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 0x7e486bd209ebdd73154ddc28a00f21bf3ad9fd5ad8302816ef2e9d94b5dba5a5. 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/0f1439c4-1519-430e-9b21-0f403b8b6cb6.json and https://artists.proofprofile.net/proofs/artist/0f1439c4-1519-430e-9b21-0f403b8b6cb6.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 0x14b59022f5b0d57554c4d2f7e5318577fe01f16f0f25904d0b60ead840b2123e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTV32371659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c792bdb2788a2cd29744bbaa4607cc7113c49b3fd9e6132f278a501c47ff20d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLZJ2180564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3449a8bf435587455b547dec8ced7ed47c6abe7301700b3440b80c3a4ae264. 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/GBWUL2408583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5870af15f63844a64ee7a7c5a501c7f153785b902e323f20ba1aa60b5a1d9d31. 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/GBRKQ2158357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2dccece854932c8c41ae9eeefac274a949542b3372d52f418ef57a4024e011. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBRKQ2132713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d0aeab034298759aa3b3bce0f5ad961a443deed0551d73d85927d273b85b50. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXX8F2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c2c1e34c7a32b6d81496698111f27f03f84d87c9684fdcd0469f0222953ab6. 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/GBRKQ2104647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cf71c416f29ce9a2c13db912cefd96902987a91e62c5ee1afe0b6b2d683297. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USLZJ2180610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b1d8373d528fbe2da0e1c733aec739b78227d87ef4b33c6117295e893483f6. 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/USLZJ2122048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab17f0fd6a05e51983aa33ef65329a12cf56596212d6b055d6ef43bf548f2df. 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/QZ5FN2123444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadfefccce21ef2256bfeb5c8aee1781635dc920e0beff535342e30717dec5a3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5FN2111781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7059a380592842af0477cbccab9c7790564c646c4e9f2b72099617683a1d152. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBRKQ2047149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4cc52a0174bf908880d4aa424e8c314a351e63c2271f4e3adac3f960402984. 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/GBRKQ2047124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59e437a19c57adb8d5951de0b5497c926e384ab51d8f6c4eb5f2567e252cc7e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXX8F2000002.