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 0xb1e89c274da928ef23fd8e8a233862b819530ad432e82af415cb8e68f37c86d5. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a21d0c07-06d5-48aa-bdc8-57f2175d2c5f.json and https://artists.proofprofile.net/proofs/artist/a21d0c07-06d5-48aa-bdc8-57f2175d2c5f.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 0x6520abcdac7afbb6a84a980276a10d9b8fa756a505ba7bde00684842b41d03bb. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZK6M2468270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e53b0b9da417ae4e8ce91d50924728cf002f42334d0cb9c57ab85f002f65923. 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/QZK6M2468271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90abfa4fc8484da997cfe280b54c8c566c5e91c4c2bf501991cae42cb23c9240. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:12:52Z), 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/QZK6M2468272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa08db1cd2b7b4b4e95b05a4d7250abfd2eaf949e7ea1ed627b8526893294ab. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZK6M2468273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66b8341b7eade451b2218fd7e1e820e3ad96292f829d7136da006bedf2be9e5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:24:47Z), 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/QZK6M2468274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e860968daa5ad88ed93d608c8b767c40cc9e8d8f0790bcfabe7ab9dde8cb2f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:13Z), 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/QZK6M2468276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa873f67474b1ddb1510acf420222edfb985986f9d62345cc8d7824da0594b1eb. 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/QZK6M2468279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20991fc598ee2749d2830acd650bf38c52f788f1b099f3e99a85b103cc2a45c3. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:06:45Z), 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/QZK6M2468280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ac90db33c48a8a0ac68ff9ab2d1126c05efe9cb7c0bc51496d9ee9010a0d7b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:54:10Z), 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/QZK6M2468281.