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 0xcc1d8262c132684ff4d6ed4a9704afde72d26c16c0cf611570a5be8fa930fbb7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b5fbd8e-3b97-4b50-b2f2-a6beb236679a.json and https://artists.proofprofile.net/proofs/artist/6b5fbd8e-3b97-4b50-b2f2-a6beb236679a.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 0x8ef797352b3d1d90d52caefce89722a6888b10b5679ec0f3d380ae1a442341dc. 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/QZES82316425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055939d3ef67ceff71295937f0e53934a6db14845e935fe9cfe4b26fff744a7d. 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/QZES82341056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad4143832ade1141039b85cfce15ab75a6e997fc80b62f210e6af2232f3ff0b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZHN62348886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c46d3c55ea14a8150d04785d9e4ef7b199a5c697f316087d6d54325b3a532. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QZHNC2358004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda49ce7e646d8b2c77f984e748af8acc5cade6e5b12f25e1c33d76b27095b6e9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:35:35Z), 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/QZTBA2329916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be740f2ed8fb886887bf2aaac3a98e0fdb91feeceaa263018fd386330fe72a6. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZDA72452596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba3a26dd2e487161fd56c196354c1027bc7bbc260bbf1985ac23034f693e605. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZWFM2492482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5698869973879cf7b16e1a63d4e0256ac66091620d4b718a306a50a4482198e7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN72570540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316b3065f63ea5ca70e591f2a845593d390a0e5f998707ce6b2688e2e6fb971e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZGLS2519237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787c23e16c746ec534f6fa39d50e10c383eb92779b806924563b5ee59048ed77. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT3F92589752.