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 0xda1d7ddf5f8270fb07a5880a3be1893acd098b51658d507148e3ec21f609a0ba. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bae8ce5-9e0f-4cdb-bda5-96a9a3b58c2b.json and https://artists.proofprofile.net/proofs/artist/8bae8ce5-9e0f-4cdb-bda5-96a9a3b58c2b.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 0x560644c58d7800ec13c3ee3fddea6f1387fad22d2bdd31ebd39c43c79e62a0a7. 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/ZAQ652101289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfbe7aff4ae541ece965da53a141ffb28c98ee1d545365ce8a05fb1859804fd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ZAQ652101290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15c60411bbe02531b72fb5af58459e5fe9c80e480cf2f6078342ab006d528b6. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ZAQ652101292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338ed4e7da55901619f601edf02ed4f9d44bbebc41cb994014127487057704b4. 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/ZAQ652101295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d4411f4a83458d4c72c9d811c8d7415d555be7d1f4d6d161f008c0644cf7f0. 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/ZAQ652101296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e785a79996268738e2461ed70dacf11718c7dfaf40391ab90c36d09ce4446ae. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:04:40Z), 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/ZAQ652101288.
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 0x076af0e3a3f4a9f78360a564a93b395b8d6f9ba725e72edab50b1c7685531adf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZAQ652101285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f85e33e902b92e26c79463115ee230dc138cdac5961adb5266137e3f6bd369. 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/ZAQ652101286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c5cf0ae06bda74076ec81dce4c4dd35d8e24f79005815e7f159073475f418d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZAQ652101287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a1906be126e8463a1bcc9b1e0f86a51e737ac90542658a65ff613c05c2aff1. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ZAQ652101291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce64b495c58cd9391208c562709d28d558596271331af22395f490cba6ce26b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZAQ652101293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c65e55ea081b58516dc2dfa45029eb80b77480a0015ce8c8e26a725b75737ec. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ZAQ652101294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789cb99cd32626ebee6296d1ae09c7d63938ced3aff58bea2d5cee956c6610c7. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ZAQ652101297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0666242d9ba3ee348850ff48f7f3f1ea0cefd87b601e04572b78b9c99e95d. 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/ZAT541800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce905125a034ca1e392492fc8b1053e83d7595ba84b0f22a834e19d538ee40c. 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/ZAT541800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75b2b8538283efa166ee337f7ec9b44e94810b8614f375c39a2b93edeb37b5d. 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/ZAO011900218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce905125a034ca1e392492fc8b1053e83d7595ba84b0f22a834e19d538ee40c. 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/ZAT541800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7460c1be3d42d309689a6ef827293df60ee774d32f28903b20489eecc9a1c45. 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/ZAC012301463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44d5a344e88c467ca4c96f56863aa62f369ce63136d3fcf0a01559316e0fe1c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZAA012000435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ab682701716137e9926c33d0465a3bb0cc73f1cb4396a9839ba26c202b880f. 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/GX3Q92484370.