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 0xc31791253ce6d9b577327cd5ab61db37c0f5370354703acf9c89321db78ab55a. 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/38a17caf-c878-41d7-a73f-9ae06d8cd249.json and https://artists.proofprofile.net/proofs/artist/38a17caf-c878-41d7-a73f-9ae06d8cd249.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 0x8264efd9d8995ec280f37a6e47437eb11aa9a7d33d6e8903ecc6ee3d08ebd3d0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:00:29Z), 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/QZNWX2317885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7d8b36d4217a5c3bed8e814c8ee170a11707cac58d0da4800842bd2613788e. 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/QZNWX2313057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc1d4dfb8045f08d2dd5be0d094afb45fd41bd5ea1ae5c5ba98f7a0e0742b86. 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/QZZEC2430686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a8354722d8b3f204e296d456893d89dbe731acc455921b1f3b909353731847. 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/QZZEC2430688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc1d4dfb8045f08d2dd5be0d094afb45fd41bd5ea1ae5c5ba98f7a0e0742b86. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZZEC2430686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a8354722d8b3f204e296d456893d89dbe731acc455921b1f3b909353731847. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZZEC2430688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fbb59a421727cbfa0f76e945c19b0bbdba38e3802449ce6aab4adbd8186e3c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:58Z), 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/QZZEC2430692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb471106658ed5ec243fc2b6a102ebb5058a799f1d47994b106b01590826eef95. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:09Z), 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/QZZEC2430695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d945faeb45427ee5fe5683d38315448729518bb41456bfdea8caeeae2edc52. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZEC2430720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd612c3a4ddca094d46d51cf0915c1749e8bc251a5ab4baae479ddde9b597334a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZEC2430721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85da874e4c5cfbc0838fae845aadfdefc6a2b1d28366c59cd82bcd5da1d1cfd2. 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/QZBW42403901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f07a5066c8c61541581eac021d340054250ff61c0fcb3495ba7d216312dea7. 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/QZBW42403902.