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 0x6851ca88ba7f7e1b41d087bc1ef17012decf0abc33a7b2b35a96ccdb27d7dd08. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21a9bb12-6a77-4800-b473-38c897c6f791.json and https://artists.proofprofile.net/proofs/artist/21a9bb12-6a77-4800-b473-38c897c6f791.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 0x94db4c7c102887ed508ed6839e576a332a421a1baa8f8371491a8fc6f5c0b965. 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/QMB622200373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb66bdc7b483be7dabef02fa6a233d1419a42b5f21448367188af9aa3d03818. 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/QMB622200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e54a9856084368e91d31f655fb86952a769c70246373a44f2f15e0a3400599b. 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/QMB622200377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b92af63d6ddd0ad793d03f0d570f9d7add725b0def9bd204714716757b891ad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMB622200371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1da903f12b2710335c73fe53574e3fe7c3cee634520e40da4daf543dddcac60. 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/QMB622200381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94051b69b74d9b54d606b1b5b2e96608b608a4da2a45d36f06dc374048b7589f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMB622200383.
Bridging Gaps: Portraits of Rising Female Artists [UK Edition]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23ad4d5d6456119f9ac89ba008fd6ce3a312c3fffbef532777ef02a45891f9d. 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/QM24S2300506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c39fb324c36b7fd6af25035d3c8b1268eb69df8922701eb6d4b756f5140fcab. 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/GBX721800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf80d3415ace989c10fb0b311d055dd5f234c7e61f72841caa6c311a37218c0. 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/QM24S1925096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7fd4526da104c76b9b85fd3e9aa534de88a7d49cc63cfa3812ca6aa281a6d4. 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/QM24S1925097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb425e07e794c68852dce6d511eeb4df0b51f90ec2f1288eceb3dc6e85efffc1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1925098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7370a07c43b44840486376f62aa279dfd2a2a36ec480929d49e979cf6aab3a8. 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/QM24S1925099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7288ec96e3a0fdf47daf5023fb4e8d392a3c197a5f123f358c8600fdae70a72. 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/QM24S1925100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3759bec51dfd8644024e7241887fe3dfa4207cfc22f90f15e77e37a1f4ebfe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1925101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b815fbba0b09802ba98898069a8540dab6db014ee412792d07e7411a64db76. 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/DEXC81900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbe765478bbccc8a0bab7db11bbb97ab547f91851f610951fbf9fd86ca4bb53. 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/GB5P51900274.