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 0x59b0578d4b95956a0993c1739a79ded9884bedc713575e931d8ff9c3a99daa38. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe3a0fd9-f3f2-44f1-8737-13ccc37186eb.json and https://artists.proofprofile.net/proofs/artist/fe3a0fd9-f3f2-44f1-8737-13ccc37186eb.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 0x9b50ee99b0512b64fe2e75b73241555c32500ea8e93994b0dbc604b3ac1ae355. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBA2352193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146eccc43905689036e56154073561e4302206e49fe282ca07759125a696b9de. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTBB2319650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da5a63f71ad3fabc21a6367928de1273482933f7e8f1f9d78e89bdb36cdcd08. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZTBB2316503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd02e9922e84e248305f8cbcaf08cc3858b4bef7000a07e27428cdd7edce605. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZTBB2319070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74946c01d6ab053ae33895151c4cb7141362b8e99f123812feb78b9de73d5e02. 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/QZTBB2317263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67589ed07accb5312a011fb35d44e4f53877863d4b701834a6ac26f5f28d4dc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWFG2321676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98df469d0a34e6b7b312e814465cd060c3ac141f770bd83cf4fb7f17922d6dd2. 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/QZWFL2348405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913bea8c58977ab0989eb35a2de2f53ae5330c4a02e964911519d473850b574f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZFYY2410746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8907c337e92e17ba00408a13eb64d12357e0f5172a9e33fc9cb9d528801af9f5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ22430303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afa77ad3ac29408e38fea74626b6b9a022cd8f4e0160fd5f227c40e64511402. 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/QZFZ22430300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a53dbbaf16e0f6b4d1051db71d3d4dff170fb68c8dc3db0753a20edd9c7727. 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/QZFZ22427350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880e3de9f6e5c493eb5260b439142a55535b7b8308942c11f343069a57b96b7b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:28:30Z), 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/QZFZ22430348.