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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea77ec294181652fa1a0b6e89db4b346a9eb8dbcc0e45c304c63f0c81bc20be6. 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/65d89d9a-1283-414b-9e44-a9249b03e0ce.json and https://artists.proofprofile.net/proofs/artist/65d89d9a-1283-414b-9e44-a9249b03e0ce.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4674b91cb3821b7a2747d27299eee6935a23e17b87663b25fcbc6fe6cf9edcdb. 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/ES6080444202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4ef8c1d7c631a9d35fc7fabdf0ce224944672bdb18456299a70364646376fb. 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/ES6080444203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f2545c0379b41b99f8cbb0b034ffd1958f0602f7d96a6893bd6fb531efc963. 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/ES6080444204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3378a34ce29cb75064fa640a849f90716c6aff02252815c3718668a433bbb79. 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/ES6080444205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5244f9613b847f9016ee0f38bdfc5c3fbd7a10cf05bc7becda65c3751daf0059. 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/ES6080444206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e89dddeb543ebe9af8d7a3514deadca4c655c251c23783dbf5973a5a0ee7ac. 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/ES6080444207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562ace7a152bc5ec9591a19929ac172d837a2c2a7f735c05f3703f81a544f819. 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/ES6080444210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7265b54764e18479cfcc4412a446aa06141c46eab94d2ab1d2ab93cf94f19a4. 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/ES6080444211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb301077f599cc3539baf9e1433a3b6e8b6451a90057056945c4d3b1b5951a2. 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/ES6080444213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f2fd9e3c321c75faaf63d26fb910915d5f06b54f148412f4f3ea11d9a99f1b. 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/ES6080444215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e20a8728254110400d6e25dc13d7148b9358be446d52123811fc7114472e41. 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/ES6080343301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda62dd703a951908e98dd570767d626a7e4f028328eec1eb5a90a08ddbf08072. 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/ES6080940102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b84a57581547ef00d0286b0d3ecfed14e4634e5613edca7cbd4b051eed09ed. 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/ES6080940105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dc93ba85e32b38c4ccb942000d9912a788a62a1329769f0d90cef881e4cee8. 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/ES6080940107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b7c39e24eeaa6359935277c195e45c67bf4486f0cc4a7d4d93de1be83c456b. 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/ES6080940116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf6610e2fe79990666e992b7a3d943f317eb8017096d74beecd5473110bd128. 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/ES71G2029635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0d9061595dac1853a7c155a3ca7c00e4b0bfd0928dad68751b8f91a71de5c2. 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/ES71G2029638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63daa8eb854dcce4a6493c1714cc34d4188c7607442a54082cf6cb7636b23565. 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/ES71G2041955.