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 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
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b59022f5b0d57554c4d2f7e5318577fe01f16f0f25904d0b60ead840b2123e. 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/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 0x08b26726809a731483874f37b144b8b4f59ae70c82e791fc1a98ae45790f644a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZTV32371768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208db2b2bec3dde3efa988b4a2c86830804ed1eaf7b95f0f7c6787b391ba948d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLZJ2368958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5870af15f63844a64ee7a7c5a501c7f153785b902e323f20ba1aa60b5a1d9d31. 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/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 0x7e727501380844222cb4389778c77259e3ae2a873847ec74e08556652c256e50. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USLZJ2194115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cf71c416f29ce9a2c13db912cefd96902987a91e62c5ee1afe0b6b2d683297. 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/USLZJ2180610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f8422d6014efe599bb6997d807983fd29c2a7b5eb2099b39a498fbf22328e4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USLZJ2149461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc464b33531ce7db74aa509b926f2d7bf6b4428103180aa5295c03d10dc347443. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USLZJ2149487.
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 0x7a22f5844d55df01a9b1a4f4cf8935f880801dbd90d0b8f0d5677caae5382599. 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/QZ5FN2131340.
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 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/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 0x94972271875ed82eeb250dba8a22a1441e0f85676565f2c21563aeecc0754b35. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GBRKQ2038115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4845a905ffe7806ed774c7e50124f90def0800882ad1723047d63f04c1e9bc. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBRKQ2022968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07524bab6d3afbb1c01583bab04dc7c7fb023276befcfa0c0ea2bffdf925bd6b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBRKQ2011476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59e437a19c57adb8d5951de0b5497c926e384ab51d8f6c4eb5f2567e252cc7e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXX8F2000002.