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 0xd4dcefcf03adf91d01cdae8248051bc5c700ffd4898d80ea57fc3d1ddfe5a208. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/826f2ad2-3bc7-4e02-a132-ebf5514577f7.json and https://artists.proofprofile.net/proofs/artist/826f2ad2-3bc7-4e02-a132-ebf5514577f7.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 0xef384dc6eea107237052af158184e73572ec36d6864c36e8a8991200d366f486. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6G2359145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065a8edb8b28f7d509ee182300c5af181b81de4e1fd6f13d9af75cbd6ac846ec. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZFYX2452449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87fff7ff72009e5de5ee9a50918ab3025e5ecc6715536c55230da05154e85fd. 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/QZDA42474387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065a8edb8b28f7d509ee182300c5af181b81de4e1fd6f13d9af75cbd6ac846ec. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZFYX2452449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5195c5ebc5b8a6cc760c0c3b25fdf24e109465cfd88799884cd5aae94691c1fe. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6L2485893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207d0abc862a05e2edfdb8aff7f650722f1d633f3abfb0e5cd96a916dcb03ef7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:26Z), 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/QZRP52443906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9f5f2e08c05936a5b8501fef74f091fb3958d99bdb16dd64d6b0d45139773f. 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/QZFYX2523911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bcdde8949fb04ea9612002f6d7cb8d9d78bd82dff92501f648dc944be8e98c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:36Z), 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/QZFYX2523914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9238dea0ec57be2446a0e012ef4f1554dbe644dbef6c22b5803fc963c06156. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:11:46Z), 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/QZWFW2466878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207d0abc862a05e2edfdb8aff7f650722f1d633f3abfb0e5cd96a916dcb03ef7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZRP52443906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c4a2529cd2a45562f1ae4e7e2b1b814bf906b06bd9a553dc11943aa0323572. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:48:57Z), 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/QZTBA2527841.