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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83c847593d550900e51a3c681a528b7a18a81a65237f98c9f767376c199d3b8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/156659e1-cc4b-4a00-9e7d-26c39f8c530b.json and https://artists.proofprofile.net/proofs/artist/156659e1-cc4b-4a00-9e7d-26c39f8c530b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be9e722fc2a12829828763ec520a95c4853e4c7293533f4cfb7243b146bf3d5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GX53U2418601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f6328cabf6fbc19e89f380872498c1eb8096259e64812175f3363cec0fbb07. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX53U2430463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6050e5ae3823b9de6e35e5eaad66ace03f152e6f9c69f6e954ea3e29bf6b758e. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GX53U2441123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6facb396d6518aced2aef2d2090e3136e4b4a44527c2209e5722ae600f504af8. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:05:40Z), 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/GX53U2440222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021d8253670bb640e2157ddc0c64b4699b224083e795aeb719e1cacdd238e1c0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX53U2447729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aadd2eb494ef5e0e8aaeadc043d1f3864d97e39d22e9ba93515b765d2cc370e. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GX53U2450647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4dc4f0adf7fe0e8289aba19f94526049671435a96ea3e0d1727201302a0212. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GX53U2450014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0e2516c35d20d9f2c8e4d4d33077834da1080866a4a9a8480154c7323f8c31. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GX53U2450648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201e87bfa943419a564bf83a99aa8555a877b7328c198a8782e7b6c0b3a6bbd0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:52Z), 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/GXF9Q2583256.