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 0x79b7338bd37b00aacec6e7cf4d708dc8a62c1b87686a76a66fbe624baac167cb. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcde2225-fce5-4783-b6a0-dc12c1062813.json and https://artists.proofprofile.net/proofs/artist/dcde2225-fce5-4783-b6a0-dc12c1062813.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 0x03ebc8e76914d6536b55be0740239b166ec8c0bcca31d59126d381f811865332. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZMHM2362888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031301ae2699d23f1df2894c3eb826a26762b0fec4d75cf9b81a872036ddd900. 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/QZMHP2309938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057d857f096f5ae347044c67871c70584fdb15cb74ceec6a543096e5d8e5df46. 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/QZMHN2327450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e825229c699024e7f2767f2e762439ef293600479fe5c57b8c34bde5735ef44. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZFYZ2431244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778a1f6d8101ac89fb216da01fcd09f71510d2915ca9129823705b72c9a718b4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZFYZ2431247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f6b72542d6c1aa1a80fbb698427adc8ce5b581dd38d6f07389fca878cfaafd. 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/QZFYZ2431250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1d87b6019463ef5b6295126a3166c86d2f9d7b25649b79172282ec72dae639. 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/QZFYZ2431255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa92dea5a067e9d3675f3ab062912cf158c13144e097c8efb8584e198ef9b0eb. 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/USL4Q2435646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a26e2afe4590c74ea7285b1fe3de48ea7e72cd76d231db3dd5121fe6d722e47. 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/USL4R2455492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa92dea5a067e9d3675f3ab062912cf158c13144e097c8efb8584e198ef9b0eb. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USL4Q2435646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a26e2afe4590c74ea7285b1fe3de48ea7e72cd76d231db3dd5121fe6d722e47. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USL4R2455492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbbac9c8893c572acd12e8229405ba649a70df7fee9aa31c0779fef2e206d41. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USX9P2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f1ad20c361393837b96c2f3b201cf5fec3b7d7bc286ed1d021db15aefe91f7. 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/USY242432192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a8b9a8aaf43fad04af26bf06d05db82fbdd160f4112404ab77a46728b57d7c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZPLS2438186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1975064bc669d00ae123703af2e1f3a87326d7e9f66e94e251512bf43430d78. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USY242432193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6884aed48287b27ca86c32530289ee375181867b7624fa4dc51f31f366ad9a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDA62401681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9846582b5db1104c136bfd6857109b893046bba9c51c56f8c50b65ffd4dc7b. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USY242432194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e5c579c827712ddb58519f279e1c05a761e3e05d4e883b0ecb1b93b9433bd1. 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/USY242432195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e98c15b4e0c00107774924216243002b4fe44043b56553f17ed0126d85ec27. 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/USY242432196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df0f2d76adf83f9b78b90a8a0dfcfe9c43ea6f2ff516b9b7a77306b0e972772. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USY242432197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7f82190aa490f71ad9414eaab9b61a04c04dafd133031f9484c2553ba61688. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USCGJ2529716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c34b11ab5bcc0c1af05265c7e05e622be0be93915550f91b7eb485f7e1dafe. 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/CACWV2584575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea68a9b021cdc40f9bbf53d8510f2eeb57194b7bb983fab7d1c8c4d6e820e84. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USCGJ2598103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fbd59ffaf62275797a3c3e1fb9295979dfec9dfff2231bfccecb36c2a2df74. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/CACWV2595409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75189d3061efffb31748871c87a85d647f4909dacb7b4ea0f74b956d76c5b42. 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/USHM82510753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a60abf9edb356903254cf27077c2d0799847489c7920681facc398db4acb38d. 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/QZPJ32500608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3acf6939b0f7ad6d0f6d217e59596bbb216967534531f2a4a2531fa83e194dc. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZS7J2508218.