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 0x729a6fed1a3dbd7ec6dd956e26698ca4f2ff583ae1d6077b89c7d5ca0e108d2b. 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/b8ae6061-2d9d-478e-8ce9-40b38d8142ba.json and https://artists.proofprofile.net/proofs/artist/b8ae6061-2d9d-478e-8ce9-40b38d8142ba.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 0x7a12097291bbb31f59c649c36353f1eeec8666e54c39a220ae18421988c2488a. 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/USWL12000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a565d3636b8cb12499ad75accca7a2638e31e39a36a2a65dbc258a3ec33dda2. 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/QZZ3N2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf9a5df2db167ceb4464ec974930df007a0727995fda80804835c1eed0a83d9. 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/USUM72122243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d89e6e296229767260b5f618d7a1bb45a9b91ddece7da65bc22aaee98d8479. 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/USSD12200989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec81c8715a4884c2754e9414d3f9d9671a826f3d9e97db253ec924cc23377c9. 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/US7VG1990845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748923e993965934693039d16d8b5715a448678343d07e92bc40825b276f9ef7. 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/ES5021901549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99412f49164a4183fbaf30dce9cb87cafcb28e2b3b6951596f04f6928869113. 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/UYB282310601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38c81e21bf5cfafd72e7ccfa37c1eb0c97b8d3096561a885ea04feed85386f4. 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/BK4DA2413628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ee88dcb41014077a589162e2d8724143d08df5c487126cf7ce3a659c04dc84. 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/UYB282410600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab56519cb5b4bbbead14ee983793230d06c8444777aed50c49eda3ba9640e97e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES5701900349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffac0ee3ae96bf2a16b6da8a7fa3ccf7acd606498340a9d219400275b8fcb29c. 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/ES5701900353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab56519cb5b4bbbead14ee983793230d06c8444777aed50c49eda3ba9640e97e. 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/ES5701900349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffac0ee3ae96bf2a16b6da8a7fa3ccf7acd606498340a9d219400275b8fcb29c. 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/ES5701900353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12715cf8e34e4b8489bc558d01dc4af4eb6d4605025497a3bda95962265ed31. 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/COA6W2101093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbff95ac1f27684cb5be445a30a9de06495e007e818b33194145a5903922156e. 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/QZZ3N2400074.