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 0x611449221fb8a2eea65f65b8268df8dcc3f95bb2ce66002831f906473bdc5d58. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19161538-6958-4998-9ce9-02e7b471cc23.json and https://artists.proofprofile.net/proofs/artist/19161538-6958-4998-9ce9-02e7b471cc23.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 0x93301f74928680a99d5be29a7c8a3b1630d704202d6bc420eb28b182aee88d2a. 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/BXINV1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc7ec79088dc46e9737b0fce26dbd9e128de6fa86370762cee9a74373916ae8. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/BXINV1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b8f1a116b67471ee8344603d868983eb9e07116266db4feffb7b9f9159ec08. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:42:46Z), 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/BXINV1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776abf2ce9af7994382d66fe84578ad8151f6c64ec8bbdae44f3dade5a548405. 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/BRY152100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28d03c7fa6ededdcf6b3a2155cefd5234429a1e02cc9e21e513e08a3c388a57. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BC52Q2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a8480c406640624af96934dbba4393e5f18a05295db5a51e4e8bb9ffdd4f85. 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/BC52Q2200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f91f00dea0c4f86d208f81685b16154c6ee137cc1c40403733c5d39a0e1fce. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/BC52Q2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4227344dc3077d47bba1bb2d6ba185a03f586af3a63fc3d66ea7d8adc07746f6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BC52Q2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1957274cb3b7c4ce290b4b66db046ef261451dc631cc6f6a7ca5a9723f597a2. 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/QZW9K2372418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1957274cb3b7c4ce290b4b66db046ef261451dc631cc6f6a7ca5a9723f597a2. 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/QZW9K2372418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9632a0ad109b3f771ca97a2ef5ad9002a7d18122585472867955c39f0a4c5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKMLV2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9632a0ad109b3f771ca97a2ef5ad9002a7d18122585472867955c39f0a4c5. 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/BKMLV2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3fd9c4f6946c268b831ffb3651a961b4599d8b9014d5abc291bb754a7d81e. 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/BC52Q2200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9632a0ad109b3f771ca97a2ef5ad9002a7d18122585472867955c39f0a4c5. 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/BKMLV2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bb277d23fa2d0d92b224c54ec7ae9cc4c8e1c5180493fc6dc07b8d66692a41. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BXNHS2200024.
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 0xe94c08fee7b4e2a9d519acd2ee811344aee27106b5974d4a28cad6edccc2ec83. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BRSIC2300037.