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 0x41084a61c4afc4a0aff285f1aecfe2063f0abeb5d8f2421028a7ca0851dfa4a9. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/296d7a0c-436c-4d32-be85-0d65371f2119.json and https://artists.proofprofile.net/proofs/artist/296d7a0c-436c-4d32-be85-0d65371f2119.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 0x406d96bec368b3336d239fe957e9ac58265eecc270f4403c1da34b2412b2b460. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR7310800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7086f2245122db869f23151bedd959f90f76f4ca61f5dd51402fff8fa77815d8. 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/TR7310800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd962ca8d84f6dc438125c3a8e4b486312d2697aed6d85dbf28c493e68150d08. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR7310800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72de0d40731102b682dd9f0334fd8ff023831a3400bd6a90d434d1f713d6aa7f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TR7310800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4728b42e9784e80c2ffaf9f061522f1249100a19b78babd8647c962f5ea1f0d9. 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/TR7310800094.
Six Lute Pieces of the Renaissance: No. 1, Vaghe Belleze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a1d98c527a59cb7dfe68ac26de89e3c70b3870a4593b6cb4214493c107e886. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0282306794.
Six Lute Pieces of the Renaissance: No. 3, Danza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691b743d601c1bf37bab4de6f1d12d1bce0c2c0fbfd7790d65982ab21c311b4a. 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/TR0282306796.
Six Lute Pieces of the Renaissance: No. 4, Gagliarda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb7d9eeb27f4cd59979f97b9099d747a659fbd60456737034a2aea928f4d417. 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/TR0282306797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2072f664575895a29f41fc9e06f690595925a5317f1acf6889f17041725e6225. 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/TR0282306800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374a4b6b3eef8f30df289059c2162a63d9cd0c16827e5dbc7a4a9d5fd08049cc. 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/TR0282306802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c84ac52df5521c229ba4985b0eb7c01939ba5d6f24b5a6d1d4ac79c5a32482d. 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/TR0282306803.
Pequeño Vals Vienés / Sevillanas Del Porvenir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508e2caa1f87b31471ab68ca962644df0a950468e0c750f3c8c55eaff5f3eb00. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TR0282306801.
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
Six Lute Pieces of the Renaissance: No. 2, Bianco Fiore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a1dfc9a2fdc11cbefc5cb88c5819e1f7e232ab7d5d5daf489a48b1b243cec6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TR0282306795.
Six Lute Pieces of the Renaissance: No. 6, Saltarello
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f380227e6732a2060b620df0a110d69fc9821f676aa89ccbb14f7d47866450. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TR0282306799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9d0cc558c1ae2106b4f614128c08c036f6489625baf4e7d7e44898bcb2d79d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TR0282306804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb39868c24bea8109e672bc6cedb02a0fbd74888ba22be4f1493c489805763d. 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/TR0282306805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced6b4aa0e1743cd4c38ae57d8291cf27caeccca280770acb65dd59731f855eb. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TR0282306806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8486b04da5a2c7c95f46101b9f5d8fd3360b618b39a1f9471aeab3211ab258c2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TR0282306807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb0a5e31dcae4a94462a99e65d6b76231cb155a887944b48b25038c79b0ab71. 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/TR0281906127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49ce3df6c3353cb12f43b1fd4ff8e863976e099d5c20ca9332871034443a58b. 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/TRAEV2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013f1e098db04ae5f25bb39651937610aa75b48f52d1ad6d0bd603df2ead3fa2. 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/TRAEV2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0663771571f539a428d326ec03a14c2849c1f40251078bde3f56a2f01efb757c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TR0332212999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afa0fb8e27bd66092bc855d5ba5f643afbcbdcf022f9d8ff7ced82508e5d9ca. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR0332212997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197f0b0cdd2522ec26e5a43bb1d9d14c06dd9085f58d788871b9c972fbd59f02. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TR0332212998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cb39e0693793ba60d0b9ffccc6dc431926548a3edeaa89a2f0a74382f78fae. 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/TR0332212996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc816288645b86be946b145c18c7eb2bc82889e39f8062bc9f045fd6170b01601. 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/QMFMF1905822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00fb91c6c64d6366a50d7412d330fb6ef7a519b8d47a1bed9f7fd26cddb86fd. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMFMF1905814.