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 0x4c1dd6d64fafa29ec56d45c75514969b71328fa4b0a2196f2cf04a2d8ff868f4. 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/bf0f31c2-5c1f-46c0-bf0f-a9ab2a2cf4e3.json and https://artists.proofprofile.net/proofs/artist/bf0f31c2-5c1f-46c0-bf0f-a9ab2a2cf4e3.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 0xe3642621d31c6561e5d1323c896ac57d309e6dba41f61f0c5deb94abe9326d04. 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/FR79W2201120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9559fa0813fa1d3ecef666906d16bfb9e29e75a5f660bc39fc7afac60435dc0d. 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/FR79W2201130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31130aade24fb9a674ca3268f234d8a5904fd68e4c366742b8df071ec55e776a. 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/FR79W2201140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396cbb7cddd08b9aee13a4de69c1c3fcfbdab06efdce25321cf173a831acec89. 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/FR79W2201150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb385b2088cbd20f0e28b44dc658630b011c7df83b994325cf96e30498235e2c5. 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/FR79W2201060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7382997e2fb41b9eeb65b46b60a970c4b8d9609935dc6a40f99a165fc8e7d36c. 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/FR79W2201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916e7501cc694086fef076128c0e28e79364bb46fb1b05c84396d46b8be9d4cf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR79W2200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa43fc65ffc9314e293f0f5e32e6b61ae3a5d37a911ecb256bf0cfec0856f56f. 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/FR79W2201170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219f7b728728bdf11b5aa2c4d8e77587a18beb852daae7e2cf9127201afbab15. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR79W2201180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606b7740d9d59e65df0b241943fda4e48044b632cc149ff9dd70e05b5724d772. 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/FR79W2201190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a22a781b3d1d0b4da3939b7e99c2f2df2768b158ca1ae7024a409b325c3c18. 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/FR79W2201200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a4cb58675e058a277b55b3341741f0166a7efec8a765733ca59ea7aad29246. 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/FR79W2201210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f2ecfa747f5f9b43481b1c3425add5ba46b760f04e6cb6d31ac30d511a9a16. 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/FR79W2201220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97449f3dab730ce83df2ec14bf0e626ffddcc7e13cd65b2a0745780f40c0d29. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR79W2300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23e1ae07c06b45c4be8e77d335d312385f188554a40495ff0fe6eaceef99e3b. 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/FR79W2400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66481f66e5a8b72ed9cb8bbeac06ba7c25b1d543797b858d99eb82e6634eec41. 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/FR9W11915479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aff10e99af5451a06fcc2971b76460c84a6d25c8eb56e0fec88fa9d8a497053. 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/FR2LY2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aff10e99af5451a06fcc2971b76460c84a6d25c8eb56e0fec88fa9d8a497053. 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/FR2LY2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253d41127941db106fa95aa9749b89bc8969cf80fe36089f75cbbf2d85740170. 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/FR9W12118949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253d41127941db106fa95aa9749b89bc8969cf80fe36089f75cbbf2d85740170. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12118949.