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 0x59ebfe378dcda97e75896d394fbb852dd0e32c5cb00a43360e8bbb836c751838. 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/700dd91f-4f33-4222-aef4-d97a86ccf421.json and https://artists.proofprofile.net/proofs/artist/700dd91f-4f33-4222-aef4-d97a86ccf421.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 0x8439012d56ae302d6aaa9699525028da8d1dd967b5930bf2049b0d175d24ad71. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:26Z), 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/QZNWS2142887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe941593faba2e63a08d17350393990d9875bd1b2a08575a3febb7038909fbc03. 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/QZNWS2142890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389156a95916182410bdf9d9d8572fba7afe6490abc9298726b3d443f21a7077. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:30:50Z), 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/QZNWS2142894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101ce714a2b9d2fd5fb0eaf0ece142efb64e3b119fd7ad8f741028461c447ce4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAW2285345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972bba0a66ad93d3fed282a457b971b401c7fb7193a0d09e31472e51fef5d8a6. 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/QZTAW2285347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69b5e3ea3ac626126fcd31dee90acb0a9dc44d4b2c00daf88f8f6fe3388580b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:48:12Z), 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/QZTAW2285348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4850d5b7057ad19348f025cd3eb78b77b8d507d10ac12f10203da28a6f01d087. 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/QZTAW2285350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc241bdf8d39c8be150e1a3784d813ded037600b4cfc4df984e0b5c6d2836e759. 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/QZTAW2285351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc5abbfe23e2ac87b447b4cca61ffc0e98e0e1d74947ee43ae83f9b1ec6cd1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAW2285354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb2ee84b13b4d265a0dbf7790ec9f395f8e4de7c5d1fb50a6bf8ec2870305e3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFM2361739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eeff12834ccc68231cd6c37633be282c97b2c55575ee824d275697c282e957. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:49:22Z), 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/QZWFM2361743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91485ac1b63b047f99915037ef6e153daf1d5b30ac4c704413d5ad8c061bb984. 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/QZWFM2384574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042091d31d0e477ce09e696adcdabf7674a31e2ad6e187de95120d86994e0171. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA42472454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4266e83601a5c7ae11778bb217fa6866bb0da2f431ae735d0bdd0801b6067554. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWZ2461186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e7f80dfff114c78b4760e8c17f97b065f8ecb3347214d6c1b22e79f2bafd9e. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZWFG2488257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d2b959b61ddad887b06422fdcf2489c60cc970b221bf18280c737ec61b6edb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA62562308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb88bd5fa9043e5dadfc35e7f38d645485c2cbb5ea4a690562bcd13de1870ba. 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/QZDA62562309.