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 0x46e991bea621c441baa517e43d1217587592d4959a0e16d4a97284585da0abe8. 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/ac7bf803-536f-4661-8859-34c3fff06573.json and https://artists.proofprofile.net/proofs/artist/ac7bf803-536f-4661-8859-34c3fff06573.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 0x78a262f8aa27f3f3a0353992dac86c2c0c2f2e5fb076b27785c64732a9f42564. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZLL92242952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97727c1e297f49f95d1f6240234883b7f658800adcd335e411b1b97ae7ccca05. 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/QZLL92242953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaca69c9d67633f5609c415e59881b5a392e3edfbd15d4460d5988c40559e165. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:53:59Z), 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/QZLL92242957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb45cc1184604adcdd9e6161fb3382b6e8245f9cf59c057d63b5a3f80924b21. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZNMZ2212511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914b9dd775322a6b2d3ad26f590b7c33412dc1047ef0f6899aab46a68c0e17be. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNB82390123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d26db87207a464ef3c5a58cf5fed56b40d1576c06fb91f52d2d57738679f5. 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/QZNMU2341243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ceea96c545a4774f73216200e11c2d3c81a1462b7c07a2508403474e51ef4a. 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/QZNMU2341244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca4beba188d91f454bf7cb55cf54af95caf779acf7c8138fb6ed10d3aa5f1a8. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZNMW2396379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf95ec6d130dd58c54e4ff048d938bf2f6dfc1c51985c50fa30e223638f570ab. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNMZ2376505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131e162c0db2af49d5e9978bb7e6f8f0c5e7c5d1cae94487153e952670e3d2cd. 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/QZL382485591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa8e538a71e3c6c603e91b8b213ee3d810a1596481a5618b6f9b69e29a61f4d. 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/QZL382485593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61094251872b7e5b0076b2ff5a1bc6cf8979c525706eb119a6599d7358883692. 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/QZL382485596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a3e940db923597f2f9ffc3a81a2e65ee47b4255e0a05961f06d6890921c93f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:27:05Z), 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/QZLL92462652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0c34891833753b896ff8685c12fe39d4636d69df38f2b407cfa39dcb6e5b87. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZLL92481545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3258ecfaaabcfc31d51533355a11ae3c778f755a57ba5f8ebc54f5cca734a1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNMT2477940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ab3132f311eed7f4e5182ca36d8b6b94c5987471629b32514ec4863634df12. 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/QZNMW2530743.