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 0x5985fb33c1c7abeb0de21675959013b6e8040d5768481be69b34202ca54efae8. 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/56195822-76d4-46bc-af59-750a2bc59499.json and https://artists.proofprofile.net/proofs/artist/56195822-76d4-46bc-af59-750a2bc59499.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 0xb6fcc82f81be617f583a95978139f849482cae6dbd50646fe1036ee51d3cf62c. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:15Z), 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/IL1012200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895261b2617eb3cf7e5dc7b3c034cd2b3486298a637c51fca564b0c3aee71648. 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/IL1012201102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e2bdf908bd3511d17aca9197822488832b83d517ca6e99a288c6bd87d72d8e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/IL1012201174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945559fdf6d61620db8d586daac89e7f2b710cb28fac8f5fc8cde45a7c08f986. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/IL1012201175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d5a8ee87155b72e6df5807a64e2efc9a769dcff4edcdf2b7227a30eca01da1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:17Z), 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/IL1012201176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5a232273deaec736e51b4aaaedf631f2e2d599795c082c1c621f1a8ab34ed1. 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/IL1012201565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d244413fc187333bd1d4712c22172310d00bd1d3d7848e335c3a388b31584ff. 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/IL1012300849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0f0066aede078d4911e28430a710ce58fc188dd3729c9b0a2129b481ff0d6c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/IL1012301556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88125ed52c33674107fe3cb0a65eeb942a90bb9c3ebb987d368f9ee445cd358e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:55:22Z), 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/IL1012400434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c9d016d748ba706496ed83fe142151163a1d066da8af0dd7656b0f70fe6ba7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:39:38Z), 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/IL1012401874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d642660f46ef65e2897102df319d60cc9535c26fdf606d1196bf53c1393ce86. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/IL1012502330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682ca43c32f54ad612d780490bdd3cf169bfc9d26b35a7871070a467b1304cf7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/IL1012502376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460cec89becfd1085bafe5ed340b215e7623ddfca474abbdee991252ea5bb04d. 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/IL7532313021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c226cb3d59fd17882488397bf743424c477844d5adddc5b64968e879f3b2909. 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/IL7532213119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1473de84cde839217704e107dcb8d7a8de2061324dc20260a9be444dec8f3b. 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/IL2DY2300040.