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 0xa0f5383040390c31c800e5e6683f497712ab50870265389ce1878ff161eb1823. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80431851-c0a4-4aa8-9772-72cae1193768.json and https://artists.proofprofile.net/proofs/artist/80431851-c0a4-4aa8-9772-72cae1193768.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 0x9a24b9adf1e0c0a2df158b46ee63c8644b09c329869da328184138788b15d988. 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/QZES62422518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd28e1517cce6fb7ef81ec123259cadc8a7a34bda366cd8313aab4a333a3b1a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZES62422519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52eb44c25746f94d50dd42c01b669f929596f1669816414cfce58a5ecbe6a802. 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/QZES62422520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430843ead32a45fa451b4cdfd8c386ebe334a3e69c668110bfc84cbd3c3a790a. 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/QZES62422521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e214347e62b8feda0a780a89c228af17ad3a25cb806998d1c2889cbb990012. 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/QZES62422522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb069cf9c60ffc594418e11df14809561d83904d17121771c0e0c03a960ec39. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZES62422523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faed93fe9c8fad42d3c075f0915541abca7f6ec14e1f59318afe2901caf174c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZES62422524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589baf1b18dea64a829a271545e0963c19a7196324ad452efcd7b9c24529d533. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZES62422525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e15d648cfab7089a608139c12899337a6ad16e5d93390aa100207845c4a7a1e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZES62422526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacae9712f2bbe546a23c3291eb834455bd8756ee8e88575678f28e1960e56b0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZES62422527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a44c60f395711eb448e2d2186309e4a3707d714d11aa41765e7b4a7a20d6d03. 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/QZPLR2357143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f3794acc8514282e674bf55ae3b4e23effe374a86859a84f7d7a790dfdb66f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZPLR2357134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed553200344cc6d800e9ce15e9bc6b677e90c29d5f075d2c23bbff1821b779e. 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/QZPLR2357138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97741c23f1cff7959b1a54fa987bc6f57711bf42daff29f6114914ae5a0d1fbe. 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/QZFZ22433374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aef853d40b1e599caa331c86b792d895dc658641360ba81a9ab2c4654c3732. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZTB82384197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318d8457da5c521ca026b8ef46674c247898c2042636504f4e95d0eb00ea4484. 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/QZK6N2397503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec5bb94cca829a9ccac9861d12d8035819794c524b06d53f199c4c30ea5200c. 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/QZDA52319566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00af4cbdfaf08775b7de25a6ab1647ca36101f064e2266534dcb7bed5047e4d. 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/FRR642401059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d1f5ebdcd34567f1396b1c309a0c13324e4932d958ce8025afede97496cfca. 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/FRR642401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d0f4beeaee1cdce3745d40461efa5328820a50ca259066c8509a9ec9210167. 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/FRR642400506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107ae6ef2fcc30ffb6745bfc10e1c4b99a6165de6716595cfc752138d543f587. 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/FRR642401503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597b9542565ede6645257d3e540a7cb4293f343973530d75f2bd54db88196c87. 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/FRR642401061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d1f5ebdcd34567f1396b1c309a0c13324e4932d958ce8025afede97496cfca. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRR642401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c59b3f55e084109064a429b3344d2f4f44a2a917a2072bd98c867953d25b62f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRR642401505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00af4cbdfaf08775b7de25a6ab1647ca36101f064e2266534dcb7bed5047e4d. 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/FRR642401059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0358318aec38b21cfde2d802a081e31861e88ca58cbe070458f20da0c8aeb211. 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/FRR642401509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6428007ad10d4573b0fc048304bba7c1d700dab672bbb4a01e1238a742c73cf9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRR642401510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eae1a8fec78d6f4fda0f0ae07f3f0603b1e34b752c2685412f2909f9a908447. 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/FRR642400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c59ab2d73877ac531a5acd7470c310865ddb5235f717bb99fb8228d9191fc57. 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/QZWFH2361824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7ae41cc03e658c7a91ca2f493616be5450879fd0812ef26d67c22ea9eab591. 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/QZWFH2361825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27530d30f97e0d006452bc44c55a2b639a3d935e3bef28776c22d3362169eaec. 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/QZWFH2361826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2afff04ce36425259697cce3bfe0fcdce2970e511d37cc9b875bc844769439. 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/QZWFH2361827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189fca37354ffe1f47b13b90b3182e614257bcd099853bc163837183f1f2491d. 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/QZWFH2361828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd370140050770ce33c5ac64d15351323dce1ccc69735462fc05fa01d5cc4aa2. 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/QZWFH2361829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa5e750ee728f5a94562e4cd6b9abb4057b746d45ec527ee7afec14d7495c0a. 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/QZWFH2361830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c6ef208fd1f40b5faea9ccd086a41251dff41eba1063c770c82522b740696e. 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/FRR642300999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b096c9ab3712f9b8b7225e2c5f6edabdf49ab0a111144c2a71e12bd49f4c59. 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/FRR642301004.