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 0x19c8558745f0f963f0ad1a0fcb40f5c3a95442dbb3df26040b48c34a4fe8b9ef. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dda18753-553d-461d-af68-325e71db398d.json and https://artists.proofprofile.net/proofs/artist/dda18753-553d-461d-af68-325e71db398d.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 0xb7a2f2abcb3fab14bd932b6a934a0ce8cdd4257c482b96a2b38a74a08a080d84. 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/GB8KE2414863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e6f6bbc4d28c5bae2d752e511637f88934285ea3af8aba8b41145b606a0b38. 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/QZQGC2300417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeba7d3beb07df12c45cfa8e9710b558978de501219b63ee493cdfd942e6dc8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZQGC2300414.
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 0x461af8e55ed2b9fabb9709bba8f253a47469712922bba18b948d3619bfa290a4. 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/USLZJ2536242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859db327335882cbaddfd9709d88fbb944f4af0306a817009c3822b8607069bc. 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/USLZJ2536245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3166715afd7c3006339e0b2ddda362dfb25c68657181f3a28e15aeb96180540. 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/USLZJ2536249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbe964eee296347bf442b328ffc3fa23766b8189dd86d7e8ca8e2662524e57e. 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/USLZJ2536253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad587a19cf7d286ac2277b322d37fb35ef1fb7f8afae907a79b5a03bc0fbf27. 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/USLZJ2536257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0d6656ee7c55d48fd75a5c0f42ae47ae72ffa9a55aefd7a0ac66a96c9147d0. 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/GBKQU2519090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d8917f6a9c1bed19f2036e7d3b83d4135f932916c3087139d56e94312f7b58. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBKQU2519095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8011ace43512187e481925f77a7d8d6c279ead4d4777cb778b993cd5ff89c1. 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/GBKQU2528716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298fe3344a666bf4560eb1c68f72a37ee5dbc69b68411a7735309d87f62fca64. 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/GBKQU2528717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6aafcdee5f6eec57272925a9ac708f839b561b5593e3cc955cc04b351fcaf4. 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/GBKQU2528720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4f8e81e9b839622bc493e21257508cd596a7602b12ccd55a2c037af72df873. 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/GBKQU2528721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7c4d2b6bee4d76329c72cbd39e4763fabbeb6a8f2b829c740387e4fd043d04. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBKQU2528711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a7c7e44cf0efc19272b149268fd30f5c88f8b740003e7492b4fbfa17443880. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBKQU2528712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591145e136549d2ab699157eb6a8a608770895d691112db48759a35c23798b0f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKQU2528713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaecd06304f5338f2c44e514782581d495744546a24f4be778ec99f30d5bc832. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBKQU2528714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26b9b6fa423060676d03ed651e104f43df6a907cdaabb93e579ab97db1aa15a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/GBKQU2528715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e93baa883f8ce42347b2053e2f0b044f9841f98a45bf42f2eea43096a1f239. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBKQU2528718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbfb1f0e3f09cc8d990aee47c7b64183c42eb0940a87959417fd8ba4f952cbf. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBKQU2528719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd396b0e0db6d84b3c39f5eb634d7e210ad165d1a440062c1ff8f57fd567a5a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBKQU2528722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2169bf914b216f220ac4dfd1fd2bbe3aadef80d3342a0c534ec7420368b92ab. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBKQU2528723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea5c4375a36e5fe9087e93c02d71f987529041d6f02d799cf5d543f9fbb8f87. 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/GBLV62405261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf824e3c632b62730b6863528700d56b762f1b1ded135fd22b0934ecf6248d61. 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/DEY472478287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42228dff209bac41afaefa287c74ea9d02e447f222297f7c408613be1a3131c. 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/DEY472478288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac443e81c0aafa0a91b44c5fab5b1eb6e581939ca806293d41c562e16c2d8405. 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/GBKQU2510567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e693d32d5c0a46d8a09cb9812953701a4ecc760cee44dd353b36b0051444b32. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/GBKQU2510566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1685a16c7836da7feec6b388eccf9723e2ac20b47197ef84ea93b4ee8c1cd66. 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/GBKQU2421614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bc7e74b79852123f40480746f0e2f4ad5bece4bbc6ffa4f693a9d4b7de52cf. 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/GBKQU2421624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea768531808d7473f49f5cbb2fab2acfda42a65742c319e7e8aa02be42916b2. 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/QZ53Z2500214.