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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf9f38fcdcbeafc9bfe4538e5bad39f0573f12fe515f0e5def7312e6afe0f1c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/324a75fc-fbcf-414f-8c74-6f0927d525af.json and https://artists.proofprofile.net/proofs/artist/324a75fc-fbcf-414f-8c74-6f0927d525af.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe555e2891c9fa3dfe896cd77a5ae04fbb0f984f959b5a12326c48281e6e6733. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ITF251700129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51edd968a04079e75156b5e4f7799e3113cc1413efba425fc0d7da5b7810c174. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:20:08Z), 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/ITF251700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6229dc129aed573776f5e996cf95495c7231bc55250fe3f7ac8591bc21ac410c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:31Z), 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/ITF252000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcf065ae872e6044b56fe90631596046c4353a60bd9236bc0f1a2d82da0506e. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:35:56Z), 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/ITF252000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6702038f6a2f6006bf623b3f4c736eee4a459ab2ed533bb47dc03dcd88160f65. 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/ITF252000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca114cc6114b79c2ec37ac8cf60459201880238308324d4946190deb4159751b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF252100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c13be70ecf84cb280435fbb86f57efd65e85ba60fd5b9527f922b4b56db6d6. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/ITF252100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0779f99cf1182148fffe86418000878ee7fd1382978d0f778a2fbfc0fc116513. 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/ITF252100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8595e52d095e2e9beafce059d7f6ecc32d1b6d857cf849caf4f530f101ec800f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:31:50Z), 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/ITF252100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e3e159c2a91703907190ba38575e9a16bc1d0aa5d3150952c488d9ab5e72b3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:11:46Z), 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/ITY1V2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bbf386dc807a54800d7e78b526e3b9f9bd403faef4cd52b8a632f32d45d457. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITUM72300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843e42073542b2858ae4c4cef7bc82d825d81ef88b2d516356f20c950e8179a7. 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/ITUM72301281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb017a822090bd1ca9fd7bdec2cd94406194608d48f8309c743a3b360973b3c5a. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:54:57Z), 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/ITUM72400566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d23311b270ff88f1f47f229e6582c874307f7a1aef886ed2fa14cdfef61292. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:09:54Z), 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/ITF252400577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09254687642a585b796a9a57c0d3631258cd65cc16e2b4d71a3fcdf897140408. 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/ITB551915482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837a09f6cf7fa742640d9b08b90840a8fea84248b339520908692738b07440d. 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/ITUGR2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7660a66411521132221f731d286997dc980b1e4f52c3c603f657cdf5688130c2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ITUGR2200014.
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