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 0x9a074dde6c7d7d3f3616cc23f4bc9b999b2aa31f51127a3b95147c49f3b3614d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a30b9f7-2dd6-4835-a690-c45e112c2049.json and https://artists.proofprofile.net/proofs/artist/3a30b9f7-2dd6-4835-a690-c45e112c2049.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 0x865dd368a37b832c89a79a099a8310ead821759443ddd03a99320107be506280. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT3EY2493363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3f6ac72f436616a8826018a74621d15bc1b8b3164f4b0492a2959bacee49ea. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZES62534767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25782ec7e330b656578929582756641c82f84709919c35f47e66a2990ba53220. 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/QZZ7U2531797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58cf8d549f889952d7a6332be98e48f702ac6498d855b741bf63c614a5a24cc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBB2502984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0b340ba9ccedbfbaa29fc31ab468f63695dc91727c36944949cd38ac1b0c6d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:49Z), 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/QZWFU2540228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242bf20e4952086400121dadb33b7c5d97272d820c0a84879f9b47a3c4fd8ab7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:01:52Z), 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/QZZ7U2531798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d66109e622909a6839664650af22e96eb66e808ec1e2b12271bb713bca07a7. 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/QZZ7U2531799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd2af2c76db9f6ff946a0553b6855e8284296d5fcaab03de045dd3f2d74cb64. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7U2531801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a703cc854c0b0d87f876a826c5a3a32df6d17369c66c84e36055609f35f64b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFJ2549385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93827d64d0fa9be64ce74a508c7dab46204f683d576c56dfec5edded200019f. 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/QZZ7U2531802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357bfb8eedc51d8c62943610b3452057478d130a992e2aa94e15e91e7dbb573c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZZ7U2531803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c82eca7ebf9da65d77599dc7881b2e149d16f3e8ce96336753baa51924815a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7U2531804.