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 0xf93f5b0c78bc234cd52f03ed4cf1c0ec214a078d05d0023b016c643eec13d1d8. 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/6f439f07-c817-46b1-aaf0-3344750f3006.json and https://artists.proofprofile.net/proofs/artist/6f439f07-c817-46b1-aaf0-3344750f3006.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 0xf85861c3740025070e16017ae2ea15eaf6eaaa83f8202722e7e04017b0c78260. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QM24S2004687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eaf3f1be9ba6dd775e664ec29f6aa6df21687f863d6616f4582f57106bdf42. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMFME2298105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51405b09f12fa2e745bbea3e75f2fe5028c7d24286d9cd37ddcacfba72d919fd. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:10:46Z), 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/DGA0L2377091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fb609e09bcfeba8cdc6261711c86bda31e91d3bab34cc2a5a43e76ac25594f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:03Z), 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/CA5KR2422717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245b816fc313cdf600918b1777a1bf7633265ce9278bbb98e487fc0e3b77734b. 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/QM6MZ2428797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c601d4e5444ddca8324251976b1609db22798e936d6935b98ad5f45e1a8d3ca. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:03Z), 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/QM6MZ2428798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18feea2a18ffacba78f01677f1078b9b725852452ea7ac5d3e641f5bac7fe7a0. 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/QMDA72490171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ae980222f1f48b39471703b76de25ecefdbeaed7a9959105e8e67898c5a33b. 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/QMFME2445012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57041d7138fbb95ae6d7c0bb0f93749ef634fda99f02dde787c4c9ef9c9d6614. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBKQU2501594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dfd8af01f88f46ef98c824f1616d80d63a4890af370792c15dcc1fcefb76d8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USUYG1716415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58906ddcfa6820d213032fa1825f0bf576a5904ad4f401dd59868b909b9b444. 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/USUYG1716416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad2272dc68dbe79df58ec480a596315660e588309e6aef8fc388dbcd4f25cd0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:47:22Z), 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/QM6N22532880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57013763a50e16ba370d590fceb0bac4bd3ab492793bc5b3d79373ffde19567e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QM6N22532882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ac58c82b9164fdf67c8bd235ddf0838d22fb65cce5f812c81a8643bc90656c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6P42532318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae06355b0b528c35061ab22d37b8c81d592f72c101686e359988783a6660227. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:28Z), 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/QM6P42532319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe31d63c8801e9172855b237a61e36515cb6b9854cccd12cc5d1c0d030b43ca5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6P42532320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f57194055115369166b365182a8e0176998fe1f5666ed0c6728de4ac3bb3cac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P42532321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220f9085aedc3116692e8dcf6832abe97aa5f4f0d91658d5bb22053535130b90. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMBZ92591269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc089683cca304bd9c6b80f965eac55df3266e164af7a31dfddb6b1d3706bf1c9. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:46Z), 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/QMBZ92591271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252abdd4cbb8e025ba09a1f5afd5a3e58e6fff142889003a9b5d1a566e62f890. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:07:35Z), 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/FRX872557893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6b81546431985004b8013d179d7a0f2db0bdeefedbcb1445755009a1ab8894. 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/DGA052508409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf0c77fba486afc7a468346b398cdb233721e53e4d189cf08d3258a409ebfc6. 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/SGB502397178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137608a4d696ba8d1f8b12429eae24a33d08dd332ffe0fffa34b8f972af23f29. 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/SGB502397179.