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 0xaba75e6eabd143a51fad8646c682f808518874bf149b9c2f4844734355163d52. 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/e775cacb-8afe-4a31-b542-9a7b7b36c4ef.json and https://artists.proofprofile.net/proofs/artist/e775cacb-8afe-4a31-b542-9a7b7b36c4ef.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 0x013cea9a39dfaa42ba2d44fb185be2c0ad29111f6548c8d23508ff922ea5d1b6. 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/SE6XW2384141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5430bcad13077a9f3a3b7261fc11659f4279f47ed8f5607d1a4c79030bf7f0af. 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/SE6I32397464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a850e258d5da0a93b4725c7a06f448e20fa677421518d5e55c1aac3749d6ec. 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/SE62M2249546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb8954b19b9c58e1eef257ab50eb9493ff9c60873e979e4a7f65e9eb577cf19. 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/SE6XY2246434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91973a18d3941a48cbbb403cd24190336b6e0999f583b07487ce84e991d4386b. 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/SE6QE2252279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dcc85476ff4ce6fa33d2c62149743e37d8c4411f306bb8031faecbdbd58a11. 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/SE5752223471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b05b69b80c7889533c2f8781fa126c940bddc3eb69d28df23555bae5013c96. 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/SE6XY2151731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2a44608997b30dc43ff4fa2fc6de89beba068d0ea06f68033b7f20e78ed808. 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/SE6XX2184680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7e39849dfa832336bed6b2da8501198f7d0545279b9d65546fd6b91f7ecc19. 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/SE5BU2430764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8e178d5aa7dc6dde700a9394503d2724bd9d6665069d13e01bff64b9bf6447. 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/SE6XW2387450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d70b41d15a793f4bb32d83cf95e9c82a7e0c63b5e08900d1ccf21d212055170. 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/SE6SA2362073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2f2ae93bc1e662f1b6779cbd6d59cc864a4c410871f6860307ff28fbc0d89a. 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/SE6XY2334124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a443bd793ae923fa33907b7c707146e2fb9c9508049a075104ab6d4d32c3d0c. 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/SE5752323428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e94eab0e563f7e2035f6ea137270755f3e0f070e744c85fe86c8391dbfbe62. 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/SE5752323429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78e4ccced2e4422bd623d5e27db51b45fbc354f54dec61c9d472d33a8918dd1. 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/SE5752323430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9ae7a85d6121657dc95ded6c231cc57479c9abe6833c2fb99dd682c923c648. 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/SE5752323431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e6329aef774a48fb7aeb2f78e7eece73540894831c6b93b632b8ae0b0ba471. 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/SE5752323432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a850e258d5da0a93b4725c7a06f448e20fa677421518d5e55c1aac3749d6ec. 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/SE62M2249546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3be0fe4a32d5ca1d67a98e72bf3147ea946139cdeddfe62eeaf2250b82e8631. 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/SE6XW2203833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d392a42992d892ac85a98aafeb60c8cc876d0582b426298ac9a23fda692c5ea. 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/QZFYW2154196.