thumb|David and Goliath (1888) by Osmar Schindler Goliath ( ) is a Philistine warrior of giant stature who plays a pivotal role in the origin myth of King David in the Book of Samuel. According to 1 S
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 0xf473105bdd4e9482fed956c6b0b4fd1293b9834e94395b5df0e646005b239f49. 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/0b69c4f8-343b-4678-a755-2701ae9925ae.json and https://artists.proofprofile.net/proofs/artist/0b69c4f8-343b-4678-a755-2701ae9925ae.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 0x2bb914527a29e1c9ce45a4824dd46e8adeb07afb314120e94fb6fe6ba52211a6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IDA510900282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00050c87135c1e3076983828846f4fcc25af7985a80001a6c1ab388efeb7aa31. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IDA510900285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3821b6588dbee9628387807a7d7051a890a4aaaa462029e3d9721e11e8a13c. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/IDA511100432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa1a34c38f4bf54007235697a37cf73aba53b7bc617e38f38ef2f03b593cfe3. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/IDA511600616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5661a427a512a564d5ce8e02e170aefdec75c3f07931011c5217da3f2b4a1e1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IDA511600618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f2d5c3c9eb5a6dcca3093b2c8b2f99504e54636117ce0481682aacf2dd2056. 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/IDA511900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e82e69bb2cc0d1cc658f539353c6853f07d79157aff55d3297dfad9cc643189. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:34:35Z), 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/IDA512000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39631e578bcef583bb0ad3cccbf5fe1236569bed69aa40f3c8b23d78d5a7b0a2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDA512000058.