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 0xa64c0d239a86c0a0058c1342fb637e4b53d6676027fe798b51f5c9adaeb2108d. 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/f9e354d0-f938-477d-9d15-d265e1f97fb0.json and https://artists.proofprofile.net/proofs/artist/f9e354d0-f938-477d-9d15-d265e1f97fb0.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 0xd1d6707a1f1d407fb007f6cd9ec9acb90db91c17bddd841b0cebece3891d58ba. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6M2357121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f910aeec4ac1ef4c36f0bf0304041cfe94c4bebd6b58ec61cbd1055448556aa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ42445395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ad65e1779ee90bed6c8e874d698e6264f4a87a661ef7d21c521fe0fbe77c96. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJX2418985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526de877b58982360db44e1f36d411a47ec97b8d8aac1e1636b38a042c6b9dc6. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:56Z), 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/QZNJZ2435138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3d1b12517856d5cad507b723bad49b1ada28edf6426701b9a3bbaa55393fd4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTLA2550631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426cf6e33a8fd991512768657bc69334f9a8a1e2a81d50e241a09ef842f25a19. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTLA2509571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115a58975cc990e0ef358cd68195aa9f0b590fcaa05f99e3167eeed0dee7597f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTL92554464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e12bd2056692d8a45eb97aabcaf6b6b326e70f8de18cd7a6cee8b12d8e8d40. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZQAY2570106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fda0086f356153fd187467cf0bbffd0b2aeda2ff468e4acbd7fca3b2f0420e6. 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/QZTLA2553887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a27e9c473221b31f002d5f07cf4c356107efc9bc3cc935ab31f99e74cf3342d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWDW2567835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0758b5e31fe611b94557b82ee538c309ccaf11ee3117ecddce16d9640e9da9fb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZQAY2572027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cc0bc2cba553f3141c66654d526baa58f218c647be27a18e130e9162605edc. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:25Z), 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/QZS7J2571605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3123871a18bb842ac726ee6e40001d545486df8eb0681cd062f2dc1046bd4ffd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZS7J2588385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbff12ebddbd2a92df4a51d3a4fb7f107e3a47286f1fd406d01a25792659e31. 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/QZKDT2400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6669b4262e64698fce0e980f04441c5b4d99796ccb2ea01bc8966e27dd10e1c. 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/QM7282446737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dbb6649769cd12ad94a9eecd8271c02585611aa2a647c66cda9b00e972c404. 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/CH7819573518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ac2032c64817cb902482337cda86c2c0cde08b369e0612e0958d24890ebab6. 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/QZKDT2500025.