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 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 0x5315584ae1ca6c41f80e04f615926865e9249ddd47606303aa75890c5ea52147. 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/97718544-462d-4be6-aee2-e7c3ca468adb.json and https://artists.proofprofile.net/proofs/artist/97718544-462d-4be6-aee2-e7c3ca468adb.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 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 0x8a8b87ca5d3f6da9bbc5070a2ec135cb69f5f18ad32a0cb32376faff29f32cf1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEZC62350837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cca8ecda4a9ba3e7f96bf3fabccc8741eccb01b4eb3de232179857470967e7. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEZC62350838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5528cf81c51b36412f264a32472e0bab0a2da259b9f27a406aed6e7e01fba72b. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEZC62350839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078971147ce097cfee1da7faeffbc8fc6afb03fb9f0c8e5d4757cbd954503241. 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/DEZC62350840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329c1b20b5646bdd99e4e9f94d04c24f07f78c500b297c6ad2d293e38fd054b6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEZC62342781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34a1f8cac89cdf5f803267e4fbb2155c4c25be000cc22af3e997495624e1ded. 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/DEZC62350841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d145d02779216c7c44553ca4d4eb0cdfaddad728d53c349bfad61f359b6b21a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEZC62348192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5194f8bf98f6019d3103f3b76bedf6ffdcac5ee58167f30bc88cb3779ad044a1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEZC62350842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f75b2b4fd1d0b232da1c2442c6ba3efd1d2a1d8e9144cd9be1b50d59f7c89b3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEZC62350843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc944a592fc04baa0383f57b2018e6c3608f4fe258ac59eea487636fa44e445a. 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/DEZC62345609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd723373c0178cbfa8de5d2a720311cf5a5e4e55a2aa0131f0dfedffe398445f0. 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/ATFV72202115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb144f174491ef1d78f6a9f069dc272419568e35ea6fa72b1992d58b350b75097. 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/ATFV72202117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e54b6ec799c325c8846818891b44929f8efebcde6a2a264f9eda86193b81bc7. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/ATFV72202118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3ade23ee92c3a30d40027422465ecd18367b5430ef84accef3f291f9f3950c. 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/ATFV72202107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6910dc47c6226bce2527bfc7537543130b3945bd9b449c1ea9441367e687db87. 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/DEZC62378059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc944a592fc04baa0383f57b2018e6c3608f4fe258ac59eea487636fa44e445a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEZC62345609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329c1b20b5646bdd99e4e9f94d04c24f07f78c500b297c6ad2d293e38fd054b6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEZC62342781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06c2844132d6801eeab242d05aee31f655dcf7595a4d381a52db640f56a7890. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEZC62339971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a4a18852f98c8301a7d0d4067e4697a684566a3cd823199a4681e36f89d04a. 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/DEZC62333366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05f9ff948e184e39e3eb523d15ed2cb9b86c8b6973be2564e9ebb77e50fb67f. 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/DEZC62325612.