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 0x8d8f34974f2d5e56ba5e0551523ebaf69464851fd84801f26a04c1840452fe22. 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/130d9072-da5a-4530-b150-933c4c46b0e0.json and https://artists.proofprofile.net/proofs/artist/130d9072-da5a-4530-b150-933c4c46b0e0.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 0x3cc5714cc39382a6b297b4813673e02ff32d9af40d7c74b2f976b27f2783e45c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZZ972439373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb484b32fa2fa6acfc9817804b63ae8c4ba1e5f365c922f2bcc3e9d264717d9ba. 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/QZZ972439375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7570aa1119d5ea6f59e9c145fbde40ca44c41c56ea41cb20709f2397201fdf6d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZZ972439379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc264513e450911d0eb49cee8910cb7e6a23b9a2de6d513c59dae32f07ca871ba. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:28Z), 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/QZZ972439380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9546faf1ee75cf8aec7097b1ce2c135559a3087dfc28467e4e8f6bb29364763. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJE62310217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d19ee42602fe23fdd2a6842593c1369931133059a775935cc49bb77682f8006. 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/QZZ972439358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d05840963b479ef5b82ace6dda0d91988f470c6ea5f19878f7d1645a76ccff6. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:03Z), 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/QMFME1328633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3df620e02c3aafac20f66b99b4a1036b277a6ec32044d757ab001158bfb986d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QMFME1328634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bfe31a4305be35679fb61f97df91f5eb3f41abfedd19198581d3be27e1bc78. 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/QMFME1328635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d69488a4695a9f92b8a8cd9160406f8df40dfdea85306b4c999f7e30f2ad8dc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMFME1328637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422e4661d16e0378ab4c3c090cf4ec8578eefb0d4a5606c1574eb04403939dc3. 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/QMFME1328639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23a10a2625bc2a348011bb92bbf524a5244728a5603f928d40d3a8f5099f27a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMFME1328641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203aa2df862afbe5f29f7514940c8a7431ac15f354872accea78a5988bdc11cd. 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/USJ3V1090456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e36e9cf243209d08ae41d7bb505edffa3f2f40332f6c7b934af454ed1cd70fe. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USJ3V1090457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17434c613965a955e3d98386edbec3fc87274a5b3aff4054a7124869aeca065. 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/USJ3V1090458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294c4d8f08475e374fba9df20a59302e92d44dad77774b164d6f7c0dc49cc7ad. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USJ3V1090462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8644f4cc1d5e98171273f598ddc793cabc069a43a17983866d81793e8b62e613. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:31:01Z), 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/USJ3V1090466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e347feeac503e4a3e767b06692d15175e69ac8e5885c30ecaace9f79b47a138. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:52:40Z), 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/USJ3V1090467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36262f90cbe138758d069d4b333f6bbb890425feaa7b04213993d257b3a8103f. 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/USJ3V1090468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3102074f09d80c1af7d00a4a21d26535991005b0d91fc791a842c295efd0d250. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:34Z), 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/USJ3V1090469.