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 0x8bd21cf580c9b1b50f964596bfecfb28ffac9479e076761ae9229546ee95d8b3. 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/e7ed76c8-bbc3-40ab-8910-631f0f85a5ec.json and https://artists.proofprofile.net/proofs/artist/e7ed76c8-bbc3-40ab-8910-631f0f85a5ec.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 0x9a84278fce2f28b51c485e7844b321b6bb84841f7f93fc1d0abdfc9ab90a6cb6. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZTV32455820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5298ba794ad9283e46af96e6195bdce09dc9b454c27bf5d898a264a19c6b1a1a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2043966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffff60bfe719b0812ec3ccfa02f077f1cda8c2b650d66c0687d2e7ba0ac3a9e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W12239932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd2141338ef65eab52688c8d7bb7e23442097716500b0afb61ee465ebe260f. 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/FR9W12239933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e6b30e0e0d64be3c67f25097c6e39c48a11d6f0902b509ce9a9c7be751982. 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/TCADQ1809658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d6cc6223ac9e15dcecd1d3db50a8d8674242284ddb74682a5c4b3859c7b25f. 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/TCADQ1809662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf1b14482f04a19e7a31e38d57416a7ba4c2f81d8eba334084a8b65c1c8531f. 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/TCADQ1809670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39957876127699dc6a72e17b6cc6213107bcb38dd8791ad0880eca670be1dba9. 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/TCADQ1809673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e6b30e0e0d64be3c67f25097c6e39c48a11d6f0902b509ce9a9c7be751982. 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/TCADQ1809658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe054ab723dba27360c722255105800130c62d7132db30320628484e72231bd32. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2111866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2103968fb8beb6ac845db227a14f652cc6624c34b199c8fc38d12a0b9e5ae755. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:18:24Z), 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/USCCW1611166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5298ba794ad9283e46af96e6195bdce09dc9b454c27bf5d898a264a19c6b1a1a. 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/USA2P2043966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4f2ec424f0cf2864edf1fedac8d7bb1432467aad6e1cea5bd5792db7855bd0. 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/USA2P2043965.