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 0x312ce920faf58cd285648290e7488c8f908170ec2799aacef372ab289729dd29. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e4276e6-26a9-46a1-95fb-c8d6d1f580c6.json and https://artists.proofprofile.net/proofs/artist/9e4276e6-26a9-46a1-95fb-c8d6d1f580c6.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 0x4941ae7c8a8a337aa09ffd4067d67b3e2b288c8517369dc0e38ecc8372800656. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:43:56Z), 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/QM6MZ2191069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc843a99718a51e47e87cdcc19ec1d5daef37b56a0b8fa9ddd3b3d9d77b7d3c3e. 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/QZHN61958069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70294e0d25b601b6644727f7bc1e86142ae80aaefa8e7d0643ecdde7d7a90236. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZHNA2025431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba14882bdcaa577996a052e2d3a34f16b289634b6abb597c017494cc8d94aec. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6G2070861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c569b35ab50f6887599b695e49e74f261a5c56867d2466945d436f757766018. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWR2020862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b32975b30c095a02ca87fe6e0f5e81441e98ac74a9bb64acdd171cd5a9d79ff. 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/QZNWZ2026112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be725964f56b520b41445887d32affbb492e82f1504443495a35c04c79753d5. 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/QZDA42157267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857944742a8f1e9ca3f4da1733b9850b7e82b5fa6acb992537c5aec622a2314f. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZES82185941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf951a272ae6df5407ccf8735f5594c54ca8267e852c445672c6dac2231896257. 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/QZHNA2140677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6e86eb2e06cdb0616f77adc641e1583549e6683f637b508165b06f79f74133. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZMEM2182762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6fd29a5ba34a190e4f85e5f2fda6175931266cd90c73a8bd8e879c91278c39. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZRP52158052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe072bfb0f677855031ac7d140f8bd31af1ee86d7ea1772428f629b78d1ec3ef. 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/SGB502247030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4cd861818893f1e89e05e0dcef16cc19ccc834fb17d8327aaedcf167af6c97. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZNWR2298653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf569717edc3f14435ca5392993cd333cf3a6078c2d2fd091e2e45bfcffcd9d. 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/QZFYX2335977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265843daf148947d35fe5698bf35da040500ee21f1cbe445c26d5cb9a0baa1f4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZMEQ2333556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f558c2f563d4cd55ed38b9ff954fefa53f45d773116d3fb01a5c90f1f94cf1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:02Z), 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/QZTB22440184.