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 0x4542ab2a643fae93ebbbc145b1a083ab746ad5b77960cc09a8ce9aabd8eba538. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78ad1f7c-5add-4ab9-a935-d7dbda467dc7.json and https://artists.proofprofile.net/proofs/artist/78ad1f7c-5add-4ab9-a935-d7dbda467dc7.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 0x412e55465d2e9afd30980d921db9a7ecc9e78bb040cb5bc4b217a7cc3c04f3e6. 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/GBSMU9488718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c65ce97ff704be495336fbd089ad8da1c3d94e4818568c617845db4f16b620a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZMER2159994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e7d081397465e53e488f07870528d9c7ce30dbb2ec376233d25371cd8f829a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMER2159995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a61117463e2a58bd34fb237a4e7406310fb39d936f4b5efb26e08c55c7cc7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMER2159996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac16a0e69ad5906bb8f833598fb85b03135cf0777daba9c540295955e858ad66. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMER2159997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4baa7cccd046b36eeb2aa660f7a7489846251a1b77f302301c4a542a9f9a9d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZDA82239933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfa1f50c0a5ea7b21bd3a4cab44a0a038945f867ca2d1f5288ca044d552ada2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:22:52Z), 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/QZHNB2239321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58f76ee62912ad3c9ba88d89e638b38035406d61921d9e5a0dbabb86b734e5f. 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/QZTB62234046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646eded3b34eb498245eb1a6ab775f6d26c2efa7121d43911543eec83eb6162a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB62234048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80b456e2e40501f183845b364bca2631ee0e1a431f353be2a662944d0062e9b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB62234050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34d338b84adfd6a45bb69028cf552b25a139a0f2b8a378064b16f6d947ec737. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB62234051.