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 0x5395267395bdb00b3893c4dcb8dc3572735a7930f8775ac757e6f054b144ffa3. 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/663b744e-fd74-40ec-af5d-8b8ea20ccd54.json and https://artists.proofprofile.net/proofs/artist/663b744e-fd74-40ec-af5d-8b8ea20ccd54.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 0x25171f2eaf07cbd478c3026288d771ec2fd7807a8d58bee7d0deef27d8f396dc. 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/QZHZ52156570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d417432ace796564566f683044ea98dad1be9c04052e717b422807486a67db5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZHZ52156572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1c37392b232857fc0a64494c171cf7c8c8aa50a6437f8f9fe929c346297e11. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHZ52156573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5b541e61f995441f645a2852886a760c117c1fb40111dc7a2a8a36586ce981. 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/QZHZ52156574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2848510dd8547228969d1b9fdfa06ef7beaf4764779435477c0142af94fff0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHZ62117737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1116c98d269a81aae314a9d82e15f7f5a537306a372010012647d3d23d3e52. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHZ62117736.
Cheios do Espírito Santo, Pt. 2 - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa55a27934547166ef999bd396890316befc059681445e03ceafc507ffd709ec. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZHZ62121927.
Cheios do Espírito Santo, Pt. 3 - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae38105466f1ce31bda46457adf2c390b7c7a870a3969d134d69095f1f3d84c7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ62121928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40d6af11fdfebdda43cfe23b3f18d5019b8d2318cca9dfea1dd5ce79871ead8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZHZ62199925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b0432bccc8b86bdb001de0f5acbd30e6cee62616900343501c67105ef2119a. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZHZ62199927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692a0f7124cdc301df823bb00e42669520388764252fac462032c091e0e44a67. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHZ62199928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ce7b6196657b5db2cbd2bf130c8b08c7e471225df32bdb7a900eadcca568a0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHZ62199929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f3237b29be2bcce0ec5514d1680721df7a27d51ef0066cb1b65527d29aa0a9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTPX2246083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d0c161b55aa29090713d821697162827ea3c0491735036c77d1f8d025dfb7d. 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/QZMZ92323241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8d6cd90d5a2cf768b6593c16afc49c1ae2e24a9aff4055213f807433f92ed5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMZ92323242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f532cab96d6685bcb6b9fcae13ade73e1ee3007f188cd73e6870650f5424c2a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMZ92323243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274459e2a2253dbfd7ac632ed72da2ddfe4ecb633e430ba4bce9ad538f3e4c1b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJZ2376133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ca256bad74ec64191bcca62d435735f8762fbc3b2453cc633e76a4e7f8469e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTVM2477205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5e844cf37a84104c5518f44ea44046ce4fc4420879025c209d2b3c50d7f8ec. 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/QZTVM2477206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe897e645f13aeefe1d5b3b9b80f78abd5cc793ac37976e05704b0e7f21eaa048. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZTVM2477207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925634618ce5390d3cce2a64535f7d1d1a9840bb94d1d48a606cd4e251293eac. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTVM2477208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a617bd7fffe28d8577ab7c23e23793b641581acbb783285bf458c7e9d91f041. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJY2530783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dd0934974a68063644e3d49cb25b2b0497bfb33680bccd7a43c53c140891ad. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJY2530784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ca9d350f0f0c6ea75488d93fffc4d2faf3d887b447b7d3b205ce40b261822c. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZNJY2530785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1db95fc9012cffe7088500b832e75b2d2905efb4fa50115e89d13f8bbb9dab5. 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/QZNJY2530786.