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 0x87f952309eee1a75649f8c5c32e7328947db7ac2b2ff83191a7938241b8fbc34. 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/7de4b6c5-1c0a-4c9b-b4b1-826f7962f101.json and https://artists.proofprofile.net/proofs/artist/7de4b6c5-1c0a-4c9b-b4b1-826f7962f101.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 0xb36f5b9c848d98429558d73b008b9502d9c47c3d63ac1ed4ddd86e7e27e99441. 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/PLV402101638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea3216af6cff9ef014cd655bcea01cc6dc87de05c7cff663ac3f65f98985436. 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/PLV402101639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2613e29104f17e8747c282063352322a761f50c7f5a49b8a554072d87ec7f09. 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/PLV402101636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd67251474129b581d19e81c1c59e3dfb7824e2a38ed18c10d057e62e596b02. 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/PLV402101640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3a82378d40155862bd9e8245c77f398db5a558c0a9371c0d0274acb32e08b1. 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/PLV402101641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b13dc286fc2aec51d742e5ab2ab8a459ff06cfefda15a85faa1d26ee62e30f. 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/PLV402101642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a33a5cabd515eeb5c8a9a38ea81eb851ee2c1879dd8d52bbbe77262adefa4b. 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/PLV402101643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7099c961bf2175f936ff36d30e41cc41ccd62c803c72ca36fe1de689ef93c18. 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/PLV402101565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb42c876b513151ddf8057d2589e899cd3589aef8769b808f1c26e3bfd4bef. 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/PLV402101569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb31f08c018ce93ec9c951a65d433966effa1242ff8436c565798aa5080469cc. 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/PLV402101644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e04c1e1383dce17af4432e0286c81595cd1a5d909a2ca799cdc9ccf1dc5dc3. 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/PLV402101645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb31f08c018ce93ec9c951a65d433966effa1242ff8436c565798aa5080469cc. 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/PLV402101644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a33a5cabd515eeb5c8a9a38ea81eb851ee2c1879dd8d52bbbe77262adefa4b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLV402101643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2613e29104f17e8747c282063352322a761f50c7f5a49b8a554072d87ec7f09. 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/PLV402101636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb42c876b513151ddf8057d2589e899cd3589aef8769b808f1c26e3bfd4bef. 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/PLV402101569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7099c961bf2175f936ff36d30e41cc41ccd62c803c72ca36fe1de689ef93c18. 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/PLV402101565.