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 0x0d06d59b06b7db1ff07085a945a1b72644c829d18e8009e6175abd347be78ded. 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/633b8fc9-89a0-4f5c-b3ba-381cf387a941.json and https://artists.proofprofile.net/proofs/artist/633b8fc9-89a0-4f5c-b3ba-381cf387a941.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 0x34e5573d518cb2b91df36ffb207f10860bae5a98d50a7d5f4f9e302abac9aba8. 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/QZEQU2300442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c919a4a2f73f0eb8f269fe99a1f8acd52997cea53ca664085e05c1cd74523c1. 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/QZEQU2300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9540a8f103e08a3d63f36a51bb518806d23d3a742fb1e84a7f38f757d1a9abe. 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/QZEQU2301739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c3a961c9b8d3e641daf0a22658b4eac6e2d229d7be4edf509f05c1df9c4c45. 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/QZEQU2301507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55626620d0c107ccab8b0d5de1790507c1a90891c2933542b32a8a27d0b1e270. 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/QZEQU2301677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fbe9c1a92444b9249318b61d73947106cda4f14fa5738ba864ab0a568c8366. 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/QZEQU2301740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a30448c20ebe074f9b0eefb8b76b2add9cf70e369f1868bf22bde89e3aa000d. 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/QZEQU2301741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d717b9538348e249bb0d6b9f58646c1a95a20da2cb82a5cdc7318bc8f49e521. 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/QZEQU2301742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ad2f7ac6ae088b7b339db0d1de17ed5bd4944ab73df38a21aba6550dff0142. 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/QZEQU2301743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e2e16028dd2a31f1a4525b6a446c76a007c9c1a3c5e38a2c41a2ab5283d02d. 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/QZEQU2400865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55626620d0c107ccab8b0d5de1790507c1a90891c2933542b32a8a27d0b1e270. 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/QZEQU2301677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c3a961c9b8d3e641daf0a22658b4eac6e2d229d7be4edf509f05c1df9c4c45. 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/QZEQU2301507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c919a4a2f73f0eb8f269fe99a1f8acd52997cea53ca664085e05c1cd74523c1. 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/QZEQU2300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e5573d518cb2b91df36ffb207f10860bae5a98d50a7d5f4f9e302abac9aba8. 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/QZEQU2300442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c919a4a2f73f0eb8f269fe99a1f8acd52997cea53ca664085e05c1cd74523c1. 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/QZEQU2300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e5573d518cb2b91df36ffb207f10860bae5a98d50a7d5f4f9e302abac9aba8. 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/QZEQU2300442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0412d6539bd0108dc8052a2adaeb7b107612977039b49e153cd2ae67a61330. 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/USDY42113447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf620b11e82e20b70acb13d4807f0e7d97240408a5d104e4a149df99f3113dbc6. 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/USDY42113443.