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 0x4ef558265af2d183f97bedf4d2f022bc9ecb1e4f24fe495c7444aee5fd3b7696. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e60aa3cc-3fc3-417e-a052-f93d4bf4001b.json and https://artists.proofprofile.net/proofs/artist/e60aa3cc-3fc3-417e-a052-f93d4bf4001b.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 0x833ded7e478ed0ddd1e31dcdd1582321d8ceb2897011c5dfac44cefcd2f23b0b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX8LD2597838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb845421048638c65a282a55b44be993262b8764794e84e84ed2a8893f8af5a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX8LD2538802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b84e288039b146e64ca6e82ac281e2de09a1f93aa7f918839c0fdf29fc01f9. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GX8LD2595111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc133a08bdb176b0a8263dcb17d31444ed5ab06541bcbd480d8678d0386921679. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX8LD2555230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c2073f023cabe4aabc0d7c5f128cccaa31da083dbca9dc34277f05be2c2589. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:04:34Z), 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/GX38U2536321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a481a36cd5faa4797fe067cc6d8266708a0fbc5f0c6efd489a8be8d0a92077. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX38U2571996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab194ca7e31e88301fcfcdacf1a769f25ae18d82b45481d3fd58c2603ae4479. 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/GX38U2521747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe150d151c53c1dbad4e6f371f773655cf3755849797af34565df309dc837cd0e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:41:59Z), 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/GX38U2593727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0379eae62fcb41e604660a69b4b888416a036b6ce317d073fcc4cced035231. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GX38U2501094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fed770bbe15a2a2d1baf34ff725ac6114e8d41633c9537429ace0e217030877. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX38U2582623.