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 0x91b44d17dcc48605df8a8070638ae6ffabd34bc9d380bcffb46bd607175b3fbc. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba548e31-bdab-430f-92be-f7161c022c63.json and https://artists.proofprofile.net/proofs/artist/ba548e31-bdab-430f-92be-f7161c022c63.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 0xd3925269f7edfaf970aa1f62a6fc9bf789f522da22e46ad66ea8e8f8b5623aa3. 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/QZWDD2545517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1967ab4bef3f7be3897614c8c1368149c36fc1ffc1532b24361fa6cfc75a2f7a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWDD2545519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc06f003a3ed73f867ee73e64da3eda652530ec498af5eb98952f8b98ae4e56. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWDD2545522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aec9966ee287384b1d2cfcb676038726eda2a50028726cff1aa033850795a6a. 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/QZWDD2545525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac74579c7f0e02f6d341c12e3fde579bb94fe29433b21b0a5263486ab9aeeb2. 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/QZWDD2545526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2b83c7047b05ce0c89adddf015a6ada29b38e4832a1a761349504d7dcdf226. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZWDD2545528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a030d1a30436120b82e7b8de70a124ecf01f19f64ab9dd1ffe5dd60f1b5f8b7. 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/QZWDD2545530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad29c7f0ee02b26da6168b721d44da6953bc86cdaa1f093cd7c79dd5ed383e58. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZWDD2545532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7852b1b5f588f2c3028cffc228cbc595cb44577d51eda421feca9398ca9b6d9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWDD2545535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33669c1afa5c322876878575f4c81541059d49787810bff029f92c90dfb812e5. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZWDD2545536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5ee724bf20d930f33d6db94d380247f31d9032bc42e6c9211d0e8185b2972f. 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/QZWDD2545537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd75bf9d4076908fa83bda8b45597f7939dc46af4c563152a0f4ee1a0464085. 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/QZWDD2545539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e350198582e0013ac42282b9137385d75abcf82057f932a8fd8a96d6355d8d. 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/QZWDD2545540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8b997ee7173d5784cb7d976f88842d42b77bba61f9b8b89dde701bcc222829. 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/QZWDD2545542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6560c7ba6016100e89edad24a26c0db3a8bc4a392f15d578ec28959e7ee7eb9. 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/QZWDD2545543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198f34b221094cb8da6663e80a886b34357dcf94f1085b9d6cf902b8ef589eed. 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/QZWDD2545544.