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 0x7406be17361ce8767e3058dc5a6daae39d1fd21f1ecd80b6e7ce8cca95ed635c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59e44d63-ec43-4e61-980a-b2b6fb7ceaef.json and https://artists.proofprofile.net/proofs/artist/59e44d63-ec43-4e61-980a-b2b6fb7ceaef.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 0x12bc0ecbfd616b0cabe3f04b12eeb818ec3e0839cadac0b0cafdfb7b0b2e1848. 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/QZFZ62413693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecb796a2a64f8ace957c55dcb7ecdb53f8aae678e8f57e5f062a20b631f7ffc. 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/QZFZ62413694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c14516500132143843fa38946bfcee589fe1e6728a304238c9e97dd59312db. 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/QZFZ62413695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0559bd78369b97d88cd6da4d5393f04a045d0a9800b481449017ecb607f17f12. 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/QZFZ62413696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf316934c77e78356af3f41594659a2be586c8e6fece48bc75245b6094463bdd5. 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/QZFZ62413697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49923c6668cf308c265ad6ee167571f7557f8375df199f0a5c3abf56a97ede2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ62413698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce57763e88329531cca862c0ba3f41831ff8f5b406826889ccb5c35c4475b7b2. 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/QZFZ62413699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfd2d33fe1246382f60e199face33d8ed60c2d946790123ad0d856826388ea2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZFZ62413700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2935aa26018e9300f0b0eb0195e39ea1e25eff0d2c491b670b171f0cb5dbdf. 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/QZFZ62413701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c439d14ad9234d8d188f2d6b1e8765f9420537bb6dd9645e9e33f7da3f9ea60. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZFZ62413702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c0b4fe3a1f87e1be49cb1df0fa41960d78df8488412386232838a271b93ea2. 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/QZFZ62413703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7decab38f332bf8cb10daeaaed8ae93d377baa32fad1e5111c3b3fded050a71. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZMER2111706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089ae01cad7419269c60465f8cd078c28ad0cf18ab564039c0fedfaeb51a655e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZHNB2189897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7cc6de28336a3197cb4d433c5f4f46879327afe5418170b8a16c5b85176b5c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZMER2111707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fe5cf05b5b57878a946667c5baf1c53e8591a6b6eb621798f634cf4e78184f. 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/QZK6F2109870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bafe95733e3ec59f2533d4cf3104dc1d1749a37ec19c39f80f2ff0b3df2f8bf. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZMER2111708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf234434e8d656c87e39c7dadfc2d47a42821ba66e2a547d35613b750b6218114. 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/QZHN32158876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8507ab426615f0e6a74a174a7e5c4aec23cd23544382421acba46d45f520306d. 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/QZMER2111709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49923c6668cf308c265ad6ee167571f7557f8375df199f0a5c3abf56a97ede2. 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/QZFZ62413698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecb796a2a64f8ace957c55dcb7ecdb53f8aae678e8f57e5f062a20b631f7ffc. 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/QZFZ62413694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e004a01b31e060f3c144d678eee72b45b2aef39b6b80b0f4a8846e420d8dfa. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTAS2385496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a12914379ba12162a4bc8334fb4461a8dfea5d8c54dcf4278c35e0ad5c008d. 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/QZTAS2385495.