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 0x21420de0a710f46524594e7fd89b60b3a8b0832024a4c074540cb00ecf060939. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/017da048-7864-4b82-8f14-b4bf5ae33f95.json and https://artists.proofprofile.net/proofs/artist/017da048-7864-4b82-8f14-b4bf5ae33f95.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 0x4873f09725dc17fad6c91073723d82ed2e3d2bde85559264be6b4d848eae3aaa. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/CH6541813761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ad10a768e009520ac22765273011597b56f11c9bda5ae5534e15be28f52cbc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IT8GM1700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51764bd04d38187998a4f627f7a00e8739e848dc734be89fc1e0487c8b44010c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/IT8GM1700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a0bbc9e588d6d7b285875aa9e0f68fa2ed0d23c4f30a0a3ee99464a494d002. 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/IT8GM1700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907aa1a1e682e81b2277f6b1cfe0fc949b012f416dba847e14f5a6e04eb070ef. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/IT8GM1700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a29909b67c2698e8ebc6b37fe264b99f5b19b6c198063926cc363a17505b02. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IT8GM1700049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac6ac0c78bf2a47a4cdf326e47527882164e63a30896035240603517e13e5d6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IT8GM1700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1c97ebd9c5327baff091aaacc6d5c042095f20d26fd1fccc770c269570a6ef. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH6542250575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f42d6230a3009d6d3e0d0c1295a1f0eae0fb67c0383f21fdadef0b9f591bac. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/CH6542439713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3009803f5c00cea08620132571272c13dbb8bf96808ab00955ea0eba1f2a7d06. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:55:07Z), 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/CH6542457200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f46ac1ccc133ad9e9fbdbffda004e2d0c56efa1283811f14695220181afd155. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CH6542514511.