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 0x384993332b46f8285cbaef692847e20a037a3a9e565534b745a9e607cd0cabe3. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1299fe1-603b-4021-974f-27fc4a2def9f.json and https://artists.proofprofile.net/proofs/artist/f1299fe1-603b-4021-974f-27fc4a2def9f.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 0xf966bfa0e9112c7f28cc46d80bacf33379f11475100ead002ec5ef93e41dcf9f. 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/GX4R52234041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbffb5eca4ba4a782800d43d2c3e3029b6068188fdef60073498db314e80036. 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/GX4R52234042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218cf9fcc9877be98785d1da1e48a02ff8fb82ac4b0f33f434d5ab74bc834f45. 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/GX4R52234043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddbec9d14ca7367d1ac08920fc531ce2a27a3ab4c611659aba91886722861d8. 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/GX4R52234044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07257bafc853addb581aa2cac8e92c189b1a12339bedaa079a1aca605f0be4a. 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/GX4R52234045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbe200da741e139c0c87701ba65e750fb4e8e8ecb7929a04fff0aec98f05809. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GX4R52234046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94873891807e83d7f9af44771976e6c68794203069f7085d3279392165db93c. 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/GBSMU5571161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1245c6d1d650725505ce4ed372b129bbb0bb8967aa9b469ae9e0958cf3bfb309. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU5571165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256415412073c0326e0e720edf2be0128ab61055e43d286ed77846b70c4215b3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBSMU5571162.
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 0x9022ca8852c608ddce1d887bd76e51fe16a509f305340d3a28b8cc2e909010a6. 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/GBSMU5571163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d88722096f9a2b399c52ea4e1dfed61efbb7affedd65d866a433bc12742e108. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBSMU5571164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc44bb8ff03e7c6e5ad7e8a24e20f744cd97ab72434fe31f112f75e167aebde4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU2639476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0918b615c6395f409ee5c38aff4a3398f9fef400e88b9c3805f996564e4d1d1c. 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/GBSMU2639477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9427c6797e9dd8686a81e2c37221e3f2507a6060f00a0f291f852e01d3f6f18. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU2639478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a27830d548efe99e5b250b261669ec167c2d8e1342ee1e5b6a76a2543065a6. 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/GBSMU2639479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf69dda9f9524b3300a853ff378a89b52872f3d84fe5b6ec19d3908842bf88. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:24:31Z), 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/GBSMU2639480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b64b6b2d89328993fe38ceb5a25c7e51515c15170358decf05ae30933686e7c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU2639482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cef28cbaf815f38622a656f16f6c3d12844cf658a6add17b1b6a338b4395c6. 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/GBSMU2639483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd1ac689171ac6d681deb423536fb6ba23eb1875cc97d2e10122223205308a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSMU2639485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa602a95c07541102e448afc3ff9a6441968f17e26bdf2cdacbcc92b013218979. 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/GBSMU2649475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3850d393e7a73ad8fc2d1ff0a4f608473f4090b3056c4a720d43609816a7e7dc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBSMU2639481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e03f43368be0cdb78366dc165c233f167f55fcfbe2ffce8d8984c9e338cfda. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBSMU2639484.