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 0xddaa9f95ab391b490c565e45ee48f5ded09ebf65193b839c8759f95183723252. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c874328-3424-4bf2-9d2c-77d27e4a12f3.json and https://artists.proofprofile.net/proofs/artist/6c874328-3424-4bf2-9d2c-77d27e4a12f3.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 0xaa887e68cbfbcf1138ef2d7489843de65a0e242881724704382deb52683906f9. 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/QMFME2209874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabc2eed46e0aeb12178a14a7ec160f91215c4011620c1d7755caf972f4baabd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB22317388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa887e68cbfbcf1138ef2d7489843de65a0e242881724704382deb52683906f9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMFME2209874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac45824932b90d6335cb3248fb96624e30f11f7c9f7c725b92ddbace8a8d9fe6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SGW502353256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabc2eed46e0aeb12178a14a7ec160f91215c4011620c1d7755caf972f4baabd. 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/QZTB22317388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d59edc08e25faf14b9d68ba2097aebd7ae5625dba0c940f39a136aface59f3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB82312532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf447c56505b596eda5e0858d0616cf9413e15ac31e1e46fce4c31892a4e32f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SGB502312565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8840742296fb1e05d060cdffe85d4c56bc13896d1fd38b286e69529b266257c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NL8RL2420715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82eb0e1397453fbf5f9abcc5cb5f10d1fa660ef66493e603c6ad5d1a6db15c4c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL8RL2426102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc521a05b7a9ee21f7bc3bbf05f89015e3ba464a51f8b83c796a421a75afd5197. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:31:59Z), 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/NL8RL2431548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc112edff1881bd76d6b890fed56964558bf742a2a8495dc15f2cbe35be1803eb. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:06:39Z), 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/NL8RL2523874.