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 0xd4d356e832867ee9936f9641a4a1e36cc25f8b065a5445e2dbc0ce155e3536e9. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9ce6f16-cd8e-445c-8f6a-ede09dc951dc.json and https://artists.proofprofile.net/proofs/artist/d9ce6f16-cd8e-445c-8f6a-ede09dc951dc.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 0xb060c3c7a3a22b7779d5814cba6829d46c07cc6b32f2eb7e724740c90ae0edd1. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/DEZC62387490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2d5a46941fce018c2626c19d7b12a3d20e7a92ba5bedbb317c5f6554c753ba. 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/DEZC62387491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80efd47c8eeacbcdb83d63d7aa0314d25ef07023f716728c6830b1be301a53c. 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/DEZC62387493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5fd6084ac896367981d0c95d81de42b97811beecf3ffaa10723e69ff5ff4a4. 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/DEZC62387494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f75752635dbd67487b00dc7c7769edabae95c55d201a6ec8068c653e50abac5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEZC62387495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49548216c6ec978e8c5e4b0eef3b7fb28a3634a3d0affd01cdf31af7a9b3a9d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEZC62387496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f84d9b3f4925ff1e68c0b2545a1252ff6dcd158f51580ab721cb3fcb8583b5. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEZC62387497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18749472729a0d0d6bf1592aab1ce8e321014ffa2453a35d235425047cd37ca. 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/DEZC62387498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8384a5b64bb4ab46575e0183e9b2c3820c86846e1c047828b055f8816899bf. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEZC62387500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b82aa4267c776e75d6d1eb27e607f6ebc94fd08c09e51e8ae485ba392a5292. 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/DEZC62387502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e366acc6c0a9cd25b8aad4a1b852f37fdbe4ea9ed2811466bc0ddcf9dba5fef. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEZC62387504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05303d2af083b47a648e11a50e6b1b387d29215197df4a8791b5021b6561d67. 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/DEZC62387507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b603524c7defcaa8056435961d6ea0028c69883a8d6680fc605abe1b5105d92. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEZC62387508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e92b20f6a09222f56b99014baef9b7dda6238720dd5c514f14223b24223d08. 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/DEZC62387509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b02db0e3e46775902a13d9b0a7168c4380f7a301bc1cf112017a765988f53b6. 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/DEZC62387511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ccaf558bdaeac7c3242f642dbc6c3487c75b4999097ca9eb57055c2ce9d611. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEZC62387512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4d666c45d8bd8dabde515a6b37c3193a2ae3e333579bf2d08e57199d403f43. 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/DEZC62387513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47424deb38e887c917f4eede4911d104dae041c94a09140ae4e44d852b459c6d. 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/DEZC62387514.