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 0x988e35057ee14f411ec44fe7d5668e09f2bb6f296d99a823d71ebf0a4dbf18a1. 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/4b78f218-da4a-4d56-85c6-aa3fdcc2f5d2.json and https://artists.proofprofile.net/proofs/artist/4b78f218-da4a-4d56-85c6-aa3fdcc2f5d2.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 0x21825bae97242b36aebb8d9a99a1d1c68d9a752182d139875a89509c10c1ff3c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NLF711905000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1d3e5338f875603252555e550664bf34a0e30091216ef2889fbb6b4e979db9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLF712002005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4cce5c5cfc37aa78264ca465f38d14a7fbb447a8941287e983a829dd3b97b1. 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/NLF712004152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687e948b23a6d1f55d37c274d303e693665204614d0db4725b7af854c347bb1. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/NLF712010061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21825bae97242b36aebb8d9a99a1d1c68d9a752182d139875a89509c10c1ff3c. 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/NLF711905000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07a80c3d82da13e320e8bc92ad119dc8962dfb1b34c320fb3e216b07cbd7741. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLF711809024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd72b6662bf9244d9d2e2c2e0daa5ccc4bfd3c8a1cb6db6e384334c7aa3284b. 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/NLF711910169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63beb4ed68bb1ff9561d5e122762771a20019ca44e715b9c543ffc6f9de8397. Chain 2 (Bitcoin): anchored in block 957029 (2026-07-07T11:17:55Z), 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/NLF711900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49599473021e7c109d79e473eb36fbc577b85b7960c30c69fc29121cc2faa8ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLF712010058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72e50e28c21bdd110b7c5bf2d50f201c61ad2dd1f5ab12d4907d836519a4746. 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/NLF712010059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63beb4ed68bb1ff9561d5e122762771a20019ca44e715b9c543ffc6f9de8397. 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/NLF711900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd72b6662bf9244d9d2e2c2e0daa5ccc4bfd3c8a1cb6db6e384334c7aa3284b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLF711910169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21825bae97242b36aebb8d9a99a1d1c68d9a752182d139875a89509c10c1ff3c. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/NLF711905000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687e948b23a6d1f55d37c274d303e693665204614d0db4725b7af854c347bb1. 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/NLF712010061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a43c4a91beee1799397e9bfb3ab2fac61f1ec042e6bd89209dc5f8307a4471. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLF712010062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3584da15b2cb46be3b94307f2781294330ac9e68ffef40a8ab4a3cf5de6a574. 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/NLF712010063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86db3c34157f2409851453dfd80a1525cd240101fc5a247c1556ffa1a8e4530. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:50:50Z), 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/NLF712103231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5551c1748a4e3a340bf286556b5c9aa81704d92f9319b13d023606f5484e028a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLF711802595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07a80c3d82da13e320e8bc92ad119dc8962dfb1b34c320fb3e216b07cbd7741. 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/NLF711809024.