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 0x68051bce23a76ea0cfa10d47ceec3beecc269516456f5ea574a92904a9e3bd13. 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/02ec30b8-fad7-4a5c-8488-5d1a21cac98c.json and https://artists.proofprofile.net/proofs/artist/02ec30b8-fad7-4a5c-8488-5d1a21cac98c.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 0x2e53c1a625782686e12508c40737795cdc435d2bbbbe8c05d8759dc688938cea. 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/QZNW72392198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6828b0e82e7277ebf88e82f8ed464ed8c955955b622d5186989ebd3bd65b70. 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/QZNW72392182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0971b3f776000abadc81facda106856d32c7df418bbd13df12600cf0ccce325. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HKD012413093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e314d5b5cf526bd26d366689c763d2a80ab5785e6014ef91bf6c9463e9191a1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/HKD012413026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b4e79cf87506efafbef4497dad052a3366a82b807ddff48c4ee15a1c3a133b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR96X2347865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbced85191da81e958e66567b0622d63dd46aa9dd46104279f122859c726c9a5. 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/FRX282359575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e0098f0290d67d5646449c7c0b07bb9bd1ef8e435c4fcb65a463039fcb4b40. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:55:38Z), 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/QZZ972343982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d9cdf594c304be866665a296d5b42a84ec08f1b356f1878d8e7eac408c515f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZZ972343979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d1bea11b281b964991a5d80406991557250c870ac7ae7214aa14eff6b18b35. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ972343977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c1ec9898da47a2f05b8254ad7857f2815436afd00d392530a168303fc0d72c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZ972343969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb818dcac3a4fd629eb72f7de60e133cda41ed8822dbae6df3faa23ca0a66fd0f. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZZ972479580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd233574db9961570cc9281aa761ad80cd3320b6658c301375c8893ecc93f05. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:50:48Z), 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/HKD012513398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd176137858881b7df3b306541712cff6e3431e4e39501d50777c6b8eb916910. 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/HKD012526045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3eba8b7d1beb539a7b7a23a0938051ebbf723a1b1f485e3006093ea53eedee. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/HKD012529034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdcfdc573b25842efce93b06ea29ac3ac8e0c322c04b5f9914e718cfdf0cd07. 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/QNSM12503944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300f1a0e145f68a54fc3a1043961017e24283e148c5de7de113a12b90583dcea. 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/QNSM12503945.