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 0xaa14ef03811d7bae5ae7a816dbf806441b8d4e0394a4d23e92e6172d72bfa230. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ac93fca-0d34-435d-9183-b143e22fff84.json and https://artists.proofprofile.net/proofs/artist/1ac93fca-0d34-435d-9183-b143e22fff84.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 0x31109087571e2075587e4bd3463739a0316417758a1ca1ba6a635c5e0a66a04a. 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/UST8K1845240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b315a8b6a8e56f8ecf4af7866d0292d53aff5b7b640d3ae826ee67466ea1d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/UST8K1845243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988025b093a3a291c33c0b65cd3460be916fc797fbaaad666f92d5b053688b8a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UST8K1845244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b950ed5456d307d6dfb78ab5ec47e6cc392f6688cc697b7a94241d45ba27e4. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/UST8K1845246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8bd992de65ec5d7fc73adfa1e394e756f222162b9ad5468c9d424db20b9a3d. 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/UST8K1845249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dce938a19f9291466c1d18167314c51331075c977477ad92238072cb098910e. 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/UST8K1845250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aed5b5bdb33266b5bd4d114a5705cae1aa16a2f1bdee13efbd1e1699d174e58. 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/US3DF1927479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27e9b69a601650878e4a53b4156e54ad63b37039a3aeb6adfeaa91d2fb7a29a. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/US3DF1927481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba2e4eae384984806037d7023cc7ed92b5643bfc0c998a6b790fc466e979f95. 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/US3DF1927485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56520e9cac8e90889cc1462700fa075006a2f23c07a317e0e28376fdfab333d4. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/US3DF1927487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd713c65234d1821af741799cd5cbb149df7437dcffa9ca7bb42f561ba35ee4de. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM3DF2128148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3014e9b7abb329d7ee3b3b9a9e77915b6d79aced88684862d51d3dfbfdc88feb. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QM3DF2128149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e78ef12a7dd3feff42ec1e7da5eaffec7477d10c447f674fcf048fd2bb2c8ae. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QM3DF2128150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc840edee9fe662c2126a27830b95e9ee2e5d6e4cf45bbea6ef9b1f7a30a47972. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM3DF2128151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e90538fc194f4e8441ed39a52174d9937f55931df914f5ebbf566392db6953. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM3DF2190921.