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 0x6314145c2824abde079732fecc9735bd569dd2b262aa39b3dfd539078b6ac6fa. 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/ba313c88-7034-4b4f-9c39-5289fa4b8360.json and https://artists.proofprofile.net/proofs/artist/ba313c88-7034-4b4f-9c39-5289fa4b8360.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 0x900422ea0c6ea9149451f5d26b0376b9ed287cef272cc3f8df30fcfa371bd330. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/PLC691600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c894d9375ac45b2185527d571a3ceef05d705d27b878914045ed4231f80dbd2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLC691800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7aa4f843cc9064de6a76b1afec750b78f73159619663b3690af36f32f868d3. 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/PLC691600240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd117f8108ee9f4a530621e65dfdccba6c7cc3b17bb24ac173c9458641db8b10. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLC691600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b16803060f5ed7e2a0701720210a89550f727567155f1e66dc1ca37daaeb55. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:59:25Z), 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/PLC691800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c894d9375ac45b2185527d571a3ceef05d705d27b878914045ed4231f80dbd2. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/PLC691800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8468c48e3fe2492e07be351bc0a5e56f7ad8935d96d887d07d4bb3393c149f19. 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/PLC691600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a89e138def814d2e1b486b7c49b19a8c3d977b473f5638f3db90906c79babb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLC691400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a4677e6a3a6dd8d27cc251231ff7571582664270fa0d3fee2457bd43745310. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/PLC691900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8315949d17fab98558719d0e9fa51febb7e978ee8704f00bb55a0ec933e3edcb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:51Z), 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/PLC692200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8622c41bd67b13ecef606dea176da278325fe6d5c63eebd274d00f1b1162474f. 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/QZDA72394860.