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 0xa45281dfd70744dbc33e9fe3b13e28bd628e3b0d48ed9a61013356e61e6cca4c. 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/ff8e17d6-8997-420f-baa0-bee1e71e439c.json and https://artists.proofprofile.net/proofs/artist/ff8e17d6-8997-420f-baa0-bee1e71e439c.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 0x480e54534df17e353b3cdff34924c16cc64c5eb2fabe0aea92c2ad2c0689ef1f. 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/US3DF2239662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3038bca195b6a39a5dac14db5f6a4e69228352bace6a65b3238333e619e8adeb. 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/US3DF2239663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e6b1b901c372ec016150204b3d46823887c96bfeb52b3f714126872af52d69. 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/US3DF2239664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c6d04c841321c69e40221d2d24c809d0689c616709e5c439a98c229b360b82. 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/US3DF2239665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80965fd06599bcf02567e6df5dedeffc3c559703e62cbb864c5d6feb272d7c9. 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/US3DF2239666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22c3e16bfadb39afb2d983e7687f06950f122f5242d59dc9225598ea2060586. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/US3DF2239668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc580cf02a028aa9158212238b77ee3efe958a2fa2dccab3b3ec705fb2e2e1d3a. 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/US3DF2239670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83cad17ac645c1088416c4f6787384b2bfaca89a35e1180f743f03a2b7dc3d5. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US3DF2239671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339edb8c32e2d0bf0134ff82ffbbdc6826a53496d9f125a817ca8b5dad47cf27. 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/US3DF2239673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abb63640a560dda478d90c991e209b9b05ee4264835db790c87481c5beca7a4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US3DF2239677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0e495bf4fcecd2d50e58c102c968afebc3fb5a6bb90ca43e1995acd203f308. 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/US3DF2238786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aee2164152f707b0b54a061f28990a64153b842556d0a30d4c72f24bdbfee1. 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/US3DF2238787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b30c70693d54595b3ca848ec6ccfe5f8272aa9b1d97e95db75ed9a7a4127b15. 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/US3DF2238788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d1e7a66548fdb32084156f72629d7a2cf27738581140463f41fd3da2d29ab9. 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/US3DF2238789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d119ba40dec588fbd841c5294898c9037b4b92aa8084103316eafeed62a550. 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/US3DF2238790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6baf9108505c741a0915cd76b7b9aca7c660829178b2486ad3ad658d371143. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/US3DF2238791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fec974aaef67b1352a93737df330a3ce32b3a473acf671936b48eee679684c. 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/US3DF2238792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eceb33287f32cbf8b98c08eb30f5368c123ff65a887f96e16cf536e1141a02. 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/US3DF2238793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb18187c3b431d7433ce0caa0fc8aacfe9af43e7cb7ab309486a456b4a88dedd. 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/US3DF2238794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2d533e48b0b9218ea4f398f3ef71f0cc720057fcf0e3331c9370ee6840b9a5. 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/US3DF2238795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0ef3d5679d98c027a3c211b82bfac4f22ef9106b8b29212f40c63d7c7704df. 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/CAFEC1700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a963f3ea6030553a947323773ddf84e85fa77f3cdc7967f52404fe272258eb6. 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/CAFEC1700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f88ad216a9f70a5abbf494aa2285b38d975ab6352ed24b16f99ada469c2d6e. 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/CAFEC1700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc905669fa82daa9fdf48d050919dc9664d46f473c673fc4c118d64d9fc214733. 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/CAFEC1700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98c75fd3838c2637823b86a55257f2a69941a6ef14a138c3ff85ca369788ab5. 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/CAFEC1700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905b08e7269f9a36babfe9608c30613a3fcfd7ef294948d859e75be154a60aef. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAFEC1700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5909426f93fe1a4cfaa458086d7a8dd753e476a361eb61268e72e93341a1daa. 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/CAFEC1700063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d4d12be06782f07d7b385e6382a3290f3d13b333cea3a6a1f70fc0504cfb83. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAFEC1700064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d53203f16f2222ff41f7206c02fded874d7bfc7f7c7e3f368fe3ec3bb743b6c. 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/CAFEC1700065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4cd975a4869ce1f30345e6d1a46ad65d36fee0eb2b8e78e677e5b40f06b43a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CAFEC1700066.