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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71e4cdc581a8a383aae39b7beb5ed22887c9f5105a0efa058c6f446878ec2cf. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c07d2be-5202-46e5-ae27-8a6acdb00fb9.json and https://artists.proofprofile.net/proofs/artist/9c07d2be-5202-46e5-ae27-8a6acdb00fb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
exaggerated experiences, part one of two.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cb71d6afdec6aea4c4e3149ee5eda3defad8f796c082b0bac81f365931ec5c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CA5KR2199524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b22685d75132f5f1a5652322e45a19dcb6870385bf7b3a1fadc5d4cfd4a0d7. 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/CA5KR0004290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1678ad0cbc57b0488328ea7d52564f031fbd01a5825cae795db11dcb08ddb3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CA5KR0014214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb0ae35f5e13b0550ff50e09009749cf5b882ddf1c6119e1840eab44604716e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWS2066950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fcf7bf8d527137280f141f677188504ac1b00d2c02c89ec78fb3548166927b. 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/CA5KR0014215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b22685d75132f5f1a5652322e45a19dcb6870385bf7b3a1fadc5d4cfd4a0d7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR0004290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc391ad512c0df8aec2662cab84481c472b5ad025c9ff1b4579b6a394c9fcc73. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CA5KR0014216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf249eb5d55384016133f92edc85f0b5eb1fa900d05abba205146b7cf720a86ba. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZVG82302803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bb81d2adf12902b23c3be07e3583008e3b740dea99a7a6f44d0a8096dea981. 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/QZVG82302804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689af0a335e17812533d44046b0fc1aab463a54364a2e1e21fcfb9647c910e85. 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/QZVG82302805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4093267fd0c39acfc6d72023c25a3fcc851ef068ef5e1211062c401504e7fd1c. 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/QZVG82302802.