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 0xefad8152655224c2b0ae9339b46053592076c4d011169312f4ad2255f39de147. 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/687469c0-59c5-49fc-844a-50c47748ecd6.json and https://artists.proofprofile.net/proofs/artist/687469c0-59c5-49fc-844a-50c47748ecd6.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 0x681c6d9782f10e4238e23f7b5c13d8dd35e2f00ed721a9f290394a2e26622721. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:07:45Z), 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/QZRP42182512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534e04ee9d922de72bb9804b996945916e2e09d9150fd0f5fb11795288ea517f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNWU2225629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57c0c2f2ef08b0b924106b6803f0fb86810db6b3b48c644fefea3aa339cfec5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZDA72309049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f056b243c198a10e426d710d50d656418ef65bfcacf79fa0c3d336b9d47e28a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN32323020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e0870a1cacba3c54fd98f9c7a79aed938e4d4f20beccf3542a217ee823eac7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAY2383298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c8d2566c7850fba8f22594284f418fffc15eabafe168a7c174ae347a9c32d8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFH2366903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc2d16bc6524201e50280a896b7c4fae6929fff7125301c66448bdebd2c4be4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFH2366904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb988f660ca70a50769a568b264ba4d20a7285d0615bc97b1c5a40c942bb559. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFH2366905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae36fbc932152634b8c2fefad9d276ec1ab584fc36efbf061bcbf1c7dec9881a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:44:44Z), 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/QZWFH2366906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd177c712fca5773753c65ce7a55eac1c9869c0b5ff845719175f0972ec26d02. 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/QZWFH2366907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a908c8da995638801ed100fc33e07f6f59f498f719da929d6121858c74d16b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6H2397857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e0870a1cacba3c54fd98f9c7a79aed938e4d4f20beccf3542a217ee823eac7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAY2383298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1127165893a4b64d11cbed7feb4c475988b152059ef609688a4fe781d75245e3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN72516431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49041ac059604300e89b51dd79e6fa75e9568d4b37f312906260fcd679f74812. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:19:22Z), 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/QZPLS2534920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2259e81ee642c1ec07b69e7b04aec1af2e42fa16565eb70343b26640c0884c6e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:14Z), 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/QZPLS2534921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26b90b05f5d997d03332ec600b6bea7f4c1d1f00a748335b6730f62fd41c01a. 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/QZPLS2534923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ce0a4e0779ecf17f2aaa0de38a232e60a3c4ac2860afcd5136ae570fe5886f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZPLS2534924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4bf8c5d919f6b8019a1d98d7faa795b78bafc2cce1a69898ad479128198184. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZZ7R2571210.