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 0xc48f160172f212e9dd0b6157376a5c19d34fa34daa73a426638c24bd3e147b88. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4f4a2e1-e0ba-4363-8930-987807d0533d.json and https://artists.proofprofile.net/proofs/artist/b4f4a2e1-e0ba-4363-8930-987807d0533d.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 0x64fcba824fdbe624344f691589bda29f4ed865f0334be501f83d0fa5ef4d53f7. 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/BX6Y62400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c9c8e14653f746030ec170c7177970e4dda9acd3049f578d7cf19bab8fddd. 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/QZWDD2287363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf169f9735e64f9c91078937158cf592d485c9dcaf9ce84926863377f17f55ed8. 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/BCD592200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37362766f54e740d4b5f71d9755e7ba39e4bddfd76aac7f8119fee47417358f5. 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/BC3TN2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfe82b75128aa1bfc731fde58aac23152db60d393f56e0bc280adc23ba49286. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIV82315613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fb43aafb02368b3097730176012ac9a948280232e0c6d4cf339826db765967. 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/BCD592300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fb43aafb02368b3097730176012ac9a948280232e0c6d4cf339826db765967. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BCD592300086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf169f9735e64f9c91078937158cf592d485c9dcaf9ce84926863377f17f55ed8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCD592200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff132b72490b5cad908ebe56024bd91696d95bc6c9bdc6c7249e2b790de181c. 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/BXHCB2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bdaf6f8a0da2d61cdd9d308f650cb9fa8959706e8c97603ffe4dad977c603f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BXIV82147972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad97a56886cb094abbf030440b13fbe4f922bd025036459c0b7e22ac58f57f3d. 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/BCIGI2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f9da298f82c832441cddf695dedfaa03eb35e9fe6e838e49e64ce545f10948. 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/BCIGI2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad97a56886cb094abbf030440b13fbe4f922bd025036459c0b7e22ac58f57f3d. 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/BCIGI2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf31c4a41497ba3df2a8f2f93764bed3bb0c9ec4904cb314e1f5d77378a0b273. 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/BCIGI2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc3657a23694a2d60363585ca3ae8d2d05476daf00bbf2a0e7822b865be4268. 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/BXWMU2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8e12e886dab9e7c3d79ac8daf8958250a7c1e504d279c044b240f8dc2dde40. 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/BXWMU2200006.