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 0x8739b34141d4d51ac4188a9dd56c63ec4ee7f082e0fdd45239f4c41239a0c3f6. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/435701ee-1aee-49e3-8a82-681e4a2e96c9.json and https://artists.proofprofile.net/proofs/artist/435701ee-1aee-49e3-8a82-681e4a2e96c9.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 0xf219d46b120ae4cf52e687e2ea1180e5b17ac5055da599f635dcfac52d31047b. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/GX4R52169498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286ea8dfe4bdc6ad63ac5541ee85b6ee4fe73151fce0fa776a9fe57cf4eada31. 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/GX4R52169500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d69dd378b64f6e515d886c15292c1fbc4112779440ed98175fd6d812efd257. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX4R52169501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71795054f519667c1cfaf6c57dd8ea05636fb69082196f238e74fd6a2241149d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:56:36Z), 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/GX4R52169502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd586d20c2ac21824807861473c1f24ac87a4200e634a2c1cc183bd7cd153291d. 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/GX4R52169503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341ace3b49db1c3f8d4fb0184b077f159386bd99791ee5f058b06891e3b954a7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:05Z), 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/GX4R52169504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc549fa6ebe8b411ee4a1871103dbc03d09cdc01ca44d989623c917a4c944d75. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:03:31Z), 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/GX4R52169505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cab57522ce32d81e6c592922e7c32acb01f785eab30c69a24f831fa5a71c64. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GX4R52169506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c68a2dd94793582a18e59aef3559df727cca888f22be9c1e9aa7ea080a52acc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX4R52169508.