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 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 0x5d2478bec0e71aeda0521a7332a264cd06a948810e3d7c4dfbeaa9c2ebc7aa85. 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/83b94446-0b29-4763-8ef4-c21cacda0d77.json and https://artists.proofprofile.net/proofs/artist/83b94446-0b29-4763-8ef4-c21cacda0d77.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 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 0x1bfdb1932ca64b059f83fcb8b9ea0691725eaf9d4aaf19f857f8d2dea6d03cc0. 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/BKM2L2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089eb6cfa2dac0fdb75de11ac30830cf864be5f70897e821d5149ef159a01100. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKM2L2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850055955531532eac655fd319fe85196efa778bde635b8f7aca316fa3de9207. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL8RL2459792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa14a67857889ab048329534e2b23c22de4dec2bb13e2c2c632f3100e8e42d99. 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/BKNDN2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429af16f0cabb073b1c489cfe4289f3875a5e209f44e515761ea86dd7af42817. 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/BKEZ92400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fe0f840fed6d341a9cea7f9a3f66dd4126441f15d6b420e5cba9f0719626e9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCM9A2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dab35c5a142e5bca9822b5a1d4b6ef4febcabad16cf8be363ba1adaf1cf96ec. 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/BCM9A2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5cd33e995ba7ed46b35814ae48785f53aefd328d7bb0427dd1a6661998025c. 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/BKM2L2400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089eb6cfa2dac0fdb75de11ac30830cf864be5f70897e821d5149ef159a01100. 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/BKM2L2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279e9b6576e9a21f53b01d2791c870b98e64e1de925f3981c05f5616cd1a83d0. 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/BX5UA2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd18c98303f09aa30878c053c890d9cce34342d75d820e41d050877fd0fd751. 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/BXQZW2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8ab57c139c043b311600529a6cbd2b7db21490d2dba3c9043b810d252971ee. 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/BXQZW2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429af16f0cabb073b1c489cfe4289f3875a5e209f44e515761ea86dd7af42817. 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/BKEZ92400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5cd33e995ba7ed46b35814ae48785f53aefd328d7bb0427dd1a6661998025c. 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/BKM2L2400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aa4025cb5650d789d501033f15a167fecff1eaed07037b6e118b811daae83f. 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/BCM9A2300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36089e1506e9bcea45999d087b8b0e11fc43d36ee5d9c7c785074a5be5ee37c3. 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/BCM9A2300079.