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 0x9c60f6b0db3b22e2f95b7420df321d5d52f4ce248a582f64c2ad9064b427dc1c. 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/de33fb69-b12f-4a31-bff3-1a33af7512f7.json and https://artists.proofprofile.net/proofs/artist/de33fb69-b12f-4a31-bff3-1a33af7512f7.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 0x129ac77dc6a8d50b72ec51e223e47bb48f6ceb2d1388bebd22fe1a50278743f9. 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/AUXN21812781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155269e8909e054a4cbca0568652b83790d2f61042a51d2d3abdf86900dde43b. 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/CA6511600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb75c072cfefaeab37a09c4d0a2fdfffede225894ec5e2ce72a9c11c5f0b31ec. 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/CA6511600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2a96d1a117a3896ed480545c1afaae0c758b354cb7993c09d261b67a6402ce. 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/DEY032302577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563bd04e499566ed4634218766caee39b0eaa80f9266265e88b8cefb0933f395. 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/DEY032102365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5536ab34deb075ec1d779a7a4da3363aa3a14054fa769c3d533b6d39c7b4d161. 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/GBKQU2114139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319aef33904d6511bece3c7c2f6a26e98a2ad8974ef2f6c47c7fadb03fe79d68. 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/QZ9WZ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea8da603ddf104748c1a38ad41e801e70bf9a1ee577bf2cc7f31275839df18e. 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/AUXN22090270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba73bcb60ca4a7aebefde7f66b091d30a209cfce41978b2b230892e69ccaf01. 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/QZ9WZ2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2785b04a232feaf3ae46cb6e8eb7fe8a75ddd989bcff224445bbeaaa7263f0. 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/QZ9WZ2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ad715d6983a2d06a11342181f471b4d4448ebef40e337d1b70260f8f48d2fe. 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/GBJX36016065.
Symbiosis / Rebirth / La Busqueda Empieza / In Tuno Sonora
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae472e37d511cfd8053eac085d895a151bd17af4af37f46ebcb8c41aeae755a. 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/DEY031901524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bbd2251c6f699b69155c2c3a1e7faa6b9ad2dd888dd558ebbeeef827b1c316. 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/QZ9WZ1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c58182d01b5504a5334f50fefafb93ae6f583d969e1298effaa42ae33dcf190. 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/CA6511600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342de42251b8522be5997c06430d56f913cb0f2928bd251a85dd70c5c60aef4f. 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/AUXN21721619.