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 0xcf69d1fe2c93dda7b528e097134fed5254f3e5e82cfa22198f345116a30035a7. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a3e5c77-33bb-4853-8df5-a2dff46c00ef.json and https://artists.proofprofile.net/proofs/artist/1a3e5c77-33bb-4853-8df5-a2dff46c00ef.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 0x6990cb972fe7407adaa2bf3769fb0b1d1da93e373b9ec5517b1517327db6a272. 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/QM4TX2260562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f7ffe47734f4a9535f4de8dabfb8e2014e3b9cfc4c3a846bb518ada9f8f7c5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM4TX2260573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adeb1d267e58561cfcdb08296ebc9aa4ad7a5b268bf0370a1498623c64eb507. 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/QM4TX2260944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115739e6046f4c6ecbf551e9833c11de6bb38c888a31ea2aea48c7ee52622c5c. 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/QM4TX2260570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fb982beee35e77a2a0fbb70e62fa29ea5946e756e4ff8eb8ac1fe3d935a820. 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/QM4TX2260968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9445a9ca7a373f46f1e400e92dd2209b327d3eaec359e27159054fc015440a76. 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/FRS182161792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74607f71e84eb745baa6b72945d05a7e1ce5c64baec204235b6e45dd754a8cf8. 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/TCAFE2082954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2286776a63a9e0f5544b6a654efab10511303ec60f87c7c7fd34f7de3b93b74b. 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/TCAFG2049839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6083803374a99eeda4c71865f37d92ca2a45c256bd0d7804970f2fc1f2d4d8b5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFG2049857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f182b1d7074b0dd96394708772a3bf71f011979c2b38068d6691139c52e881b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAFG2049871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35adf45608840c2e609854a1851529f5ad8a5e9dc407b3a8312558d6f5c5ccbe. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAFG2049881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8af9d92183760a1cfa9a80a451e1412b909ac235ea4632a9d999b38841ba6b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAFG2049885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbe516e58b9b6994ecd939306e568b209386569c1a470cba1497a7886de86aa. 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/TCAFG2049899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6281a3ada155f155aa99c398c62ae56dd0594ddb8d3aa7a81ad80140484b8e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAFG2049903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca6de17262e4288f8cea21f6d0efe2e07e83eda56f830e4f57373804b223a87. 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/TCAFG2049911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f0906185c55382ba8630fd5aaf40112acbb66a951cc3ed8fd287e53338f283. 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/TCAFG2049918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9445a9ca7a373f46f1e400e92dd2209b327d3eaec359e27159054fc015440a76. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRS182161792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74607f71e84eb745baa6b72945d05a7e1ce5c64baec204235b6e45dd754a8cf8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFE2082954.