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 0x8ba12743368a94ddad1d93e9cd8ea5fde8779b40b8158f37d0d93300d9223ba0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6675ada-a0cb-47b4-a9df-fbe4cf32b8ad.json and https://artists.proofprofile.net/proofs/artist/f6675ada-a0cb-47b4-a9df-fbe4cf32b8ad.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 0xf9a64412a18b28209f83cde7afdd173aba238a77750500009963ab8a06b7484c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLRD52043272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318960dfce23d711b200829e929da06754e7ed303e0301b48a2b5cf8d7ffcf02. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:44:40Z), 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/NLRD52043349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc035ae012f62e13c08ef6ad5be507e8afa879865f5309be6815a1dd4cdac9ee. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:14:17Z), 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/NLRD52043354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb467b7042258954172ce685cb40b1ab7d0e76a09e80cb1326e1eb101ea1060d1. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/NLRD52043357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c69c5cf7f66af9f0f77240d50896b41a0f217c365ad2f4da246724366d1b13. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLRD52043358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e547847592e90530e16541b02fedd3cd187d63514c1331bb8e508a64a3d8d5b. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:43:27Z), 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/NLRD52043317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74918ab80330f961c9f6309d2a7bf3c14294514bfec4aa38fb3f94105671ea45. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/RUA1D1932025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac1f7838c69662851ebddb90d68a3095044dd541971466ffcff1377b257dd08. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:29:14Z), 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/RUA1D1932027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08f90333099fad9e8ae4b25d4115513664224c1b9075f3bf5a6059b67e2e546. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/RUA1D1932024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bebaf923c0d6fcf0fd00fd25ae960eb3a543d54d201071ba5e464dd80438e7. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/RUA1D1932022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03eb61741971622b0945c63219e2cde21299b5bab10f586fc1d7d98e7763d29. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/RUA1D2029249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dbd3a2088170020a632677b023127bab46eeb97b1ff18d5f09d00799b2b3a8. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QZL5N2206457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb4e5a467dfee47de309febaa3f9c24c0606cfb3272b9c04a0e1eb5ce249bca. 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/UZNVO2500108.