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 0x91b01c4ec3ccff56938959b6c521f271e595f71416996dd6be3bd165af46535a. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e196fa7f-1234-46e5-b0a4-d74971488b91.json and https://artists.proofprofile.net/proofs/artist/e196fa7f-1234-46e5-b0a4-d74971488b91.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 0xcc35cefb33f2227c19e2643641c3e3f79a2a37f19c0603de267945b1e97daaf5. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QT6EA2588591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348fd4be30385c7b6406f5daf405750065b892321457f558637e87cd79b4bd7e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:07:02Z), 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/QT6EA2588595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784bb1784556d615959e49397eea2eabd3ca4f618fa83f6a5423973b9661ff7a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT6EA2588594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ecaf0cdd99ca9cf982d65b8e8b5b50f8ce978eb5816abf4ac1d6b7ca7e3f16. 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/QT6EA2588585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d682c1e81297d583e31179822952db38c4124ed5e35616c71fac98a8696bb1f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT6EA2588583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf2a88cb58f663fccdd1e3d9df5b94f06e20d7b06e160ce2425dc6c54594a37. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6EA2588614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9946ff3f212e95a8d0b5835a368a2fd4117a5d81a28c6f9589ef3b8bbc231c4b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT6EA2588593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b363350669d26b4cbb35d9cccf29e24f3613c808fdaeea643f48b09bf775a8f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT6EA2588613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba4610f9586be951aab802a398483fb3095e11abd03a1c35c0d1c8133e26b82. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:56:29Z), 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/QT6EC2566855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b804823668c5947ed17ec5c192310db2586f54878df45fdb19e3fe29cd7acc. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:30:39Z), 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/QT6EC2566823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c7421eaf43853495c7b9f17374050355089583429045580901c83a721298ce. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:06Z), 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/QT6EC2566868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c20dc3864119b0fd32371667742817ceed3b30c72c9dc8001702525cb2288b8. 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/QT6EC2566856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94afbe0ffa90768443eb630ee6900819a76a5f68ce5c9c1f0aee554d33814d53. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT6EC2566847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3e96c5d635e5332f01729991fc1e9aa819c74a09312f40d6c1c15fb03dab1f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QT6EC2564507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509cfc44ef716c20bce698bf9ed3bf3a9466f56fde6d4fd27bd1831c34741771. 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/QT6EC2566861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d0e7fa5842e5ad761803d26dbabb25732447fd8771b2d5dfc9de0ef97f4851. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:26:40Z), 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/QT6EC2566801.