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 0x0911a36b2319a66d21e6a3df3cfb4ba9d28cd22826bcd2c248eb8b2374161983. 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/85bfa7b2-d712-421d-8726-d4870b351b1d.json and https://artists.proofprofile.net/proofs/artist/85bfa7b2-d712-421d-8726-d4870b351b1d.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 0x80880406de134b029346f4eb3b482359f45a2a77c854b667bc626684d5a19020. 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/ITK251410089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb052881076c783576eb59f8e389aeca2f68cfba9aa2a2697168533b40ce3d5. 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/ITK251410088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe523efb456066627244eff059ed75f394254a89e09635733a6745def8336ae. 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/ITK251410090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb6a802aae3c3fdb43db0a345509206cef323591bd0ca8f82c0392afe9e3522. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ITK251410091.
Rosso che manca di sera (Ilaria Graziano & Francesco Forni Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf986fa0dd62d55e235adf82e5df867ac5d7f260a87df30a46acc8e1e562a2336. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:39:09Z), 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/ITK251710155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1e7f981114af2abba1ad91aed8224209870c124d8f1a29c59a7fc7924353bd. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ITK251710158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98d5aab7525d44c64c03cd4d81edfa3816d7d78de04efc4395ec8b3038ea1a9. 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/ITK252110003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bb50b420c5812551b22552d13c149f15c3970493e0facc14c7fb8b71024ae4. 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/ITK252010081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e2d63f4ba24488eb4209de84a6c3224d77502924b91f008158f20b68737647. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:54:08Z), 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/ITK252110000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061cab967281ba26c61fa0b8a7692c66a7b02589d297f21c1ec6ba48c57e67fd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITK252110004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3a025228761cb331cde6433a5729cbd9af2efcf162303fb4ad3263a1e68d9f. 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/ITDV42300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acf9d387574b9f951fa8de004a3647c6634d8e18ca3140eb46e531e0530d978. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITDV42300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf618b6df1edea4eacdcd9355aaf3f838e2b9b3efc066ade0c5298713757f2dc. 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/ITDV42300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc69eb5c9afc7a9868f8e0c9a2a2b36d5c31e11a9683daabd8abe620a7da3e20. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/ITDV42300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b80dc9547b3bce4038b64b9aaf9d4534c0ad26424f2244c2a259d96bfd8da6c. 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/ITDV42300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c91bacd240c97091adce840e231149b30e6e77b4108dbbf1d1fa0b444665d51. 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/ITDV42300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9bed213beb638c4b8ce7b456408259754607bea559a2e47acbab748e7576f3. 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/ITDV42300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3e5f7ef22dc637a8adb002ca7c7f3aa957b77c014e140587c8d617f54da405. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:41:39Z), 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/ITDV42300004.
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 0x2de787d805fb62e4d84f03b7394871e679f42482a520a8fff2750f7cca0e1d49. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:51:43Z), 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/ITDV42300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32654ebc6fd47fc75f314c77ee15a0875dc081ad929a6011c5ac5a2f0876378c. 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/ITDV42300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e37d350b823e0da9d316e3bb0c7b152c9b97f57fd2428a33c664c5aa2f37415. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ITK252510000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d185090c097bc7fbfdadc2797d29b10d956431bca07a8dbe7e24523a0644a1. 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/ITK252510003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca68188a39196744bf7a60e519fa9e8d4144b532adb4be1d73de2d571e32253. 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/ITK252510004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34647e12d9271e5adae5f79efae38521ccba3e3f71b22f52260157e9d3aeccf1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHX2474715.