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 0x260f6d920e6dc2fa31f60f81a2c2ccaed47f304afedf0366e8570187f761d7cc. 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/1cef2ca6-0cef-4c1f-90e9-b34d4879172b.json and https://artists.proofprofile.net/proofs/artist/1cef2ca6-0cef-4c1f-90e9-b34d4879172b.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 0xe47f25dff13665b9b13312e9a49ff0d084dbffd50ebd6f4d99575548383715ee. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BKNDN2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac9e9c6ebe7612bc885f76256aab72b48cca35c20d43e67828702823464aaaa. 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/BKNDN2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b76cafe7ae54f1738a2510b272aa00c7d39f8130a55bc97c69c18ca63f5298. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BKNDN2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47f25dff13665b9b13312e9a49ff0d084dbffd50ebd6f4d99575548383715ee. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BKNDN2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54904ae1280e356acb3e17bf3a5af3c2f47c984c1d01463860ec754d9b3d4b5. 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/BKNDN2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac9e9c6ebe7612bc885f76256aab72b48cca35c20d43e67828702823464aaaa. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BKNDN2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c29a315546272727a8837cb53b08318d98d241cc3af53c02b01793840242178. 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/BKNDN2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b97293ded09e8c45fb9bbf47a93675bc5ec0e889d530c70f412f118757d38a6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BX56Z1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26517f710c4af77b09605eb48f645e67ef3025e4b4b903a1e8ca535748b97e3d. 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/BKNDN2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5535be49f690ac0215c9c031c027cd9ee41047efe162c2590285d7c266516a4. 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/BKNDN2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0834edac128ccac51a8974d4a9b38ba443643e3415c83b3127c4045c51d5e43. 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/BKNDN2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197e5fa0a206f4ed48d94ffb0e0735ab3dfcb997592ee89373a01a30ba7d1218. 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/BKNDN2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1e629f71f42fb320d3aa1aab345d88a57f5725d4ab4bb0098e92633043514d. 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/BKNDN2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebe77dde21781bc6d35c5a7678df57799ed10e5ccbf6bc4ec3b76d73f19b153. 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/BKNDN2500043.