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 0xa8dfe2d915601469a2e9fbe4650ed4a8396be1d26daa78e166acd2fcb126b85a. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0e2a893-f498-4c8c-993f-f1576ab17801.json and https://artists.proofprofile.net/proofs/artist/d0e2a893-f498-4c8c-993f-f1576ab17801.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 0x933e330d3e99210152d1cba581dc90ad56485acb2e1cc0b17382bbf1e9599cc7. 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/QZWDW2308763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b311d9eaf73569d59b60db6fbe707e8c94cd1c6532ea2b0a0682e0c14caf914. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWDW2320359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaf67b7829402048392b4300658323bb89488143b0eb1c508bf0b77b251d425. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:20:56Z), 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/QZWDW2336832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa328c5c613eb7f651a2fa7556ac30029e4716ade0d0d7cb3fd31c8d60f73d29c. 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/QZWDW2367186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb8f02cc73adc61ca56bcca6ba1951671975f8d71e8fba115d4e6fb0815593b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWDW2379754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a879d38a53c0ff8e74fb4c832f9c876b3d420ae1bd25fbe943e3b629cd88f3. 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/QZZ662311545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53b222cb2a3904b6c5ca4ae63075b93b15c5ea87b810d9618a61250464ff458. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ662316768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067e1eb5aa4d2a71c26b84f6b1da03ceb338b1c7dc7a44d879481ef3b0a25c69. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:21Z), 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/QZZ662454933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06aa4cd35edb3c5167092f46a881627ed61e8144ec316a402e992f1622e00d4c. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZZ662454936.