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 0xf6cf837887fe41857368b3ccffb59cab8e156e8589d02d897b492297c72c45d8. 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/25e843f6-e06f-4c24-83f5-587ba50ec032.json and https://artists.proofprofile.net/proofs/artist/25e843f6-e06f-4c24-83f5-587ba50ec032.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 0x0021e957edb53fa319ee99c88b2485894792595f59dbf9e6928b4a36c952b9e0. 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/DGA0Q2499128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ba339495a23226af61c506745bb22d15e254f42d70be1530698a698526f967. 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/DGA0Q2416721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99528a0279c2ed8bf408933491daf4775f9423815793e91f2f7709609e26811. 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/DGA0H2484557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ac72c4c2a48fbc7518983d741f478617c90f0647524b4135e997acf3ffbf11. 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/DGA0H2416284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f63b9292bcf48303fde0a3cb1437193cbc5100c809b2d48add8987d49940b0e. 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/DGA0M2470020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636d40a0e8c6a8146b07b375d7f3aca4a2b463aed4646e6a41456a17c9d9d000. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DGA0M2468630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239dfa6825516d3282ee08ff032ab961c9eba7d3b8c5d781e49a243048ed6a29. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA092406711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14719fde590ddf3d266dbe293a3fcd868b9944366bdcf3b7a3606e9a2272be5b. 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/DGA072429024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e543fad0e0d82a7b0e4d2f1185efde2f71268f0648b34422548b9e022d0ee2d. 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/DGA072437314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4b23b22b508043e7293a7508d328fe89d572767b1dd948b0900b0c55492a27. 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/DGA072418133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c8aac997b8ccb4d61d21b2c6f7aca2ed02fe10f50c549ceb7970af0c966081. 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/ING212489964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3201ce02801e4e929bf36e3a84701f27ba26060074e6b36aca4eb274a3c84e. 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/ING212486415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1e5153e5158a30b5beb791776bb15628dc56d1d0d0fb6fd16562d62d3d799b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DGA052447701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1e4a453cec19f44e68c5cee86bd2f5b0dbe5939a149ebc78070c21d0e1a5e5. 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/ING212485068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2713ea285daa0c0a83daea1052b9a2f22afc9ecd33ea2c998e703bfae3bf691e. 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/FRX872456231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98188bcf103d1f5517bc75c0bbe4f31db74e0b82b03ddb22f211c3067d2d6e8d. 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/ING212479864.