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 0x49be6f3aa99394afb8898984ad37e66b7e70c82c378a364871cfedeb0c328259. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcf14be1-8652-4c09-9564-79afb4f711e7.json and https://artists.proofprofile.net/proofs/artist/dcf14be1-8652-4c09-9564-79afb4f711e7.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 0xdbeaaa7435117340c3cd5c9ac2c755b23502c2298bd360bf6e31d2208ee5d2aa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CZA751048204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727b2751fdb765fb289c474b43acfd6d22014b28b6be8357540a703634fca5e6. 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/CZA751048205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf011445064613f3fde46febd1c76963707b7d75d2a7c1bda55e8e78e88376c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:20:48Z), 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/CZA751048206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69000595cafd73ecf94fef0418db4188bd3177b11225703468999dd74adf16da. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:08:41Z), 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/CZA751048208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53ec27fec613d941c5dbafd3153f3f7cc31aa1784f4285c9537146eeebbca40. 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/CZA751048209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3396a4e195e533a2c14dd8b34bfb3064ef2bb99ea5a1a945d4cb47cc68220b7. 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/CZA751048210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bd9befe5bcd921cdb66972da081547bfe87c3bb031915b78b8aef73a082f6c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:21:17Z), 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/CZA751048211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47044f0964c9854d95125333b1bc7f5c121235118dc523ad882380bee91e32fa. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/CZA161601635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde42daf585f6ef6b16f53f61e0c4d9970e0a465ddda535fdd0e835c0c3f3300d. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/CZA161601642.