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 0x376260c9f4764547dd64df579e4fda02dc93fb501e7fa3ca44b3c5ce0951f869. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bf174c1-ac23-49af-b80b-a67e1f5b0586.json and https://artists.proofprofile.net/proofs/artist/1bf174c1-ac23-49af-b80b-a67e1f5b0586.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 0xa05bfc87c030de8dd5645c488c8d41c068a112787b6aec7becb01e059be4f2b5. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:47Z), 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/USMBR2416211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b08871c0f5fb2001e7f9720e79b70d5008fec7cf02b92dd1053f588d1ef64f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USMBR2416212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce78ebf55b5ddb9af6e9f3c85016d0b2c2ebe64722025cd97f6c547b5c5fc4cd. 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/USMBR2416213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3332f662f42536fb5ad9f9c37af9fa70f64911ac520ed88c97f66e3e18f01b8. 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/USMBR2416214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5787d686be0cfbc2c61b1b4df38b45a82134d8dcfc5fc5fb51601691518a8ce. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USMBR2416215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342fedeb48693d23452f603a6879b13c3a3bdf0576262642444bef4878efbee6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USMBR2416216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fea5253e389dbd16e395fa4f3b3522bb82820a11a955d7b322ffd3acb65a68. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USMBR2416217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd596225f8b3c69ca97c939603d66f4cff581c48b1755b93ff84e978b9b070cb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USMBR2416219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683947edba301b8dddfeacf5eb7bbe48d2a91ca4487de5f6debb7a5cf83b8100. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USMBR2416220.