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 0x365cc66661d057fcde870d74c7b343d958b3eaeb5ce34aededd23386fbf34819. Chain 2 (Bitcoin): anchored in block 953933 (2026-06-16T11:13:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fae741e-f285-4d75-8570-90a8c3b285c8.json and https://artists.proofprofile.net/proofs/artist/1fae741e-f285-4d75-8570-90a8c3b285c8.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 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 0xf21af730bd8272cdde4c3f0995898cbc012458f3d671f9796ed525a26027244d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRIDO2313835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2cc363d1ac98f7844dd101f381268d6d9963a03af6c22b2a39d8b84efe58ca. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRIDO2313836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc18de7a6aecb751cf321b91706d3f0a0f50345c8665e2004ea7e95aaba85e73. 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/FRIDO2313837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c8f11bfd995701a8407325023a2d69cb8b4f075022eaedc0501a19161e3c2e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRIDO2313838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5543fe13f94bf1cb085dd13b69efe1dea8e4ebeae9ef2674e74a63eb7f69766e. 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/FRIDO2313839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3112f9658a8b31d121239d7b36cb44cf36ac05ce02467411b0d261469cbbcb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRIDO2313840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e154547480e89dfeaccb7404f5a26958ddaaed476208299e1688b5e7a4f935c. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FRIDO2313841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b438595f2a90c1dd6b624846689b87d5694007923d6f76c53f6118cf8509aa3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRIDO2313842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36503016031131d94b206a9fd34536cc589e7ee9f8c681c95b6073b1bd842630. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRIDO2313843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a355ef6bede6afca48485fd2f9c66f21573b41151f344b844e41ef5d30c0154. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRIDO2313844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad3a526bb44e3dfca79cd4b6a77820263e9f96b335aed232c700ab261513259. 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/FRIDO2313845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05007298987ba546052e38c1444c225276e1000180be19959c30ecf273f08019. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FRIDO2411310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b23ef2d98639a976bbf6e36f97efed1ff0f90a40f8638305e7db61ab4d75ac. 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/FRIDO2411311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6247b0e073a3ac71113410f6ff8b385aa4a648008f1552ad9162df421c386c89. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRIDO2411312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a143d802895ee93868531e5281f2ed4012c180598df3c2c126f73bbe0983d0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRIDO2411314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fd9f123267577f7acfe45b604b2de5ba30e60e86902dda250bb37fabe9e511. 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/TCAFA2019887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87c86884e90de2b0c67e37e043c00e28de204bf2b5e80c6870054373464ea69. 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/TCAFA2020316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aae06ee192cdfa1442fa79440e724a80ac467cbbd50990102f000493a28eb0. 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/TCAFB2065004.