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 0x8e05cc4a04da0c5dded501ad86dc1a03cdd2dcceeb9d17113bba4afcb61a38ad. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2de0cbe6-e160-4ab3-9809-55720a357317.json and https://artists.proofprofile.net/proofs/artist/2de0cbe6-e160-4ab3-9809-55720a357317.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 0x3ef7aaeeb95f4c4f45198c7a66ead7f923c1ee9be3b4b924b8cec25aa51d1953. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CH6542121797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854f2c775e70b09e876d99595a9c8b461d7d763214676ba15713aa53aefb6a0d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:48:30Z), 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/CH6542121794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d58ab67ad0f6f6e8064b95b2a3f03281d92d5823b74b6b108073e3df2cab30f. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/CH6542121799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e064ce849b38d832c20a2989b5f69c3d64232ab2710cc07bbcf53d876f6593. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/CH6542121809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefadc239d37ab3e91cd8a232894ee48fe5210adb5e4322bbacf231954155f564. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CH6542121810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef235aed338889651e1ab424e6d12745df97d67dca5e149b10834628bad55cd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CH6542121796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c370d35d03605c871ffeb037963af4b062042c0936985b7adb70f402ccb8bde. 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/CH6542121811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bb123bf546f1b60b7e0e5e79cd7f41411bef8e4cfe1e7f117e44756c34627a. 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/CH6542121793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f5589fee172fea0d4fc6f02bd211813b497e685cdb9aa0ba38d4fc23b8997c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:49:37Z), 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/CH6542121798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb268058fce72923bfb6f0e24a6ab3493b9f78ab5ff2d3bd297ef0627cb7ea63a. 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/CH6542121795.