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 0xea1e5a68b61519c160378abff27b993e15e69ba6758b07e3d5e8befe7fabd0cd. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b47f5a5-0915-4d5e-a1ff-20c4ef86c888.json and https://artists.proofprofile.net/proofs/artist/1b47f5a5-0915-4d5e-a1ff-20c4ef86c888.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 0x835b0e71db02eca18f050e149ece170f10d75d2a981b5e3a91628415499be9c3. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/BX62P2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835b0e71db02eca18f050e149ece170f10d75d2a981b5e3a91628415499be9c3. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:02:18Z), 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/BX62P2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6251f96241facc8dd1f24dfdcd74834e8bc8d5b48356a410c367cafc5b41c72. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BX62P2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e306590127946576ce7e0785a35f81ecade9dd718466ce8c5dbc3753b91399b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BX62P2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe071ffc5f7f0d69fbcc5618cdeb6633821ae923a24bf63d75880074b85efbfa2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BX62P2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f9fdee3a5db27c5fed86f3d0e00e24e6798342891b5beb07aeec4d3245b2ab. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BX62P2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3896e87c2a19cc85411836518c222e51e1df3eea96568192864570ab190cc96. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BX62P2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e05585d229d7d6e15435fff4e782ed3fcf2be50a3aaeeee442cce77bfde783. 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/BX15S2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e05585d229d7d6e15435fff4e782ed3fcf2be50a3aaeeee442cce77bfde783. 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/BX15S2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d90cafadc2050fbec15d0ac6104fd9a65877fb462848e0800241e1de4f62de7. 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/BX4RK2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4239d283aa71aa860a9067e3fd295cfea86330827ccdf57f32bd1c5bfa0dd5a. 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/BX4RK2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517af3888326f36e76af879d6b49b28e816ca2387885ff66494c1631553a32ce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BX4RK2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadc79463a50fc0ba1e5f797309700896a09a253740df49b4a4cd23753fb7228. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BX4RK2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9655eff4a2f0fb07e07c7195d1a5858d2f15c3eb593cc94a25e19d59b0b2329c. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/BX4RK2300004.
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 0x1842a1dc1ef77610dc0e555c88bcba79634e7d9565f9a84dd2bfa23ec33f625a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BX4RK2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d2598ef460044954d3e542fb941faf386073d32680c4f6a76026aec0bf4efe. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BX4RK2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b15d1778445d21534512fb3300807293e0da1531f877485e27a44f6256ccbd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BX4RK2300003.