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 0xe9b8293d61152c9c8f1fc2c4f762964b30c33f7d2ae0bf745aa4e658ad539f61. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e18889d-2052-42dc-a010-77acf995ae72.json and https://artists.proofprofile.net/proofs/artist/2e18889d-2052-42dc-a010-77acf995ae72.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 0x8bc7f14411bdb292a49247355b466b0aecd8a147e1feab599bbef374eec1e81a. 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/SEYOK2010339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614b736afae80a0b408fcb095ed5dd041edf783fdb00b382cf4b8971056466db. 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/SEYOK2010340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553fe3159d4dbe6e73b88746590cf0d44346f23eef72936f7bb4bbe162daff64. 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/SEYOK2010341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8c3fc8a3865d8ecce27cfc48accebb8c9e797ab6a4fe08c9b98467aad5d1cf. 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/SEYOK2010342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d92f5316bf3aa86d851bf074fc81ece3b72533413fb69016811a9034c8c4ce. 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/SEYOK2010343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92651d83ab4b362f5ed2c37014adc6d2ce54efa4e9482e5cf58b8d8c05f5aec. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/SEYOK2010344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fe9278190446357270a6261ede33b6916e72add26dcd300e001e0b41ba0e61. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SEYOK2010345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b1b56dcdcb70abe82d1569376382b291f84c4c8b38d525671a14c9602829d8. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/SEYOK2010346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1ef0f7a7ddf11927a489162675aefa9905f8f71b6571374659a8a5eca00fdd. 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/SEYOK2010347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1c0f8da4f792d0b9cb22530a9752ec0190fdcbc27b6ae95a239ccb7caa848a. 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/SEYOK2010348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23254751f146ee505914a5b4b18000b99fde5509c7a22cd82b115e8b5a55e471. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/SEYOK2010349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fef0984d25baaaa6327ab9183d1bb5a38778812ca30637830412119a36a9c0. 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/QZNWX2365433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a8092264a55203404e93b5aab3b6167f6d12e31a9413b70315d6941f1440fb. 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/QZNWX2365434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eacb8ed22dbcfed0be883de195628f83c7c928cb24d900a446eef0af70c4d0. 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/QZNWX2365435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b5282e40902468d0d27882f474eecbc959f1ca9f1b89552d8bbd03b20c9506. 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/QZNWX2365436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7d8e621f57f1b97613f9a65976dbaee22677139bde3c567dfd5c8118df28c3. 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/QZNWX2365437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a8092264a55203404e93b5aab3b6167f6d12e31a9413b70315d6941f1440fb. 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/QZNWX2365434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff844ab7a4e89b24d0459d1d61c67f57fd7f943643dc933072ffca729fc5845e. 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/QZFYW2131994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391c30893fa4d1abd777fa9b9fca43147f6124a5a10aaed1096f23b79258b316. 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/QZFYW2131995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451c42dec336f743079f34ae3ec05f62b93d4decb7294fe46bf219806c0573af. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZFYW2131996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2150de69ad074e810208ab4a59e827ae23e58f87b38d1f96c1cf7188a5de7a10. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZFYW2131997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33793626599a9cb321391cc65226f5c366618ca732e7c090c21aaa90ff8cc4eb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFYW2131998.