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 0x316b36c4693f505371ba3110fc59c3f1b1e6e7946aa1c5263f05b71c5c7cd0ef. 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/4998869c-b3df-401e-83a6-ff26c1c12090.json and https://artists.proofprofile.net/proofs/artist/4998869c-b3df-401e-83a6-ff26c1c12090.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 0x9a7a5c7d955172322c801ee01e5a63006c27287271fb272612cc613e279ae511. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DGA052263434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64c8d6b2e75db6bd45c75fc212f87c834b7ac562e0065b1294bb3bcf662316c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:52Z), 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/DGA052263433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca9061503cf3d0ec1451dac3ace804a46627a1fbf71e0180ad5fb7b4a94f6a5. 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/DGA052272204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04475eae0788277a21e55ec9cfbca07f1929158cbbd2ca63ee181547692b2a20. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DGA052264642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e522c637fe54b0cd3225ee28eca8251ef9e0fecb1c24261686b3fefe2e7cae. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:44Z), 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/FR10S2311418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c035648ba09208c45de484657f929b68916302280ba15e7da5ae11b53c20cd. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/FR2X42376542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afce5c76dd0ec131e200c9d7d3f189099eedfc706381087565356278ace2f08. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA0R2332374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec212833273f60bb8e7635757f327cdce6f7c6603621ddbd51a20e75772c0a8c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR96X2441990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644cd6eef365e9924c1d7d4f96f4fb16f5e110694c513528ac8e3c78b5ee9875. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA0R2465068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d1b946086ba6109f33517f84f548453edb7b39114c37447089d65d89f46373. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR10S2551775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b49e065866ba485748a912ccd83668fed3f99cdbd6cf43777fb183a65bdf4d9. 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/FRX202539139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5df1bf16dd9a2710fb2cdfe79a6e2ca4c31f06cee6d76ca20612335d60f1c22. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:37Z), 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/FRX202561815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c6d86e56126fb7c0fe292e1580d2f64feda8475c6be85132328bb053c9b8b9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:42:52Z), 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/FRX202561818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eebb5fdd9684d7810f68a994b00bf64a36e934c281133e716c84b792ea93f64. 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/FRX282520405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6557812f51dd69cf88421a2a942fcc93972006dec4816606e341f21e5e55daba. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:35Z), 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/FRX762567317.