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 0x19995700d43a77e966584a7f3a0cae7e82945960396d4b486857d7e022f0fa7f. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87f182e2-46ec-4ed7-9053-8551995f5657.json and https://artists.proofprofile.net/proofs/artist/87f182e2-46ec-4ed7-9053-8551995f5657.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 0x61aacdd441d30a0732d14c2c3fada9af52b4621a48c59a74878f36f8102a0ce2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5BU2474829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610189268384e113e36c5de132d0e5f733a2a6cd46c3a17d44bdf2b0961f444b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE6SA2457143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543822cd05bdcb346151132d822edadbb0d50aec4964bf3d3fc34ce86447cbb4. 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/QZHN72575187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3295b0f7c6276aa4ce4274653994cdc4938145b216c4ccbdebefbb0e2a624939. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE6XY2578110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdf2679ebd7163cb05d1baf0112fdd2aed89253c2c5ce128c0d7c2217861b8b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:25:36Z), 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/SE6XY2578115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6bc507ef642473159f50290763e66487a9b3957b30becf0e820ef4a957ac8d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE6I32520598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eab7ca5668b503c6e4016cf94067aa9cca444b8e0227a512f5d2bae97ae0e82. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:02:40Z), 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/SE6I32541792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105334fde1663dd37a971427c18d2142c60e33120d5801e18ddc16bb7a5f846e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6I32541793.