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 0x4bc29ad0d76f3731874c54a61a2f2fdf2bc4e5750fe1e6661cfdf94fcd1b6448. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/732daf17-fe7e-47f3-8ead-ab535dc21fea.json and https://artists.proofprofile.net/proofs/artist/732daf17-fe7e-47f3-8ead-ab535dc21fea.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 0x92479e53bcbd6f6dce89965018755ff2fb7f8b2c0bc51d457632309c71b69869. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZK6N2078994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbd7e5a067cc3a1cac1cb9de1e9d0101d1cd52d4110673fc648429912e8fc82. 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/QZK6N2078995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fdb5cd890ae4bb52ba67778a9018ad74a154b4b8e6560ee52ed34327514d81. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:43:46Z), 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/QZK6N2078984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76150d825d339f618c6d5ed8fc66b7066ad12cc80b6c1551e60e0611c33e1e89. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:09:54Z), 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/QZK6N2078997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e3e2f23fa7f9e624b5a0018371a273471373f8c0450cbe6d705952703243d3. 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/QZK6N2078983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f5a8e5d99acdaab1913238097c6599e60f30e456c310a19b51825374ea175d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:49Z), 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/QZK6M2032961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1f13db7475af925330035bfed66265a0a690d574a3eb78e01b575c6db27950. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:43:13Z), 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/QZK6H2042884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3627cc35f54781c5756b454fd83b718bd7fba06effab50ae5c6caf6e50458b1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMEN2041455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33f2dc5ea3203e3b029a7c98f4c5d93af031228895ea2db6cd4b270b6d23cd7. 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/QZNWV2079021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400bffc9f1a8a279c3bec94f146ae0604614cd0c6ce80f4b129ca21c233510cc. 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/QZNWX2063943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab954fac1878c4b07aa6730072222a221bcb85d7250448eae1b54bd9997ab94. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES62170475.