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 0xc8c6dc8ff007c85d8fd214730ea22650e0ae778f7c43b9b48d39c51c2fd0983d. 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/f5c8022e-5e12-4d8d-980b-1f4141773487.json and https://artists.proofprofile.net/proofs/artist/f5c8022e-5e12-4d8d-980b-1f4141773487.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 0xd84ff77feb2d9e18f551bad40f4c7a1b7cb60b26b56d3706ee690184dc7a88fa. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/FR2X42291508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec95218bf97b3b45cd6c952dfc92d8de1d119a5514ca729c9336789623b6f464. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR2X42291509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f01c7ed4ba62440352c5239aa2a2d52ba535610280e3d7feeff4874be61626. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR2X42291510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb686725ea748b86307629e6d905ab6c16dcc9ead297620313cd9baf4a0f236a7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FR2X42291511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c089c910af910c921eb48bc181f03a9ae73522a65c55dc6edfad5116af4f3bd. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FR2X42291512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7506d439d6746389dac29bffa594c4cad9ee65d5684b6a75e91a239e875a921. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR2X42291514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805ce67bd93ddc90c868cc0d5ef3a13749e36fa6e2217c03f047d04a8ef23ab7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR2X42291515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9c147fd833e5cfb8928d8ac8824e7f53a1b96ae1d2e371717c0c76a2bfc15f. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FRX872239766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eed38b948b661a48148cd1235b807c7912b11f40f057afe8094a469fd697759. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA082280938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a4acb068fa4f4786a903ddf85238b2154b35c4cde8d5ec76156010689bc010. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR96X2382195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107b9a82e86f15468208813f8a9d79aec1d6c679c249d871a8ccf9c15958c6bf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0L2354648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fc23087cf51adbf86ebd5225ee778900a19a3f51ada2c1127ed4d3055d3e7b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X42416789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fa457a3ae34067c722a9c1a3efc0df16930d4d2aa2335b67cdd49265efc4c3. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FRX202478440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c876b734ac2015ea3c197fbec17d4e9e110f32095aab4a03e39756fce0b196. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX202478446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c5e192652f6f47743973149614d2fed06adec7f2fbd8df516ea78ef807b89d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0P2353302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf317f499d3ab9e6f33d70d316375877e130bf4845dcae8d9659667012bd62148. 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/FRX202478442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41797c249e094f3850bc7dcebc556c54439d24924a4c3a606a94950f5a5af714. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX202478449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232e9fc9af9aab91bab07d9380cb78e24f9d0cb1d0d1c58ec5b1c5030839d94b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX202478443.