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 0x5a217bc41b7ce1e334c524e2203a804186039911c0cac61b4c4a99d27460c59f. 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/0ab516d9-f3a1-4cb6-b331-909c492756e9.json and https://artists.proofprofile.net/proofs/artist/0ab516d9-f3a1-4cb6-b331-909c492756e9.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 0xd2d31d3e41af3a0eae3a5f10accbb11c700a2ec340ef2295f3f4342dcdad77c4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:31Z), 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/QZPLR2258961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd3c19aae2644c5b5d7ca1c66665d043e9edbfc2f1a578de111f6a1f6f82c02. 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/QZTRX2358974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e300bf7d825ed6aca80a75554be8383d76f6e60dcf61d9b998a604682d36e45. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ5FN2416253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7dd18b391ebf5b29625abdf168ac91a1e87c9546eb8b56d7259ffacf374801. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:49:00Z), 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/USLZJ2430004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f49fa4b4e0439dd3024952daec5ca912ed7d46486def43706910af6491423e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX452468214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81f38443254709f01972ee316fa4f951d79b84507ce65ed9ef646a6be644f6d. 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/TCAIN2410296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed66bbbef587f8347d6723dfe564fcfc1d0ff5c4871a74d936c2df203b9f6a93. 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/TCAIN2466594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f57acba771691da3872e98532117355a09630b3718509bf1681b8aac7f7440d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAIQ2409770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269c643b4e23a924584b7fa931a0a6963f08065aed7add23a496724152dc1b5f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCAIT2493053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cea33759f57feb65fa449c0d3cc432e46418ddbb0a1a13ce047227c06b44192. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:19:24Z), 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/TCAIU2454380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20a61214ea157c3df02c025586e63745d1d556bfab9ad52ec0e65c1d5a54619. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:28Z), 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/TCAJB2460731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecbf3bf75cc0faadfe2e37fdf9e7418dd319d3004766483196d63cf56874f32. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:07:27Z), 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/TCAJD2484060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f6746b32c049092c923a7314a76728dd5bd9bae637e01a9b14d033a043b4d3. 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/TCAJK2584281.