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 0xc05ae4405b9b585ba0b55aeb6db6638828aa9ce61d2a1f558dc707010167c676. 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/31c9bea1-6c74-45bc-8c20-bcf01f052117.json and https://artists.proofprofile.net/proofs/artist/31c9bea1-6c74-45bc-8c20-bcf01f052117.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 0x1c0441e8448a3bc8406c7c92e2f2782142de37c95a5dfba88f1b30526d47d0b9. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZDA72023290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f4708cd89d1d6e70f4dacd558eb9837e7e5b6dd0c2a9d309ef5e9f056c9b17. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDA62023190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd15dc9b110312f5433f8d444bfbec54da7e9660f85b299626e127857798540. 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/QZHN62017912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5454fca3df3da4d69e460257337a640c29de8483d1fcc5560f139c7511f83c2d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN62017913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fc55efb158f409ae7bd462569cde49d5396243fa594174cd03f94a69724da3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZFYZ2201980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02ed7bc2b485808b93de223c86f9e67b2b13db12539413bd5cba878708b34d1. 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/QZFYZ2201981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688295fb96cce0de81785ac1239ff7de9f56176161053e85d39268f7ea5a7c1a. 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/QZMER2216081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611a7364c77f07d0d18e4a98416fd2a139bf55a471a14ecfed1090ddcba69339. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZDA72397901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3abe46554c759bd468a421495c5d4ab13c57a88921bb47502665340f06cc5b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:37:28Z), 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/QZNWY2379827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf4241c25832ad72b4d4074b48661a2165a6a6ca0b8dce506d4da8792b779d8. 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/QZTB32431930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c61431e8c3af63139207657634efc7d7b69a5985ef0bd27a9ff1aa34d7e260. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:05Z), 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/QZDA72591484.