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 0x084146f76dfcdcfdb9803a313de5f390acb28a4a0aa43e59bf824381964d04cb. 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/d6b149b5-6e22-4dac-a118-c819160737f1.json and https://artists.proofprofile.net/proofs/artist/d6b149b5-6e22-4dac-a118-c819160737f1.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 0x27342ee4d99e594ada440a867dc6e8e27252261f721ab748130ef6d2ae2ac0db. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRX201802540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dfb384e8634ba56cc1d2a9fb8ca9472cd8e75ca86513b5d93589ff086f0520. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:08:29Z), 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/USA2P2226318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390f7c77fdcad6618300d3e53e52b9cda5ea1890d694942182d8707522c9e31. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USA2P2261059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d84ab009875c8be1143a770d1f88b7cc240a4a19f0943447dd8346333e165a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USA2P2325394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90cf326580d17ff3fd9c65e2422f56b1671654878c73adc125e17802353aa7b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA2P2334241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffa57226ac227f5eb03b8261ff50100a8cba454dcc168d040171fbd11642282. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLI366878321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a19eff4cf9f509efded1889b5a0a0763b76ea52cdb5aec225c694d767295fa2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLI362842050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89668c85bca45f9f61e0e382f042ef579847a49cb678f499a2bf6c04b2a2d975. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLI362842080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b8470a3c61cb26bb290f5ec1bb1bb7aa1e137d5c0d510361edffdc97aed589. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLI368900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe465b3f27ebbbb13450a75f616cbdc3133a37f9afc054454c0d49489048dfd4b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLI362842110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffa57226ac227f5eb03b8261ff50100a8cba454dcc168d040171fbd11642282. 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/PLI366878321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a19eff4cf9f509efded1889b5a0a0763b76ea52cdb5aec225c694d767295fa2. 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/PLI362842050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918629fe3ad00946d73ea75e9133d9048b7eca856071f3133dcd47617e15f4cb. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/PLI368658370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424348dca96350157630cb6c4c8912577967741251ee7a0ebe537a3c94de5959. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:58:58Z), 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/TCAGB2216178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796b4439c122f35fcf00e9fce5f1206837cc897d7f59fee58af164c8c8c257dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLA552401141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86475830e66e0323444edf7bc18a1d21edbebe16fb0dbc3f5ad1b3874ed86475. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZES92143092.
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 0x2b3fb55759fcfa187526227809556d0354a7c90a8a246b27f5ab87d62c838d9f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/PLI367654330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4a05db7c920ff34f351ac1a0b4acf5242355c404f6c4ee6826bfa63894a1ec. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PLI367653480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ae19330984b6bdbf4ec37c7a1d4d7d9ee190d2cb787822b9964267eff73bed. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/PLI366983700.