548581f5e90aa65b843297b. 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/RUAH62424975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ec86ef01632ef362898c590317a79dfdfc8e80f12d681ce26308332bf6e8aa. 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/RUAH62431987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe6090354bfff9cbe587f059b551abdb355458db6fff231b3bc20b1b5dd9eee. 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/RUAH62431988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67ddcc3e5864fda62e5d06103cb21bb632274cf6e3005f660e034bc385f732. 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/RUA1D2517417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3c13550626d44fb104cabda375b675b588e72be9481ec75f1f3c94a3a9be1c. 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/RUA1D2536523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e2ec271ee9e9e9ba4615d69b4fce12e9d3d2be5761f3fa1c1d2e6200762c2d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/RUA1D2548107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aeaa644700fa58d5c6caedafe8cad5ed22d9eecdb1b15227ee0138b58d2d97. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/RUA1D2560443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b0db7644e23d04c716c5c03c725ca1e1a6135f7759e8c49589a4913f450403. 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/RUA1D2560444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905354a4ee58f914ef6bc2f4eb3be73562a79cdf4a81eeba7bd635afd0c3f15d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA062515083.