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 0xc304ca5e368a0d135da8a5b12090a21b1f2e7a92c5c70d47a54ff736f9ad90d8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6163343e-a77a-44b5-9ffd-45c7453650d4.json and https://artists.proofprofile.net/proofs/artist/6163343e-a77a-44b5-9ffd-45c7453650d4.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 0xd708be3c63c05756fe931fbddbcf1055f69c32c3926a52cc847ad017ce66ed69. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ITJA21700416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e6b43e4d0af0dc2ed6e1c25d19a387e1794b6baeed853bf6763ef154643aad. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ITJA21700417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87271e9b56d45787c4abe2f426794a07812491bcbb275de4910a561e5db995ed. 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/ITJA21700418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e601ceac6f4e7d5359e14b83793fae5c1e275e6be6adc0a10608eaa963d9b3b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ITJA21700419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0001b3e3e13071b367c7a524e77ba6ec15800504b3fe9190a4dfe77fa826d579. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ITJA21700420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e9bf08d4d860a1f041fead8b3531571d69366c8d5584af29aec955832ad1e6. 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/ITJA21200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50ca81747930f71bd27d73495476cf489cfc01a36900d9ce97550b928763ce9. 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/ITJA21200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088f332bd716c8f0af84b5e95a1f0e6e8392b30fcfa1a7ade2d0492f0eda72cd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITJA21200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5275108ba3f5feeb5d2aad36de2d22ea2bbbec540be49d9c6cd96490b2a3f572. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITJA21200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf2888e1c7ea4bc2505dd72dc75fb75b8e6bb949298b86491559113ef3810b9. 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/ITJA21200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5376fc0cfdfd58c0ef37e20aeab1c711f12c639a56dc8737f7d08bfaf1b91b. 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/ITJA21200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ccfed1a1c3e6c580f4e8c460def3bfd45e5d788545c346e0b2b28c0cfc77bb. 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/ITJA21200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318005be4bfb385e1bfce775e2e2aef238839884631fda0e6cd62cf084fed966. 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/ITC940500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf6e029f44ad09d213039b1fed2e4c8c9747feea201138ebeb225677ebd5ccc. 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/ITC940500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a12d1d47c47e30adab2c6657c66bf60aa9caf6b0b1014c7bf56f9ef009ce24. 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/ITC940500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079734254d566a84de1f4207a56ad5d5378b18e154ac9797d2706adb4803e25b. 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/FR6V80123560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c2167fd06532902af8f9cdc222bc1c41171a8600c33cc16e2c3af05b77028e. 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/ITC940500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d39ee83777c6955f34d6764a2d7ea6941d16c7ca84a5916ce0976edfb68cbf. 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/ITC940500307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8bad0d7fcf4b6519e0a88d0d25b0fce481b8cbec5fb39f37c25e1320a3aadf. 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/ITC940500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291eef9cc8191ac2f938f3190c6533ae00db3029e75f3f8978bc25ade59cd775. 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/ITC940500309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1698731390ed8f59adaa41ca5146544f1eabbee538476ab17255553df4180695. 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/FR6V80123561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606049357770b924d71ab67e7203fe081d9ea83f46ebb3b774bb3c3f3b090e4c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITC940500311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db7e4c45c7adbd8fb8c86e988e30eb80edca244f486f431543c9dc9b86a6e0. 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/ITC940500312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af66badbb37a47d0610569f8906dfc505b81c81d1b8506842c40f62ba3427dc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITC940500313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e33d6b0414b10a8a72739c9077ee8dd44674b4cbb7ab854999d45d7d7fe2e9f. 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/ITC940500314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a3c71cad5fcad12286507e18aca26bb31bb126dae1da04332c68de46029f92. 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/ITC940500315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c64df6329e9d919fff8058823d68b9cab819afa0700388f7496d8135e21358. 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/ITC940500316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018e1a19ccde5ac9ab9e81c746f52ee6deb6c587949f1d0e5b451df789408302. 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/ITC940500317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31839de57d8236254162d8dbc33d65ceb0148c42aa0f3ec0f3f3635ad4ac56b0. 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/ITC940500318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939a8f9271f59053357fd719c814b71c59eb4fea78f113ee0b000e5478443aef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITC940500319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c14ac473a9d9482e4dc7b6a8d8d06638996381a060feb75cc74d4c967bc955. 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/ITJA21400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacb0797e03ea806c9eb0263ef54dc0b3e380e6e8b3644dbd91e305ffcc46a94. 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/ITJA21400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806c01c4040e3e7866d2176b6273f33185c3d1a0a8985fe78d78e24f8fa5abee. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:10:37Z), 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/ITJA21400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67654e7c40beb31c8c8c04c830546edc2c7b7e5bb37886092d16bad305e0b9f. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ITJA21400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215b1a52fad032a253670f7d38f80df84863988b446c3d73e6c1cc1435623df1. 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/ITJA21400163.