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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb68c9f826592d1e7fbd1a244000748f3cab609b04e90553e2770eb377ef889. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f0de614-7170-4c46-a45c-b9a4177e3d28.json and https://artists.proofprofile.net/proofs/artist/6f0de614-7170-4c46-a45c-b9a4177e3d28.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d02ab335928acff7725f264ab30d320a2654d0ff6421037e5476339e7175f0e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KSA012154523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e68ad965bf4d8c73916ba83e0b783b134980850b8cffaa3eb9e3214060959d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KSA012154524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac21189584c503fcc00d8a2ad1bdaa26a2656e36d5879ab33567f861b081cc5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYY2466534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668161eb0f0bb85044b36ff4680752d120e51fede1cea645c9f3559d902f01f0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYY2466535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4967213eeadc56623cf953d26b254a6e8e7611705157e5e4641b7e0dc77b36. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CNZ632200428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba18caf3100281d8fa8965a9a9b8ccd198d051a6db60cf590db604a20d89eece. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKG732225492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993a66e6f8b12f568930c84d691199aae1210b7d74abd0dc54761578e1d3cc1c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732225579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d7fcc505c3b847a9bb5d6b219b44e32f066da2a67231310d1e369df4717f00. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HKG732225580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77f6477ca0dbf7ac9a1f01af9b3027545bff1f29e365e3866374f445b2adc09. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG732225581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5ac9efc0e32c489ca4a24c0c1572d28aff8243758bf2d256004a3c48484480. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKJ962009858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad15c4eba4f4b49ec21ffe9fe17c4772bc823f9c0cc188054d1ec0675fa6b29. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKJ962009859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffb6fbeb27628d53710957d172c79793ee20991861655a93eb0d6848f931a60. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKJ962009860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce1bd28b8361d08308a38d1a5cd432a14aa9212d40c65b46c2d171f0e71b2d2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/HKJ962009861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233fc276cbdf38cf616f5d2d096f4422a3d5d0bc302645dee4e167cb6fc799ef. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/KSA012165258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104786b9c3ad84ba6807cd6ae10d25ab2ac3b81dc347cd05d6fdf01a22e3526e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KSA012165259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25836005e79fa8a720d58fd825f4bd3925770e1aa1008a8e30777cbf6eedceb4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KSA012165260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86aefb2a30e0f4b97fc897070384c1f4931462d8e470f2ac4b2b56baa2add209. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KSA012165261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a902dab44152bebadd5d82aea831b4fcfff799fceddc83a1b3ff93da3222a0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/KSA012165262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892daf6a6b5185190038014b9978cbba7fe8194ef648bf670e59e66252c108e6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KSA012165263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c85ef75e900f148d611d40607acd3f40bff57ee51d5288839e7449e4130307. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKD012203401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18143555afc53069fdd8fa7815bb43beb82a9894038efd71bf17330778e1ca7d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI322111720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d35c7d49b9b54d889e41ad938685f896616721a52eb8610a62242aabcf36e6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI322115687.