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 0x1485a961a55225811a8513cae45a5caf3506a1a73c40e138b8cad23b4f82597c. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcded126-1949-4f12-ae63-d5e4d02467e8.json and https://artists.proofprofile.net/proofs/artist/bcded126-1949-4f12-ae63-d5e4d02467e8.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 0xa511e3109f5d06b84aec37c62f8ed66deb38278a33bd64a2cff5be81e57da597. 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/DEW250501217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a138e5823be34cf280846c4cb727bff99dc7ab58ae293dc330bac3f8002f52. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEW250801318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b09dee13337f2eb8452f60e4337053e1e878481c7498568693d6503e7e61650. 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/DEW250801319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb304ccd0e3954bcf85ed3778dfa2c6565c4e6f69cc824ab96677815de1b20ac8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEW250601255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8513fcd94b04ce6350b8d8e3ec32c7a35820c09ceeb945adca728484503b04c9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEW250801320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdaa10881130a97b59104b953b75229eee4276b08643bced96c9e11e3ea01ba. 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/DEW250601263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19fa698a3b1ca025776e06dc4486ce1530064016eba4c18d1b68184a30c1419. 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/DEW250601274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a918dcf9603a6c0bb14fe344090a9d07d2062fa36135c9e44094a287840e06. 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/DEW250601282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982332531f02620515a3b89df0318797b1602c1bf8230623f99b5213241dfa29. 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/DEW250801322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e038f2248fc5b2b810add19e372cbc3f692991b4d1e2f4ef202bfb446255b5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEW250701307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54604dfdfcf4d922a8a17a9667a8b31b29f664c81282f13d25dfbd7c91f17a6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEW250701299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7a484e9893c8572d584311f7c5fd267afbe7b85aa57dc6f8dbd33551a1949a. 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/DEW250501213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a30b97681977032186c2f417ed69ebb378cf50d28ab58ba23725f6a9e838db. 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/DEW250501214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde9d901f18e47316828a69f2fa066d5dfe94ac171680f28f755947ddaeb0083. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEW250501215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0d6388c4d8676c02b431647e2eb76b48431414054a71c7b0bd5bb967abc680. 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/DEW250501216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa511e3109f5d06b84aec37c62f8ed66deb38278a33bd64a2cff5be81e57da597. 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/DEW250501217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea85061156da98a6c1a94929254c7cbce981045d75090b1b27a3c373b486c54. 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/DEW250501218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2ddbe6928f706c656ddf8c9120233907678140242c4bd139870a8e5b6fef6a. 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/DEW250501219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5b5b766175f02d2debd0d253d2cbd5299476cf30dc4c4a7da24dfa43074277. 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/DEW250501220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe006dd3bc173f507823d5bce7396006641733e45268ff6aaf1980d6351d19c87. 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/DEW250501221.