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 0x9f0f2272d43e96046a3c2332f7735b7459f5472c2dc8fe502616abdaa32d64f1. 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/36ae4bc8-5387-416e-8f25-c50f9c2a55d2.json and https://artists.proofprofile.net/proofs/artist/36ae4bc8-5387-416e-8f25-c50f9c2a55d2.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 0xa3326df68d8e9876c17179f40cd74810a3b000da115a0e674ae727f4a559bb15. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH6541756376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51aeaee51b3fa8ed184feb5b98220b27d812dac404f6d2d62b2c60d1289ecc1. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:03:09Z), 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/CH6541756380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc327871665e4003f9447023d4388bddb3b16d0cd46b6fd0f5ed9465b0029a9c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM6N22098092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6bbc24244b8eb9ad380f4f9227d2d2e4c9b137dfc89f914a609609410ffbe3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMFME2060235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53102c39a4c0828d9d7d5cd1e799840f1ccc2e473a4c3a2c1306789c7e8dc16. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR59R2251643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad1339c0c6c18767b790bfa6657ef5a3ebae942755b70bd6ae790e78a801e48. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FRX762286129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff554a828885efc0bc69611547c48d9e46330fe9b1be9911819dcd1bb4b18934. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:49:30Z), 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/DGA052269151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836dc2b19d83a480144f8bcbcd7a0dd7ca7ab7f6025713c3daa8d69e107a4f5e. 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/FRX202212174.