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 0xd8ea69c8e15bff8a4d56117d4f2a5e2ba98290ddc263a96ac67a3d0d59228ac2. 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/bf2ac6c5-6d83-4fb7-b191-23d77f3dc8ff.json and https://artists.proofprofile.net/proofs/artist/bf2ac6c5-6d83-4fb7-b191-23d77f3dc8ff.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 0x124589876d8ea524c73f718dab11f9fc0a45a149ad6f03946a9a33dd3a447c46. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/ES5590601081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849c6a43bc1cf2416bae0bd5ab50a7e32f66df65fccdc2c7d006ea6f71f97a50. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:57:17Z), 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/ES5590901230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633094fda5b4adf138b2cf2deb4b494d95d68e4d9c7fea7e29f5d2f25ad24798. 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/ES5590901220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0d1e7fe1fd403be60b4a82448de7c2a866662b974a98e1fb6327277e1be3f6. 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/ES5590901221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2610744e3f674a9e176968184656423b3c4cecddd4c7488557b1e53f72d4b2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:22:47Z), 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/ES5590901222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060d76416925da081504ba4fe26580d1d5fa421f0273812fb6748a034614af55. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:35:21Z), 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/ES5590901223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4180bfe7b02646ee707d75647ac189401d7a1629f6a58f490d6edb3734db185. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ES5590901224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b8f03402830a224b711f2e327366b33b6eb0f75ef71312b30ae8722084ec56. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:41:36Z), 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/ES5590901226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bb052b5805e32fb9a0f3966943b33720081e1547682021dc2988ca002d4cab. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ES5590901229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36e1e7a6d82a59e5b739c7129ae37a6f96a004fd888c64bbaba4632e99eb810. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:22:30Z), 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/ESA012579831.