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 0x788124db1dbe6f9db41e3bef8901c87e1390d4f314850b81659a41db66912021. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c67b3d9-9d93-46d9-b31b-22c8e39013dd.json and https://artists.proofprofile.net/proofs/artist/7c67b3d9-9d93-46d9-b31b-22c8e39013dd.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 0xa88d4f3c98c1bf0c2d76d6115fc8e5e778b148b887bef94dd06200255b154b7d. 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/QZNMW2178753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd96eac96f7a73815fbfccb635bde606b693e282bd859b85d6319f5c5d784ca. 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/QZNMW2178754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121b2a85fb35301d3fa3f0f8fe69832ee91351c7dd0c42f3af1a54e07d9d1fb5. 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/QZNMW2178755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197f76956363a2f22062e5ed581e7b42d9553e30a7ea7599d028bbfa12ed412a. 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/QZNMW2178756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8d6205ff2335e0993d16d3b82f94a3980504dc8bdc61ceacd0cd5a5d8d0e66. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZNMW2178757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30435f90e9f8191d3723505f8c873e6d58899b18673acac85dd73fa84ab5fddc. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZNMW2178758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac02c2bd3497d8ba6981c78e5a5482757216b4ea256e711e8cf62a630ab0106. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNMW2178759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84c2684135b15667f1498e3040da6d6b8be54f4d6073caf6f77fa6cb5a37b0b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZNMW2178760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacf7e1ec4ec69e6ea85c4503ddae11a99e1908fcf0c074312fdadf371334f43. 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/QZNMW2178761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a44460d81f6e7317cbb24fe4c0d9859549ed44e976900f65cd9846f43eae35. 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/QZNMW2178762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1105c691a28d8559b9bad543ea02c65a5ba24223b103677f556ae88631cc457c. 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/QZNMW2178763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2e213643bc39c598fd8d861ebb63c991c883ac2c42409450bf84b62b7358af. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNMW2178764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11b9583a0d1622457ea8be74a134b107559c60a799050bdd7b722e67dd986eb. 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/QZNMW2178765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827933f90dc2c236a6c0c8912428fb4ca341ccd667599f6e65c69c67c022ea03. 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/QZNMW2178766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6f07f286b45d698b7683e1cfd8a6afd20f290169d5b1f811eef3fb3025aa4a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZTB32209422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72852015fd8dc72df9c64d4dcacf82217c4535161b677ace40329a9fd9bf5ade. 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/QZTB32209423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7d6667642686afdc256693126b32bc6a3f45fb9a4cb3c50b3323f7f315c539. 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/QZTB32209424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870b021c3511fee9afb9de612d4450a7f7ec1762af1854ec972f704497ceb181. 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/QZTB32209425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa970bb485a5ce06793afe79681663e6c11743f0701760814ec1cf75ab63a66. 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/QZTB32209426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7bd0fe50973019d7f43306b19ec7b50dc47bb4001449c2dbf7b858d4f49bb3. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTB32209427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516458608afaa2766fc56f8015d0709007d6ffb478247bd90ce3eccc70942d51. 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/QZTB32209428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa056504b314a016ea410bd20184e3835afff1e167aee4209c873fda430d54bf7. 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/QZTB32209429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d76f93c63267a40e9318e56999c5362dda649c597702bbe2b84506151ca82cc. 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/QZTB32209430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730521a2a3da3c1d849d7962fffaf0c9363c747e56f18b20e72d0d2b43f72538. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZTB32209431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ff3e4af1d2b1d4d35cf81945d00bda4b5485bfc43b93db1c8f0bbd9f5118ad. 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/QZNWX2416630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d033ee50259ad42ba8591abe5cea1d28e31a4127d96decdadc6bbc9a7fab16c. 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/QZNWX2416631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ace20403b2c00d1afd4c2c5f6c32dffa9946290f7f5c5b532cfc03c0d5ba46. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZNWX2416632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b1491ebb6bc7507c4fe9a287f6c3e42ad2285d7ab5109df6152b732c5f4d0a. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QZNWX2416634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8add1bf5e6739c79759cd376c2a5e8ebdac249bbc3c11ed6590d2d36e0928e6a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZNWX2416635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb375dd028721e245acc02375f8fdcb6dd569f73277e9b5e6009aa5a29da9abab. 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/QZNWX2416638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb671a0e2639b08c36ae92ead419158ac21ba4d1998a6aabf0225c2647a4929b8. 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/QZNWX2416639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff299e2304afeb6e881821f8ed654b4e2c8fa464b240a5d050ddb54c9fd7ecdd. 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/QZNWX2416640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8de31d337d9564152cdf0d9a07470e44d55c443c4a25597b17461dd5c216b2. 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/QZNWX2416641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b01c7027346d9706dae6ad0fda1761a63d8698b89ecd0e96dfb236bb26390f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZWFJ2322668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448b3286901668868637749b918d6748d58462f4a5d91173404c56b004293aa1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZWFJ2322671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a045c32ed14fca16106add5f5ec95c05b38c476ec69c6620c5ab499f1711ec. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZWFJ2322675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb7c6faa54aebc2e0ecd21817633a7c2f217d0cb9de6549b84126c264e1d944. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZWFJ2322676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4465bbed7ff012f55de00f540f1b84bf1d2dfe7de54e43f4c55ba02137ec2d75. 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/QZTAU2237688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cb76c62ccc182b1e0fe6e70cab2deee17b3c03b96678eb35e9837a54cd1bc1. 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/QZTAU2237689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4aa6e131ff25bbbfaf4b8acfdf9eaa8908e583e56cf7430c42567cab52808a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZTAU2255926.