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 0xafb29ee8b05ec91b28cc533cb76de5d938f30a3b59daf7924c4c6cbdaac6982a. 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/a3957ea1-446e-42f8-a07a-6095eae1c24a.json and https://artists.proofprofile.net/proofs/artist/a3957ea1-446e-42f8-a07a-6095eae1c24a.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 0x7ae64750ab52b606a7e006642e11c3d9a8dce886850870e4fcda7d12a3bbf33e. 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/QZDA61862691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f35de4bc64b4602ed90af62d33ef435505fc62f3f3b26b3a58e9f6cda208030. 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/QZDA61862692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaff02e331e807bd7ff313805acb261bb141779576d016129c738e15b94ef774. 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/QZDA61862693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b792d26578e286cc8d4083a0dfb925575518fa6b8ccf4ecc20d593eab0dcda5. 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/QZDA61862695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9760ab152a36cfb59f8822edcf0f1d7bd014f7bd034b9d0e829efb2fe9e4db9. 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/QZDA61862696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6bd1aa5bcb7596267aa4fd5898d3b8d04229878389bc88c0a33736a4fa6bdc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA61862697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7703d25a1ccd78e4a0055e5067a837043d06ed6c34163bc5ed9104793530c80c. 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/QZDA61862698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe387ea6289eca6f11047b991c6ab50e3acb510c9304827deed7a4693427ac865. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZDA61862690.
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 0xf73ab64aa391d60ae8634787e20c89574ea805a0826d614f15cc1fe9298f40f3. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZDA61862694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f75a1ef34aae8799bc198a10ea8dc1b6b53296af69911603adfae8a5355c65. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADX1804216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd693858ec7f2a6f951d689fdc8abee5544716a3dd911dfbeac0c56f2a0ac7898. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAEF1995660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8737e0e5b9960af2769830023a759ba894e6f364e426b29f6636625c4f07cae. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAEL1960704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfd19f9a0f4a4b5c0be1719995eeee9d11f026846c9230ec6775f7028ba3034. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/AUMGB2000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfe45281e1586e84f71d18b88cc48c0d9291fd5fba84446c41d7b9bd221a219. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUMGB2000378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43afa531604f2ad0939e2e56f963920105f86322cb77121a713c74120104e4a1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:34:11Z), 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/TCAGE2234598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d74de10fedac36dd084d386ee36f89bd290d902f77158b868743d3c326d9c1a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:24Z), 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/TCAGC2296470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b4b0734b841ad61a947a3c402393db2ba87f4c5d39a1cabeea35d655f6f1fe. 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/TCABW1475133.