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 0xd7dba8828a425774d4f9eb97d3099ddc1e6c0e48784b59790f0f14017d68f0db. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98511558-10e7-48a5-8e93-bb682a569c7a.json and https://artists.proofprofile.net/proofs/artist/98511558-10e7-48a5-8e93-bb682a569c7a.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 0xedff658571c019e474d420c619c7245edba56f3018e16b551a7df91eb25986ac. 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/QMBZ92482079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87d1bf39af8604eefb320cc210ade20a24cf1296bf5beeb14e1f7f4a25a5450. 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/QMDA62439588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae434e300f36cdf2eab3cde1548ffd60961015953de9b23d891cdb250a6229ff. 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/QMDA62439594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b27910cf2598c896635c94037cc53b36b71143140ee35f9931b28d755561576. 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/QMDA62439600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca00bca5e18ccb1abc500dcfd7145b4801e7781bf4bfe26fb83c02e39b7fa544. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA62439601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6651eb7726e8b823e6aefadeb7aff9689eb46e8066121a8116968ad10288b610. 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/QMDA62439603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedff658571c019e474d420c619c7245edba56f3018e16b551a7df91eb25986ac. 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/QMBZ92482079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae434e300f36cdf2eab3cde1548ffd60961015953de9b23d891cdb250a6229ff. 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/QMDA62439594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b27910cf2598c896635c94037cc53b36b71143140ee35f9931b28d755561576. 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/QMDA62439600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca00bca5e18ccb1abc500dcfd7145b4801e7781bf4bfe26fb83c02e39b7fa544. 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/QMDA62439601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6651eb7726e8b823e6aefadeb7aff9689eb46e8066121a8116968ad10288b610. 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/QMDA62439603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ce802a715539536fa9e2edb6bb415bdb30d102bd45a08adf5d5812a41539e. 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/QM6P42594954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef887222c1e4867e40391940fdff99af995191161a6e11b32984085c7e36980. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6P42594960.