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 0xd0c53f883f84f61c2ff12cbc74489ff54a6ed16bc8fbd8b4a65d31c80ba3ed64. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96e28eb3-a42d-4f28-b553-31e58aaf5c39.json and https://artists.proofprofile.net/proofs/artist/96e28eb3-a42d-4f28-b553-31e58aaf5c39.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 0x4b88432bffea416541b0cf83d9fbd4648cd6820497496917f0fce04a9d927dbf. 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/USCG60550363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2899a7ade7f3bae18ecde337f663e0486d43fbfb922a9ae3d4ef0539ef7609ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCG60550364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4355fc031acc11e99920eb7119def03c2b72bc1775f7ac2a7bbdbe7821e80f6f. 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/USCG60550365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde62be2e7c05ed6428bc6d2c8c254b54103ccddf6a5186434cb1cbea98cb0cd0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCG60550366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0c6553ba4186ab8ed0462fff69453a69ce7a3499ba743221c151fff70e310b. 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/USCG60550367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dc0112bcb5354662099af965ae0b83f24f431cbabfc698aaa6297e19ebbfa2. 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/USCG60550368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c30df8395c1f17b35d73140a6f15f32d5263ae77baefd1d7950b78fe7bb462. 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/USCG60550369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbee9a0b7f3c6a488a4bb2f772518809d887bc0dd6b3a65c596d9e1a9f52ea85. 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/USCG60550370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c56cf998bc0b71e9ab22a15cc947a830828b1af0a2bccfd94c9c2de6c30f45f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCG60550371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa5c477b76a00c8a3fed0db0da7c3392290b2e4ab3270273fc80ce7cfe02af6. 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/USCG60550372.