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 0xb9a58d41e54605cc42b696a9b87ccd934ac44971702095db47af687093e1d5a5. 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/caf1f09a-21c1-4ed4-b866-98209a5c0b56.json and https://artists.proofprofile.net/proofs/artist/caf1f09a-21c1-4ed4-b866-98209a5c0b56.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 0x79100cc8900d2b6c13feb07707c167f80eb2b839e540c30bf8ec50a223983787. 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/DEZC62206925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e831584a6c64fc95f04a864d981fb894e6567aa4864799f64b278035c8e5068. 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/DEZC62206926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c516a8a9126391b8b05cdbb4eb64e6ce3a3237a0fdf82123cc17c09f84d647f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEZC62206929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07d2af5962c3126b9f6b8faa25197dcedb3fbf04b026d730bfffead80e53538. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEZC62206932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6ae86e5eae3472e2e6c374d0328f1aff166f77ecf380f55471691783efb52e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:50:38Z), 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/DEZJ92211100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993d77e0c032116a9af6a6da4ae00831b9800eea6afe8e65192aee9844507452. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DEZJ92211101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb5a7cd6e361c867aba91e6949752f5d91e8b04afdbf10e60e719566c7588c9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEZJ92211104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6ae86e5eae3472e2e6c374d0328f1aff166f77ecf380f55471691783efb52e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEZJ92211100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110887af992276dc1df2e4ae7c6f67b870b12be138f8fc1a513d065f5fe6a3a4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEZJ92211102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe288427242e83270fdf03e2f2a6932b958e3b88fd632a87a3c8d6966a5aa368d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:44:12Z), 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/DEZJ92211103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb5a7cd6e361c867aba91e6949752f5d91e8b04afdbf10e60e719566c7588c9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEZJ92211104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4138f2c7affcdf70b9c6115f516643751863030d429121b3d559c6a31222226f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEZJ92211105.