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 0x5786eb5e0bb88a60c8b003ce0ac3a01b52b20bb4282428ace56cb92650e19d28. 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/c5945a64-6ab2-4d1c-baf4-3aa021639a63.json and https://artists.proofprofile.net/proofs/artist/c5945a64-6ab2-4d1c-baf4-3aa021639a63.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 0x2097094cdc504137c94e121e0953fa5cf0c5607aa9b8be9cf9f7983356035e42. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZGLS2230244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ee3479d0facf67f4a31307dc87a248173625f7ccd2fabde40e3dc5a908e97d. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/BXCND2203290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9cc93782951d8992363cbb118910927b862695d6570ae75e663151ac304f51. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BXCND2203293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417b8d75df9dd11c47c681f493e71b277db6fe4621e968240f8ddd0dfc15ac28. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/BXCND2203297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd3a7230246576b51cba99094ab9dccf8074214b196d54cf19309e0c3f5b645. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BXCND2203306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a8080b8678f9d61ae52c5088f9a2aca7b3a277113065fbb4720120a4ef1134. 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/BXCND2203308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9005a7b0ab220be5fa175e0f577e41531fc8ea6fb4db2e9cb5fcacc01317d38d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BXCND2203550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf46ab6a0adde2d28c81d8ea62993ff2555fa00484ee892bf1502ecb6a625f3d. 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/BXCND2203552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4968e1e1ef3f44d0429ece7f32349b2c522fe62cfa572d8c2a076b8fa82940ad. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BXCND2203556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033a1a11381ef595b24aaba5e886d82e0ee15eab2d1ed1cefdeefd699dee04c7. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/BXCND2203557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4295b7f22c024a9c9b9adcaade9ac1b1b30c5b55e30f5df6e5304152118a79a1. 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/BXCND2203559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0380201adc2da251ce9ca137886de3f2dd53f55db2bb3e287cf55a91722d213d. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/BXCND2203566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9187d95d733542991b298e8c8eec17782669c61179326f6bca199b78421e90d8. 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/BXCND2203567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb75fe727855d069fbf37e22807a1167e715f57d9d59cc6346e471bc03c55fd. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BXCND2300189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1884375c8bea0289227d29255e1afc2e37e54a8976bf1e978b23b9f7a071aa24. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BXCND2300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf312d4850e16672f0f79ad6a8301c77cfab42251240254610b4ee2d8ce7a6c7b. 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/BXCND2300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbde837c4087b6ff52ba5c28a38e58e8366298583a3b76870095cc0bcb8fdfd. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/BXCND2300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382ced2ff25a88f6cf9a6db892e4c6a56b9af5d5f9a86cd094779b0ef3bd9270. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/BXCND2300561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95ef90594062f868d3994672ef0a4710002811322f4770f93eeb90cd33cd2ee. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BXCND2300798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc685460893db559139b7bdfec074f9176ead345709788c7da8e4c4f844a8530b. 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/BXCND2300799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2920c6126703d07a1f610cadb45344715e8e609eb5da8eca2f4a7f0641bdaf99. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BXCND2300800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ed2e1fdf35cf1752bd3c138d3c388857ad1a6dce8b2ce0662313029a4bae04. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/BXCND2300801.