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 0x7634ef07aff7bc133f37386deed46b6be62deb8fa6975193180921f50dbf0ebb. 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/55462fa2-6d7b-4214-b5ef-84ebb9f73001.json and https://artists.proofprofile.net/proofs/artist/55462fa2-6d7b-4214-b5ef-84ebb9f73001.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 0x0e15483b16c0fa51c748d49a8521963ad66b88a37b394be4a4986ab734d1a8a4. 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/FRZ082300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254087393485f8e9a07acc05c79e881f30a1ddfc6fb23077543e3d7db65368a5. 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/FR9W12414546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187533a6a4eccb0f155e978c900e54783909f7526b1c9be3b7aaef12de77f2b0. 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/FR9W12506234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0af5bdf8af231c92c5235bba5d58e2d31476e155a7ac197f58250a4c3b53043. 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/QM6P42305650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8765532fd15be38d2fa8c1d51378ae722fe6d6a1382edfcbc538b2de2e08573. 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/FR9W12140280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4816f606736bf2ed80f9d278e2ea11e48ac66fbf8119c4419c0ae0cd986812a1. 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/FR7O52300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c65a88dec56bd9111b576f1067a91ab0ad62379555ccf25185d3e7915cd828. 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/QZTBC2355947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1f3360652ed217329b7da15645ae8423aaa5633e16b162f32b59f39d3b7aa0. 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/FR9W12215765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4816f606736bf2ed80f9d278e2ea11e48ac66fbf8119c4419c0ae0cd986812a1. 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/FR7O52300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4378d749609cd02a9889d9d419e164eaa929029ad803541e72d8d9292b9ee168. 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/FR7O52300590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bf2add1e97292ca393eedc033b96195a13df616abc89e6dac9de51e06495ed. 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/FRPI62200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c09fe845e5159c963405ee29028f22cb750b663eb7e8c88fb3ef02514db9a00. 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/QZK6H2165530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4469c5c2c951a21795a398c73c1537e2d9344d73612356840b6945fbc49920c. 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/QZK6F2275274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538df0bfdde4a3e3550cbb2b3a68b4a307004c58c17c7601d7b00fb90393b3ea. 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/DGA052259475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50418ee19afe83b58409deed759f66058147d59391a36a0914515d579331a1f. 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/QZES82265459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d905a8af348662240f31bed7ea458df7ad7a5caeaf44598c6294601efc7cde. 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/FR9W12213786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb4949d652441519921b9e679360586b71c17808714e19744f831635d9e580. 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/FR9W12424887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb4949d652441519921b9e679360586b71c17808714e19744f831635d9e580. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12424887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a33188d241ffe54a812cd6afe06a160d431bb697afd81f0cf19dc726128407. 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/QZK6H2219976.