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 0x999598163a467a0a62d199ef2b036daf315ab8ff116265c3e4719c4ac1eb7b9d. 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/cd6653d4-e670-4b5e-ac24-87e789c879d5.json and https://artists.proofprofile.net/proofs/artist/cd6653d4-e670-4b5e-ac24-87e789c879d5.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 0x019b0040a63ed67916f83224c2cfe3db42542c438f470e06aa5fa4917321ce16. 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/CNE041034604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efd4f7ca4eda86bc42f674ad57e8ce7cf1766ef3a5f82e4abfbeb4db15a5695. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/CNE041034606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672341eea4d27133850897eb674df082bf395c9e0d1390e8d2a51f090f549cbb. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/CNE041034608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8725268506e5b47dee70f277937d65535687a3e537fd78c7e058df3dcc4288. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CNE041130303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9f1698fe2a1e65aceba887de095812dd743997a9c30d05b4ade570d1825b20. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CNE041200179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2192b94dade010fb6ec7efabf2840a1b1ca774ba8c1cbc2d1f2b414de54e5eb1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/CNE041600327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb58ee6cb779c87c24c03ea0436dcd075e42ef3b065b742a8c875d2e528b954. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/CNZ631700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe849212dd978403c3e9121e2414569e32d4d70ce2dcb9947f8cea5f0f2fefb11. 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/HKG732270648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76fbfc3134427689e554518c53b3240ecf6ce3e6d053fd338d82cecf37eba70. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/HKD012369080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb149b99ee3282ad9c33162fe2aedc48b81fd790281226732105b617dd83751. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/HKD012369082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2cfb586de2a0897440a3957ebc7dbc4a3e486aea21362e63a22aefee7455ec. 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/HKD012369088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19adaf41f0ae97f6a50dd6031018c35720504d6a5c73c3d45df9b8b381dfbb3e. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/HKD012521394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb83a639c78a039d9b941f80b4cca88f29421eeb7ecaef7e03bbe6d16bf26ee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CNZ632400723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2eba9b6a733f627c4a61a03ae258f87ccc68130db9f187bd728732bdae5eeb. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TWD251850037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2a5a2bce89ac5cd35c09b5505875fcdcc127b6a0053a057cd085249d846147. 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/TWD251950315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ec0777576237f6abfe6f1de0e77a48796f749d0fd2126fe44e84deab1a4e6b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732292592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964971f27cee86ab6501b7a7f8b2875f4edf8ba7002eeea69f3f72d459e4d4c2. 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/HKG732292589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62a0c4a711db50f43abf68d583910ba425dda3fb690c188ac9ae8ca0910b689. 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/HKG732292682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fbccb2bceb55e4d6f53a0f664b600405f281599628821c3435c8c207a0a30c. 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/HKG732292690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4692687694a1887d36783ab1361ba157f4e12f6c7f2a20f1bb9de987f21ffd88. 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/HKG732292684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987d20120a33d1e7dceb2f986c3d6fd52fcae558fa32247d7337e795178aecda. 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/HKG732292691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde038ee136239f053d5e5d9500f2c04808446134a7a187293150edc7c96d03a. 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/HKG732236040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fec286203db8dfa1f6a4e5ee9c849cc22dd92eb909f4b4eea5f46e661be9ec. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CNZ842300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbcd53255a711d18ab91835f6c711fb6e24c8fad2e6b584eacfa0b77b2ae92e. 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/CNZ632301544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c16fddc18df73110386c6acf8f7a1322b234c73da40399bef01caa22816346d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKG732488693.