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 0xf293aae45b82e09d0edb0f819ee1743ff7a8a53a02dcfd53d7a4d68d951b1ee7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff2ab1a1-a121-4ddd-9677-158a25172568.json and https://artists.proofprofile.net/proofs/artist/ff2ab1a1-a121-4ddd-9677-158a25172568.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 0xadbfb8511590db9fc36e21642a330e3306de41a4243df61a890c676814401416. 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/ITX4M2100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4000b0fbca128385f28b07eff183a4ac49018e52912898e90e172696c7bdb71. 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/ITX4M2100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9d79a8a5a267fced0d07e68e857ec1f0987938fad2b4c6b27947fd86b8bfe3. 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/ITX4M2100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5ad923378ed28feb4b2b8479f2e5b8b7a2f92be15514309c295f9961d5db31. 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/ITX4M2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218f295a415c4ad495b996b2e8e4babf4776828c34c3aa4a73bebda80e871371. 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/ITX4M2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe687b25bc483a62bfd318bd2edd421c519b4e070e3ed2007694e5eb044ee2d8b. 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/ITX4M2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b6c249f8f962ea1bd19dcc3e0bd2e3b82540b81ed44b816e7613ae37b3c543. 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/ITX4M2100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e730865bac9d2188198c3353d3e7dcc95e40d4347dade9e05ffed4aecf9ac2. 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/ITX4M2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa771e597fa10c5effd4b0b291ec33a914c4afaf8a7ef6f6a8f8f8f2a326e66c9. 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/ITX4M2300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3bb5a4d4d79566306cddd3e49fec0d17e28d14a19b995658a0928f340badcd. 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/ITX4M2300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42de7dd4e1d9206dab9bcb7174ca8b1883272cc293ae39b902fc66fbadc29bec. 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/ITX4M2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf41bf18abb2074f1213c58c3690a9efd22284ee0ab8e1eeaa60dbe13dde89b. 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/ITX4M2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d20f5aad662afddaf3f0bd7907847a707e1c7248e101a525c40cad668353af. 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/ITX4M2200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073da3434134910bcbc6f1ca08de29c3bbf13686defae0f2ec95782a319a86ef. 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/ITX4M2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd445b93881396a0806ddfc1b0ebff6919abf53bc87a41199abcbe51167c9828e. 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/ITX4M2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726d22c833dcc651c3afce510bfe0cadc081707738088f370d6c2a823732c48a. 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/ITX4M2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc892a6bab3f1b534212f5fb34ec2710f8257385f939b4b8f8912f83626d80a24. 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/ITX4M2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7e6d1cd6d0f5eb1bac2321d37538ddb7f122f1f7bef5cfb8f3b9c3ccfa27f6. 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/ITX4M1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810eec0199402a5c61a08ffdb5e08165c4d70a3b90a6c7fd8086bfa6022b2679. 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/ITX4M1800001.