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 0xace8458b3682d54f53389d8af4d630f88edb9a56da9b3fe4c297e588d7735e0c. 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/67a196e1-a546-4c7c-bf6d-07ac8ea23483.json and https://artists.proofprofile.net/proofs/artist/67a196e1-a546-4c7c-bf6d-07ac8ea23483.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 0xa1f24b05d3c5bf4df20a15c71c72186dfd2e7ae4b73a267b690d67344cd2ae49. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES72323112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f5e4f853c3e498e30ef27bde226f1011be4d82d6748b384e151c233a2204c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ72377800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecaa4638688991a79bba2bafb9869124348299b2644639370be9e7be5c58904. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES72323113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7180a46bb0afa071da80eea4f5c11d94d9bdc4546d6e0b5bace928e3e02c7be5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES72323114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcc3ef558cb4da6b77ea84f8af7469dcb27913c0aaea3c36608c6d106c5d568. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES72323115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2039c9a19b08f15efa609a1d9e7c4ffe16d3beeea33e7c52b688458dbee549. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES62314609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf00cbcdbc9780ad5afb713a38ab579ecbb54da50c2f9b7b922f1410f1361538. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES72323116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6bf8e51f5a1772d0b25860220687ccc8ed373593f4f7f24b82f0e38302852b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:11Z), 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/QZES72323117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8b6ae34e6c56943f0e6e99edb0691a29e6a636f98b17df4548081c096f0f02. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN32296497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c561fa35bf5139c2914339152d15d9ded81ea1dde3b878b540966f8bfb50c80. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWS2367554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3164429d16dbaf56e0612bc847b7c86fae4f25a00e37620372e0bba2285b0759. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWX2206731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c26bae258d7fa18b3bf964d0122992f185e40b721e3b59200176c40639a40d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAU2166506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8618d1d446701357d138eb300fe5b3963475dc1b0a3c1ba4f90de41a42ca30c2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ32206504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8a8cfe001e105dcf4007ab3619a228beed76ca654c2a2e2f95963d42d90ae2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMEN2298967.