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 0xfa51b529b4df4200fdd94a81880f28e3edb30cafa9d85b46e02fa6a65a0a0a09. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ac20437-5ec6-49a2-8868-bbfd21a837aa.json and https://artists.proofprofile.net/proofs/artist/6ac20437-5ec6-49a2-8868-bbfd21a837aa.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 0x9d2123a2cefba7895cd178fb7146882ec87e57cdab74addd2f54a96f687bd621. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:04Z), 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/QZK6F2472650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e386dd205df07a365bcf472b411f84cc64adfefbd4975b856180b8ad9f0fac. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:13:05Z), 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/QZK6F2472651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116411e8bd6fd9c270a5c0d0d648f09d10884cbcbe307eee126c638d895f32c5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6F2472652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e3bde31a78e8532160321dff7fda1396f2c972d1b144674706afc2d7002a4d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZK6F2472653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ee6162814e0cd0ebed52502dc80fd0c113ba96dfde926c6e73d015e07fc04. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:50:08Z), 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/QZK6F2472654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb140791552ace92e49e6b21bd8ec5fb4ba8a1d3d40c98381692b1e3b2708a5a6. 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/QZK6F2472656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d287cb2575802612f63119c23b735fe5410a9a91a21c87dfc33a5769ca5d19. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6F2472657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cd6a12d1b80bbdee48b301f7edb992ce8ef13a53eb886b3ee9601f0ae2c491. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZK6F2472658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40b732b353de5b8ed19ddd1d4927b834004e591e680c0025a0b4bd30baed461. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6F2472659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1012157734d3d8770a937e370500a6bb63784731f5d2e16a52943c7b6fb75135. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:07:11Z), 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/QZK6F2472660.