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 0x57b854f7a1af30e81a95e16457c14198d42f77cf26c7ca786007a769c28ea340. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90eed6e5-9a83-4baa-9540-3827bc56e228.json and https://artists.proofprofile.net/proofs/artist/90eed6e5-9a83-4baa-9540-3827bc56e228.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 0x374b768d80798f8cbc173ae78830aa41eb612abb7ed08233526b962948348a7d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:48:44Z), 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/QZNWU2350158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dc2b5b5fd5b2e6cb39ab57f5608daa709b4d1b2bf8e6f60afa351302fb7137. 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/QZNWV2342763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f167cf3171d5eef9fde0f4d1692facc43e269eae87e24aa42adc68e3801a5a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZVEM2352050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e22ec29c2600580990b783c1e7418ba894b9f01640a3f41901748a3f9cfafd7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZVEM2353127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b252b6be91889e77d8ec8391b3af346cf4a854b2badd2a0a4348d3f4b7cafa. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZVEM2379127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2913705c584ed7b36cb0e8850fb13f12400bf363428815a82383cc52bdf412. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZPEW2401515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c22ba380544f8206292ae62b4cb247e895979690ec480156cdf1642790e691c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZPEW2401516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43f9c54a53840eecb3f1a3f80cae37efe7361d12d2324720b7830c5ea635770. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZPEW2401517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbaa7846e075f9a38a7efe882bf315d37eb6901c4b261d402996141700aec21. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:07Z), 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/QZVEM2388570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645dae4b3fad5c855db8a96cab0a837324aeb3ee6f500d395cfe573c6d4193d8. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZVEM2362719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9f5bf8bd09f717a4baf9f044925d585516cabe9ac47763a7a70c08a0cdb2dc. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:23:04Z), 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/QZPEW2400906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed89b327d45608050cc98082808f99a68741743d092074ccc1b3d2145749b928. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPEW2400908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958eba9ff4fb23e88e92ff77543deda26f6c4811af009888c62c4e2bf989db5c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZPEW2400909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b252b6be91889e77d8ec8391b3af346cf4a854b2badd2a0a4348d3f4b7cafa. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:21:49Z), 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/QZVEM2379127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09464fe81fdeb998f7e9549dbfe1e6b0a65af386fa04020015c7381b809518. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZPEW2400910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12412b31e7601e9e520728ef8d490de0953f1f68133027e2dc1d4db7b13b65d8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZPEW2400911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f76d194ca26003550b3349749c070a1149af9d90cc7f6c8a04b6dc88f5d7cdb. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:43:44Z), 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/QZPEW2419514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fc3d6266b8072cb3c0c7196aeea2f552bbd1e1dd11c07c39492dfb01715f47. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZPEW2430307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61894de49f7572143929444cf318f8417f810971721ec17c4bb3bcc8ea04047. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZPEW2451461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba88cd5ff3da8577d15a84e10c10c7150e2d483d5ce605e0186e9908ce1e22d. 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/QZPEW2499783.