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 0x90f3e2bb02057c7cd474aad7d6637219de6987a24e48f44882d5248de6f55659. 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/7caf9131-fe74-4d12-94b2-1dfabd5b3f5f.json and https://artists.proofprofile.net/proofs/artist/7caf9131-fe74-4d12-94b2-1dfabd5b3f5f.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 0x8bc39361097822c4827164c1c931b43197fe9ca160b3de78af0c42e69fee1569. 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/ARACN2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46c00163148e8b1d0314e760df20033706516b6c7af1eebfe508a3fd53b0cf8. 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/ARACN2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5872462dfa3d95d92669ade787087da1dd03c74a482de166f97caad2e01ff2d2. 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/ARACN2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2e55de8294fe644da73c8fe7fce9e16fb52a3c244f65559a51254b507dc778. 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/ARACN2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622f98b9ae8f0e63faade18afb583b4796b6336a45f0530c4dcd6c29b60b9052. 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/ARACN2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4271d8941c3d6e1c877a4acb1d955815d73148920df30469e9714fc48fc40fd. 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/ARACN2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc39361097822c4827164c1c931b43197fe9ca160b3de78af0c42e69fee1569. 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/ARACN2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf193a41503d6dd26d6db8f1246b5d5e5cb5c82ae25fbe68991e539ed1541e59. 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/ARQIH2290438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf485f25396273ac7d7f1397ad90f63667db3de1ee1ad74ba7e30de0ffcbe4d69. 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/QZTAT2178884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f8aa2d5870ad1b574ccc757ef69450c8bc8aa8e70ff48e592a13de54447ec. 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/ARQIH2291692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a274aecf23915b682758d1558767d9505c471cfc28f8e30212e3b1860f9fab. 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/QZNJW2410022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669539cb44677a252878e0aef4e6340e53c74eaecd8a3d7acb3e6738b0c4c4ee. 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/ARL2P2400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88ceea9beb315cafbe170ab9fd5c10ec8e3e86f118f4f94c192762fac251f1b. 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/ESUM72300603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8cec1d69f77a8795182e21668b8eae4bf7112226d19ea4bcb7c0cb2655c4f6. 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/QZW9K2289599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b493b745fb5b7ea6eab1d7adca3b424104f8c72c097a62dd77736107f828b42. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARQIH2291130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35143302739e03116ffb4e6e0b0c99b3aba51402f7f365591dba8b34be0b2c5d. 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/ARQIH2290932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bf1ec9e079928cd91d495bab4e755dac0626251fdb77a5f24c116057e8c14a. 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/ARQIH2290894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17ca3b72a91aae0cda697d2c09dc08455049603bf6a3e2da91d61a9bbf0e165. 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/AR5UH2401204.