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 0xdcd574064a539272f22fd51dc046296f8b8d23a9cbccaa77e83e8df82c81417d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f373393d-ad89-4bc8-8367-a6954006eaaa.json and https://artists.proofprofile.net/proofs/artist/f373393d-ad89-4bc8-8367-a6954006eaaa.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 0x058b8a6ee1ea7b1d4d6a90909fd9aa92ae3303a4b03aa8e8617cfa2c47442006. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITA642100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055004a799722ab75686185e088cf672191d8b268654965a13dbac938beea23d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ITA642100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a9af6e88379a5fe41db541a72112224aba58c85da617ec8a0e9688c2d4daaa. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/ITA642100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191cf484febf2bf2fa2dd4759e5bcb89b093e20b765abfa50d678d93bc770e4d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:20Z), 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/ITA642100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f3f73bb90433fef7adf1fc843e71326c99a5af2a3aa55ff5e1a44b5e23f820. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/ITA642200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac65f1bc535c78aa32c64ce91503f9ba8d0e625ce2c7c360679e2416c67840d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITA642200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da7d299952d38988ae7f43e129d37e72fab8b849ba2553e7f363fd2b352e5f0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:44:13Z), 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/ITA642200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccb2b95a800bbffdd9e2880567362efecb9a6a223ba75c637555420879e77f7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITQ1M2300779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5aee04c633b9920f5aeeff9ad85304dc1b118789cd9a646fe3cd43969fbb3d. 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/ITFR82110123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cad1ac376472ef4f3a7bfc0f927dc27572b20926fabc936946fb2c10591b3f5. 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/ITFR82110126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1decc3507dd200134ea1665da0717bb5d1a06a6a94e8e790d7cfdbfcb6c69. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IT7SU2210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4101fab9aa337c714a6950f381eceeccf8c7cae0a149e6190935827a217ce697. 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/ITA642000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357d5af4043cef8bdc8db5be33874906eca07ac1e2cb85e73e1555cea7469536. 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/ITA642100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846ab6f678a17bae12f163c3490fc4372a8b7a26f4041b2b4bb5c46246325857. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITA642100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1decc3507dd200134ea1665da0717bb5d1a06a6a94e8e790d7cfdbfcb6c69. 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/IT7SU2210501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1395e79564edfb53d769dc3c56a99fb404c95f557a065559d166e2a3d2902e2a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/IT7SU2110107.
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 0xec3b320a18827816f3e74a982dc97faf22249e4c69dd29c16a114f3cd7bcf91c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/IT7SU2410014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f24731fa64f78b5a7d04948edc972cdd349de94e4904b6b0487b7e6fb323908. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITA642000069.