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 0x326f23a0757ccc9b1ba39a00b015c5d18b5da4f8cf0aaeae44de1d16395832be. 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/e84bb8ca-7103-4955-bbc6-9bdad1e6469b.json and https://artists.proofprofile.net/proofs/artist/e84bb8ca-7103-4955-bbc6-9bdad1e6469b.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 0xbbe978f54ccf68e3e2d8f157b8621d2644033bb215d9702e5ba6e13f7f887ceb. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZWFQ2446787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379bd957f60845cbb4d2837e89bde7430ef47670d66bc86277e43fabeaf3e734. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFQ2446788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c9878c04bd52ebdbe218208968b6e966e631115ad09b815e984ba138371745. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFW2489861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de62469b1de98608e4f59bae733f80e690d02d4b84c002379f5bdd5e6b551a5. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFW2489864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc168d2faa03127e423926d8a19874d0e388de7af834f4c6ec46b227b49c19f58. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTB42597031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa433512e0ce915deb82cec09383affea15895cd4d1987ad41af295b70be118b1. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB42597032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f7d17d1484fb834b76f498a46227ef2675021a3ae6268b28400623f759e357. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTBD2536283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04e7a732fcc4b1a3fc807f7cf74770b6cef9f9571ee4fcbf2c4de71be4fa93e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBD2536284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7419685fca20f4168ed35e7e4e08b8f1c6548a049f6da9c30dcff085b7cf5bc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFT2508811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124e1d14252aa8d31bcd47102f83318571afcfe1a4341542f2aaf6f388c5079f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:15:01Z), 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/QZWFU2509062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d73e5b21de9c505d13cb43aee24f9a658672351cac0768bca9329c14d8e1a8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:47Z), 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/QZWFU2509063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb4631920ace8c5be4327b4cbfee5365b0ff2828bf86c205afce9e492d4074d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFU2509064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0ed9f0aa4fc71f59720380778a53d6efade382266040796b1fd44757ccffe7. 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/QZWFU2509065.