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 0xe4d7d530689aa69130d3edd0827514f4300886b1ba7dab54ed5a5e20a7e8cfe8. 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/81ac5816-8d70-4bd5-b5e3-920148402e13.json and https://artists.proofprofile.net/proofs/artist/81ac5816-8d70-4bd5-b5e3-920148402e13.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 0xb560c3832a0af3275d3d6ea90d73c9ba176b4ff55463627421e334b81c8396a7. 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/GXBNP2441342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222c78e5c6fc2001d7494439ebe4528ec5fc0b2313a98301272ca967b578a528. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GXBNP2441344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a31c33e1cd3e07564dee696117b3711ce58b6bec977d30cbf7f6765c73e9c99. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GXBNP2449557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae5c38496ef6e33f6ade290d6a38e6d3957d0cadcaafe0b470104da891214b9. 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/QM6P42472503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb929a70b181e9875259ef8430a5482ca7f352b45f58fcba44a85c4a14f9e667e. 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/QM7282498105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57bb853e9487786debbae87db087fc26682a08c50be0209de39301f0fdef18b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:56:11Z), 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/QM6P42494798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578c5ae522a84153f034967ed168ec7de4f9cef799f3606cfe86190ad4ae47f6. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMBZ92459584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb5494c1a4a2512404727fa3357bdeb2e200ec4865fa8eaca8f34f069ba15e6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMDA62408825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729e4c91946c58f8c97c7c05a270bd4e2505d36ef688d81defd418088bbaac7d. 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/QMDA72406012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90574e3dd83bc0bf3f966569ff23a3b7de6df5136f8c890f90abcb52510308fb. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QMFME2459010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1a2d6d34662be61aaddf901e88268c2ba4b2b73780a43548c95d576c2b3f99. 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/QMFME2489761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56115c4fa9a5d2652efbecde8a28288caca182d484272d75e593f379ba09ef4. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QM4TW2530851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eef4e01e6c18fe6aefe8faf1312a85f37869e324b569f1692ec95ebe4c01202. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:41:04Z), 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/QM4TX2507325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1f30236197cf79541cf2241784b9c9a989a203b7dddb7d64b923fe82648e73. 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/QM6P42562760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb85c4d6df484339243e7d31bd435536f30eac2a3349332c212e7a4fb9482ea2. 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/QMFME2458987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52980b2ccd6e38c18a4f73dea7bad9c8b46f4a59efe9dffc9e23bd7dbfa9a4b7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMFME2458988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fe9c9ac40851186e4733c3bc189837c35fa64f93e06d48f4efc2bb77ce9f99. 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/QMFME2458989.
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