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 0x7bda5907655e261553774b017e13c3f4dc7430b371800316540fe1f017b56df3. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51b089f7-6823-428d-b2a1-4acfb6bd6922.json and https://artists.proofprofile.net/proofs/artist/51b089f7-6823-428d-b2a1-4acfb6bd6922.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 0x7a8a1b8b0cd3e3ec7237a7cdda022740a79248c3fbc8b5b8dedfe39167eb1072. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ART340900655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b1c3d0d550ac4e14100a2d6f1b8590926391e7151bbd006ad2df406e1b15e9. 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/ART340900656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0eafde5624e3b18da70fc76e8df7f46ba63c69dda3e64bfa377e7456b6a2483. 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/ART340900657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653b5ca29aa27342be23d6894e7006e036303ad72eaa387e7f8baec3294ff26e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ART340900658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576141fff9cfeb989ab5adbb66777e35515dff310d10aee6b8c819f257fb7f33. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ART340900659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a608ff8fdd4a56c473d3fe1fffc2ec87a188678df6888dc5ac5f77b2f8cee6b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ART340900660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35261fa093b0c8ba03803769d5c7e1330a4197dacaa10fc5035bff749a6ba66. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ART340900661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291e581cb494b0465c86a8a09193febaeea717aa03e15cc909c6b12db6f435a0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ART340900663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920052630b0e8fe32a4df22db7853efd1d065403f80d88ce5c7d216b05e01e83. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ART340900664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4174cdf4da8403a2f3f97e8f4ac3b0e7627232bc7fab913ed9dc1a07a8cb1852. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ART340900665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c724d2bd7047aa17f5036ed4fdd040d28cad4136b049c8c2160caa9e5ac9ec. 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/ART340900666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dd6e3749e4cb67ec43f95e9983878167004b3ea2f8cea6ae2e94cea737e1cd. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ART340900667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3f5c6a2d42a5fb771bee7d4e3a832e53724b8c7622cf8a5874846c0c3047e3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ART340900668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd045783ea2804754128f064ec0705839c2fe72d240cc5318a35c1934491ee0f2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ART340900669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682b64c337fee6b320746f62c52299e2a05850e1dfe081a61f8f216af6a725b8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ART340900670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0caf8e62a63b100097fa16cb355c4ed79fccf7b7c7c25a9349d226e4e1675ee. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ART340900671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3008d0dfaebc5b8cb9650293d06da7cd08bd0afb057f34d4ae6c782586b3f7a. 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/ART340900672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3664836caa35105e7d8da91451a39475bc33807d95ab87d944bb9abaf8d58e8. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ART340900674.