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 0xc01d5831b4097ef948800cf664f97579dd432ac2d4ddff85be019d33cdb1c1bc. 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/15c984b9-0351-47cf-a054-9bdc031cf53b.json and https://artists.proofprofile.net/proofs/artist/15c984b9-0351-47cf-a054-9bdc031cf53b.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 0x764cd2c9a9485f1dbfbdd6515dc12a9042a6f07929029b50ed50235f23f030a1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKSAI2300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c00daeb2bc1a1bd52b4a378dbdf0eb6c548f110c269065a9c37d89a54b9b2a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKSAI2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713b660b64f078c140af1389181bd93c84314ec6a324d7521044074b1c40fbe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZW9L2399894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa2af3201aeb4a92b6426774e85b8b9105b81673f79f272e2d87a6eb4668047. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKSAI2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce31476cf3b2bdba8e50e2fcaaa965313d59d01b73257ea9c43a8ba30000b6f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK1P72400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f8ca05ad3fe56335169501c750befea87765f2d755aeeb99deada9df9e49c9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BKSAI2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d193eda55617818e9d5ac63ed0c0d132c36d0230c0292dcf568ef0a7a3f5178. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKELR2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d67c1a1cb0604d882887631bfc0bdf3bd490e0701d0b63e97b5525688e761c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJZ2219321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cce34c20263c620ffa0719da79e6a5b5efce569a1a4de7c989a8d27ffb5a15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCZ3X2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45df9d959807805ece20ef932008d1071f597c74d539b9bd432c1c3517f51e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK1P72400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac05c4495f65b99dc21a245c435055a5611f3a510f427f62d80c9b04878fdd5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK1P72400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfec51809bf10c3eb8e509eba8e8aa6c226f48f0509028b64141e54c31d903b5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK1P72400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218d403f45904eefa7d71d9c82337652288adb4eb328a825925c7095223e0696. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKTKU2500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056fc7bdbc00ec3e8d654de2ab71224c87f36b411d86eca083f6c789151a8adf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKTKU2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f19bbdd563fd082c272225ef5887e014ade3e12993629bac353b593f32e0aa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKTKU2500233.