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 0x2e9953ded342bbc5bfa88fba31ae105e092c3a72cd6b4fdad1d8054209b57a3e. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/491faecd-8efc-4b77-967a-a65674bb7a07.json and https://artists.proofprofile.net/proofs/artist/491faecd-8efc-4b77-967a-a65674bb7a07.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 0x7f8ae7b6337010399a50626414df670a55a2a60a76e98669b11577dbd30d037f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:26:25Z), 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/MX2832433036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786fc4e95b082ae857cbef9794b733656065326a236f504dfc28abca2e55c410. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MX2832433037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc971b636bdaa43ccd97bb5f0d76a1f35c101575f57315ae39a1ce081c0fe45b6. 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/MX2832433038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fc846e1b0c812d6017bcba7104080321c1e68acf21799835350dcb330ce18d. 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/MX2832433039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad09047e2f7a098cef0cc93bc5847016fb324c13e3080299221304d24d6f4094. 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/MX2832433040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd379ba7308d74dbc4f69bcef6c0d7624761e09064296fec153fed6024e48dc33. 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/MX2832433041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9034318f4ec308e2597af86e2b11be66eb70b2b0228dc06c7b5a756e9796e4cd. 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/MX2832433042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ece30b7cb50870082aa7f932ebf830bc95fc82cd505e5247ece5a86c1ad94dc. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:29:44Z), 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/MX2832433043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c70a6bd6a039094255b45a11adef4f4c19d6ecb94d394158925d01e81b7c77. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/MX2832433044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47dc5577f482a304f5f2a33de59fd7d45dcc98fe4e7664079c20d743ff2920a. 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/MX2832433045.