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 0xcdd79f5487fa67621f7009bf637fac9d37ee8b573dc035df76f91822916c33c2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7459f708-e546-40cb-a2d9-4b92615f8e4f.json and https://artists.proofprofile.net/proofs/artist/7459f708-e546-40cb-a2d9-4b92615f8e4f.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 0x1e4f7eb9029b9949b675331d077ca0676ee5bd6529cfeb630668c4742c097b9a. 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/DGA062038822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2aafb4c3f1260698f4277834556437a77da3c4685adf91d002b2b23d86810fa. 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/DGA062036243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d2bbb22b931a83d35b4dc784905834decc1a2e0e1e7b8967ab4722e92486c9. 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/FRX872159127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da86576535285e2dac72d85b2632afdb459c315af8333b83a8bc834f14ca324. 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/FRX872159128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69996cdebf70f008a550ff37f5f6f42fe1703945160cf31aa45c9d0a967f60ed. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:49:20Z), 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/FRX872159133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538c67ae71a9558dfb81cd6a6b2cd9960faffb11b62cd2230fd0fee034cb3cf7. 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/RUA1D2214421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496f8465d1b6ddb883583a3b0413b6e13bf128ec083793ded1bd67ecfddf8eeb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1D2264440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d5661decf2153d43dd7ba81dfe98d7024bd35bc0d04ce26fcb96cd97405c95. 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/RUA1D2295191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4bf89af67604d1df22d2c276da4d60d52efaea174200c219a20696bc4d2542. 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/RUA1D2359528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407a04890f8f99e51f89bfe25bb366c88dfd5e56f80575dc7a909a5760d01d95. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/RUAGT2355755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf9e9d21a60227b9df5531f7413a2c8ce4442ac229475b498e54e4e7b968d2d. 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/RUAGT2354190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0069fda7f92a1dade06f5a19eb9a69e6b6cfe95f3dff3e16068ee70e45450a6f. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/RUA1D2413176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dfef8929141b78b04d584732e960ecfddb91abeee7730203f225589453414b. 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/RUA1D2474626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489d361de7bb85cdd02da4dcb6332736c67cbc968250b42a7fa57314122a204a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/RUAGT2407702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80344eaa683ee25f7626df0d1bfca2c18cfe9264b337147946d4bf8a976285. 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/RUAGT2449006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a2504cc189dbfcc35109b51870b8c947144f5860314521650b787330789d87. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/RUAH62420673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042952d97bc512a902b2e040bdc96757fbc1fef24d60705adb7c04a97f1e9915. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/RUA1D2516193.