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 0x3c1476c3387e9c84465f07a0a2874e83d9af6b19d77194d1eab1e7b8938b4361. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f05c9b60-68de-4f79-91d2-7f6eefa96f09.json and https://artists.proofprofile.net/proofs/artist/f05c9b60-68de-4f79-91d2-7f6eefa96f09.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 0xe60f649f879e3de5e75c45dbc5477894fe6fa06a0d418b16553d59f26ae5feb6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:04Z), 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/UK6JQ1600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1012f41fa5a4596a9b09a7aa730e69857dfc726c514c22e59e9f08e1bad9cfdf. 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/GBGCA1700305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa0f4b22ff5eab051db3825881c6c824c2fc71d75b172a761e78dd93c0bd218. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBGCA1800481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3c72a0b23eaecc772f1c9f7eb48a40670c654d5fbe6c8b4a642f1e19820008. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:23Z), 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/TCADZ1888643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44638fc863b9d2ca430a090a01d5298632dd2a5c99eb8e6d955f2484cd0d024f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:33Z), 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/GBGCA1900266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ecbdf0ad02d310d935471531c817eccbfb9cd3957f0d313ce7b74f69d684fd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB23J2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411ccadb6991fb140b526ec4c5c980d496e737c0687fd9b1d63ee8ade3632e95. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:19:14Z), 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/GB23J2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b8949913a99d7a2dd3c1f17728f9383e9482908989729ca52732866aacd79. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB23J2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f347e89ff79fa3be964b1b424e5086a154f8c704f4fae8b6990d9027ff44fc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB23J2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7c4b745eb09d1f7b90ce73fd4bb770905b5f6b19734dc4e55b096d79ea4309. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/UK6JQ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488e269cfcab7b532b7717d9d050b3105702c5701d3e1c98980806a6e97e3cbf. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZDA72468049.