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 0x1f0a8ae43a555aa8e5e7662cfce97ff8940c2fe23b779c3de82c5c9b43ea2de5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7553943c-4fdd-4947-bccb-10019d913aae.json and https://artists.proofprofile.net/proofs/artist/7553943c-4fdd-4947-bccb-10019d913aae.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 0x39c92e46614e3b33fe08f7e02b7bc7bb18d5b7b1109fa34d650dd117afe0f8a5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:22Z), 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/GX3Q92499465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c6c11a98cf64908bec24eee3b62ad7a5165fa0532a1641ee338c5695e8123b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX3Q92499504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64d4eea93bb632b1ba817d468aedfea17531a9e07e18553383b27975861ae75. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:19:53Z), 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/GX3Q92499507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7acd0b82406fa41a0448f9da29b354942cc12ecce11ced53de382a402c0659c. 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/UKXN22445234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d174fbb64c0869681de03cf07a1423b2e72872c97ba87b4e729d8fe38397582. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/UKXN22443632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588aeaa6c2fdb8836db2694e2b24c97e8ff125badb4cd5b6697ae98712fa8084. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKXN22443651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ba3d3d4d20e79ca7f3cdff38bed9f1ba71e0b3f7daf421c30f0d0970e8ea74. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKXN22445236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066f1811f232b43ee89e380c7aa7b1e616f22a1340cc5035d55c310fb2f19d87. 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/UKXN22481508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39021aa286317770cd3fa621df95391728102b0896e1f0295b3d2c38f9ff89f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKXN22481546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3c472375fd0ab0a155e56e19a7f51413a083917b85fc4e26477063c035c8c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:31:02Z), 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/GXF9Q2599066.