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 0x7bfeb05be9e91612db2f36321dae8f867f539e5fa595437b040ea37b7142ab15. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac845ab0-8ec6-4afd-b34e-72526aa73a91.json and https://artists.proofprofile.net/proofs/artist/ac845ab0-8ec6-4afd-b34e-72526aa73a91.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 0xe981fd81a1e00d4506c784be2ebd90068fa8019c9c581e42f729fbdd03ef0b89. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:07:11Z), 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/QZMEM2034810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3801cf7c7f015caf8d146a0b4669c8c640dbe4f44f5ee335458707fadf534e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZMEN2006097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9bc1ae4ae66cd6f41c277074f32c86ecad238dd806b7abc44d4a2b2cc3a1fa. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMEP2038069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3ede86e8ced6a094fc3b3d425ecfc6ccae31c28efcab2afdfb899c004dc23d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNWX2062790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9716089bd1a078286b3e048252f56ab849a9d9b5b01c91a825c76df91154d7. 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/QZFZ22185910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba13b9cce062f1fb13f28de41042d705837c5e5e6dd7af3d4bf9cd4afc8b4925. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA62196112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba423ad95c6f7ae547e03acce3f0bba2d1fc446dfb24963397f100cc91710b4e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZES62183539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc37b6102882cd09bb10895505f2e66a01d0274a7dd18da532a8583bb58043a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN72195572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191644dad55ebc18725e4920419b546247928eba3a2810275c23f0eea5020ffe. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZK6H2113777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6561af29bd0cce582eb19b68a31513bd2387bee7869ddcfa09d9392335451d0c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEQ2182074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2267b8f3df85d6049df4d4ffc083d395ca295319a607dddf97690e77c2773b28. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAX2242411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2206f39248e9a9a72618cc7fb41b28b7a526a63b563d006fb3de18fd45753766. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZDA52386745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2b3f7d9ead041868ca5c089c139ff6bea4e5a1194d1f23a27331d81aa7818d. 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/QZTAU2369641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfee42fa2352339e5e3e77534381220c23b2522ddd9f97027be96c4f6b823b1. 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/QZTB62334637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6374a5f0dd51b82f1b10882cdebb2cc050f2dc1f25e86944a127114d67837cc. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:28:28Z), 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/QZWFJ2365397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000b146d23b8712533da31095de883052e18c65b7fae28a0784eaea7f7f9aff5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:01:04Z), 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/QZFZ32566287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf981c99a52b2bbfc7f3021c47f38d3edbc2f1887df5b9c71b1ab5773e1b8a6e6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6J2576684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a10cc47d19021d5a21772f312d007485538aeba2fd7c681db2f8d913a8c842. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:43:27Z), 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/QZNWX2581871.