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 0x3cca939b064a0b3a0437e8604c3bde99ad9db930e756199ebc74ec3950284e9b. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e378a5c0-b452-47ea-929a-398bf4c78ea1.json and https://artists.proofprofile.net/proofs/artist/e378a5c0-b452-47ea-929a-398bf4c78ea1.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 0xc705d636e511fd2d09a44012139accbefb75121d020dce36dfd969708846cc89. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA42593160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf88657f144dcf40ef7059ed1db3d7fbd17c8c1bae6de97148b6d0c883817aca. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNB2562780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa848c844b9322684257ff6287e6cc450958757e78d3b6d59d3e1ac9800943971. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ762473151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf88657f144dcf40ef7059ed1db3d7fbd17c8c1bae6de97148b6d0c883817aca. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:51Z), 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/QZHNB2562780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64526ee02d43b9df0920592cd705f98d3498db0b95d2fbbca1cf72ad7e638c77. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:23:31Z), 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/QZTAU2575236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c1971eb0b69e3ff3e359e8be1d6cdcb633c77295f913692eb37808e58588de. 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/QZTAU2575237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e6767a83354afc232c26dc9d441057b6d9aad6fcf819476418d97ca5fea51c. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTAU2575238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca279bbfa15b6c352fd8f17ed76e6d9831f1cf532bc73128afbf51faeecdcc1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAU2575239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797ed0dac81ea855c85a59b53ea03d223272cc5c66bb5e83fe4cc536bc11dadd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAU2575241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eaf8515b909700955d49e31e022600d0fdc7994bb50139b8f807f11babe499. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZTAU2575242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32017ef40c5c5034765220ac707a1d5a896a51a0af70a19536a3c0a459acd9b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAU2575243.