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 0x47508872ca60b1f91b773315a3568f0b0c585d4f56497107c108d4b94d704cbc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bca242fa-90a5-4045-8171-2f6b6ea3c6d3.json and https://artists.proofprofile.net/proofs/artist/bca242fa-90a5-4045-8171-2f6b6ea3c6d3.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 0x64c41806597a738514f079d5d50341ae1b8d14b385637b3db379441cc61f8b5a. 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/FRPHC2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f35a346aa88d63b9d511d90ffa47290f0bc661e03467ac8baa5d9a01b1010. 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/FRPHC2000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17d235c3a9adbc6ecc1aa7adbacc8d62ee0ce4d36b73714edf3f1595dfb7c65. 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/FRPHC2000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0be142f0a0e395e40ce84e365c1ce370584ab964c4c67651cf8fbde852f4b11. 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/FRPHC2000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f54c47833d73efbea6d321007999a2cdbc952a5294f4ab2bbc6c67668f18ee3. 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/FRPHC2000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113f786fd8f69e052cfcf318d57acc0f1a777b1bb87c4bf9db841a6111ba910f. 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/FRPHC2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f61d3ca51526f519b2be0ebb233fdd1219e9935a6098e22cd5ab934e35cedf3. 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/FRPHC2000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228ae1370f4354d9995c5f3af39842e89bea61724d06674b0570a42976328b90. 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/FRPHC2000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2436fdeb9a1039a158879c0e7fcd9cc6e513a07c668774f3b29a94aad6dda3. 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/FRPHC2000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c41806597a738514f079d5d50341ae1b8d14b385637b3db379441cc61f8b5a. 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/FRPHC2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f35a346aa88d63b9d511d90ffa47290f0bc661e03467ac8baa5d9a01b1010. 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/FRPHC2000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17d235c3a9adbc6ecc1aa7adbacc8d62ee0ce4d36b73714edf3f1595dfb7c65. 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/FRPHC2000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0be142f0a0e395e40ce84e365c1ce370584ab964c4c67651cf8fbde852f4b11. 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/FRPHC2000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f54c47833d73efbea6d321007999a2cdbc952a5294f4ab2bbc6c67668f18ee3. 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/FRPHC2000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113f786fd8f69e052cfcf318d57acc0f1a777b1bb87c4bf9db841a6111ba910f. 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/FRPHC2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f61d3ca51526f519b2be0ebb233fdd1219e9935a6098e22cd5ab934e35cedf3. 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/FRPHC2000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228ae1370f4354d9995c5f3af39842e89bea61724d06674b0570a42976328b90. 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/FRPHC2000058.