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 0x2255621865ac40e7b98d0a10e692dffcc656c29c631121a13d32d55ead6e2fbb. 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/d6f1f859-5b70-4458-8c3b-ccfde4cae1a8.json and https://artists.proofprofile.net/proofs/artist/d6f1f859-5b70-4458-8c3b-ccfde4cae1a8.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 0x5edde6b809ad7dfeddc7c61facc886e00481edb033a0e1aa56ce2f6ac8eb3d39. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH7812226768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7e148b94972f049c39cc79862a6c98f5da972df352833975269329c9399c40. 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/CH7812232971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e78e4dd62270e0c9bd9c866ffa11f57d920aa412e57c8f4163e224f12f7458e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CH7812235992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa604a287d40d5a1def18ebf580605baf24feb65eaaeefe563dd2151a6496f65d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:10Z), 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/CH7812235993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2678cc93f8b3428cf63fcfa8273d8dec39e5dc5c0028ec76a3c457ff988e656. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CH7812342825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a84e3d38b33eb0a8cb63e37277c50100583be569cb9cd6da35f175ada1639f8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DECE72302212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb023a61e83a2178c687d36611992a75aeea4450031225d257dc9a2ee0214b091. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DECE72301531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fdaeffe402033231252c8677132e66ec9fbd20bb351821db59de190b759139. 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/USZXT2352760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe049df211bd2de9450806a6a9b52accdfedcba3e92f1443e72e46a77acb52fd4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DECE72303518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58685da072f7eb3588954c70b58d9de16f3c8b6fba589b21aa54f9a4936d2941. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DECE72303116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18421af9064b6ad955057f75f1677b26d98f7b71913e13753adae5ad7a6ee89a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DECE72400661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f7b69192b184b81bcf7120534b122fce9b4c147aea3962e44dedb6635d0449. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DECE72400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8779c1b3192c56f0d28ba91d130b6d7617e566998d69091b4e664414683aeb8d. 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/DECE72401036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f0b360022a5caa92dff7d7b2166487cb9e4447b1260e39d395f133cfdb67aa. 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/DECE72401032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176c22fbd9d9e3da8b36e30913e2cc95598abab77e4cbd292b5d1f7c5adc1e77. 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/DECE72401033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e373bf4fb9ff94caf9b5510f9bc7f9b8e6dac05b30909b416277d4bd562fe9. 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/DECE72400642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18421af9064b6ad955057f75f1677b26d98f7b71913e13753adae5ad7a6ee89a. 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/DECE72400661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf624515e2300174674dfb6826560ba5f845536566e112c02c93404c1694eed00. 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/DECE72401034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456cec502b8f908e9f00d0d3f773afa78086a33080832d5b8da6eb12f765832e. 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/DECE72401035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58685da072f7eb3588954c70b58d9de16f3c8b6fba589b21aa54f9a4936d2941. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72303116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe049df211bd2de9450806a6a9b52accdfedcba3e92f1443e72e46a77acb52fd4. 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/DECE72303518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309fadd97a87ce4c8820d79b0a3bfcadbfab4ac4f728e4d9393a7ac995cf3881. 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/DECE72401041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f7b69192b184b81bcf7120534b122fce9b4c147aea3962e44dedb6635d0449. 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/DECE72400852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee485c575520e4fd4a5d193fa614d96723321d3454026086083b78cc3000227f. 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/DECE72401037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59810c09ae4ff584755119f3559020ae7d2906d94d8ffc5f1f9ed779655c2c5e. 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/DECE72401040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06ddbdc4ac2dcbf3d52baa88364086170bb3a2e089beea2be786e6678d9905f. 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/DECE72401038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c48374678c752339e04b6d4ce2cd9ea7a67dd549a45ce26528f578f11662f5c. 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/DECE72401039.