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 0x9e8bc460227ff79b601a18b1befa915ad80aeb18f153d574f75e555835c19c29. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4365a74a-1e29-4a6c-af2e-7278259b5414.json and https://artists.proofprofile.net/proofs/artist/4365a74a-1e29-4a6c-af2e-7278259b5414.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 0x5ebcc00ff4da03af074f0e05b4c4acd552777517e86957bb894e9f18dad85bcd. 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/QZWFV2412319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7ba98369338230202c6179fe383586f676697966390e4538890dbc6db073ec. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT3F22468743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3ef2f54a475066fa03d5d376a37f09ebd54e3e50e5cf493424aa5046384f4e. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZES82542441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd79b2478e8bcf318dcb9f7fc988b8ec8dd25ef4c765fb10b2c8bfcd5cac5ef8. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:08:04Z), 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/QZRP42518284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65d78e341a4a0dc71be634b308194171ca378d501eb2eeae36cb709f35250ef. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAX2535261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969ddffe22799daac289972701240b20199be49fc584c37af201601d9a97ae97. 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/QZTB22541465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b34166095e4f6e51abfe32a362bf0a1ec654930e640b371b76766586b11ac3f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB22541466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3334b41fbc8b90db2c44b4cddace0ee57778e3b3043a550fd79d4ff2fd3237c8. 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/QZTB22541467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f25ec1ff17e58944e85255c4852674920fadf7387729939b9e461775066f1d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:42:07Z), 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/QZTB72582336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4633628c798a67bf1001ad29ac954096ab98673ed2a10fdbf61a09f205540801. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:33Z), 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/QZTBE2545588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8881f928190051230529e420e1b7641ff6fa114125341585e2ccc3bf7a1656. 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/QZTBF2563664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bba072b34445988333b9e81f81b6d0b138833b95533415da5c778a3cece598c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:23:58Z), 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/QT3F22554349.