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 0xb8f3322912bb048e8845fa59e9a6d32c6ab6ccb9522b2f03ccc51e5bc65d6720. 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/b6bc96d3-1b90-4b2c-8a67-3f81b0018342.json and https://artists.proofprofile.net/proofs/artist/b6bc96d3-1b90-4b2c-8a67-3f81b0018342.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 0xb637d596ac4a15004b006235e95927430c074f776457d2fb2b2425b2a35c2647. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:46:41Z), 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/QZFYW1904038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33f38dc5dae1c16d971a0bab5cd7085fd237bd2427321b70a64cf4b89f933eb. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZHN51973312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09e58279f9d7ebb8cbe900f87d1b0867380faa9a2745cf2efd0471a095ada3b. 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/QZHN51973314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447eb5b2f92b30a565b963628e267fca8d36a4324512ba5ab64dea152ae6a973. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:23:35Z), 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/QZHN51973316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5d8d662306c17f397e189dbc68dc41316df39b598100b8a7c636a0aa6d881b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:01:40Z), 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/QZHN51973319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c0dea9fa41e476ab58a24c94b531125e5562c05479d9b89c2b00d47c36ce5a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN51973320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cea0da21c6fea6f175e77b3aa1d84a8135db4c1a321b3199436ba17dbfd8df6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ52084427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6a1e5a60d3a54a71202366874fd55add5febe7fd07dcdf5af09fd9700c73fe. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FIUM72100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e15cc4275f17cbe554a1a30b1e99134a52ba9d705f3f815ea2aa42fbb45d047. 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/QZWFJ2314552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14731f76debaa9237da27e0592717842ba370f10f342af6951be7978a8fb1180. 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/QZWFJ2314554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d410094716a75668ce90778c77d37b3fb42fd43cac5bab2e0743ae69f625161. 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/QZK6N2088201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e8b3accd7ea8fa20c4abb8e05e4e1ea529979c856d8ac63175290a90e9fe8e. 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/FIBAR2100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7d45a069d7775d703e7228a249f2bd315c46971f1104f0e43d813fc572252e. 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/TCAEK1913222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46af82ab31579ef011e2575ff41997fcf5efe6becfce5a17ceab7ea41fd570da. 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/TCAGF2297680.