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 0x34cd1fb78baf582e3328a6f3c7ff836d5e374cd378d3e1973d77242e910b2a77. 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/3fd70a0f-44b0-4872-9987-986cdb0eb75e.json and https://artists.proofprofile.net/proofs/artist/3fd70a0f-44b0-4872-9987-986cdb0eb75e.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 0x4e6794a28d4b3ddffad8165445460adde010d01a189fbedb398f860cb9b10f9f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TLREW2221005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2c66ef3ac819f62fabf2ee71a908824785fbfbbb2ff9ce4298592800299e77. 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/TLREW2234211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262595db4a19ca781200c743e22d9e4aabdb24874130cca89cd3f1a1dab85fb0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM2317127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77077a2228741f5b2d9a3bd0c8f42f3662baf1a0af6efe260963364b3052aa54. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZVEM2317128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac2818c3a223365245dca3ba9a30ab4490690f77fb4848f4eb551cffd0332b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZVEM2317129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0c7a24145de1ef878f7ae6ffdcd7352089bd6ef3c77f31f5c199e8807c854b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZVEM2384656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd8d0894836ec7b6990a6d8e26b6cc81a2de648f7dd2f85c39bd602026f068b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZVEM2389761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a3021bbe95c819ea0b577f69717d0d70ee5c38f235ad3617652f92c38b4979. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZVEM2389762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f8c341d3d4d92f8ffcf21ae459c891126fd2813a58fdbb9bfae3eb8f02d904. 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/QZVEM2389764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a66e223fa484ebb15e7a1aef4d9b4bdc8be391c0e37e238c344abe01186de10. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZVEM2389765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab3b073c6c0447d5b91452a51670e3056435ad84191de21f8f6019f83ecc29a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZVEM2389766.
Jam in the Van - The Thing (Live Session, Templeton, CA 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d6baf26f2dd2140c0b20daf5e57408382c121d486cc69226224d648ab25a85. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZPEW2586886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacca49234d3b02553f1d16627cd18223a335fd96fcf65307286ddd94b7252168. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT4K52593255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3df6d9a5fdccd43d95f69c3fdc07ed8234e94f4d37d87f8a94bea529174b64. 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/QT4K52593256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84adb1b9e24ac8d2874921486f4196ed143e32179a3e0bf8f11cd1cfa5d00e0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPEW2586884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820cf113086e98e2d4620b543355a519386232f5075f0fa434ca5abecd483489. 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/QZPEW2586885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d6baf26f2dd2140c0b20daf5e57408382c121d486cc69226224d648ab25a85. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZPEW2586886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a8046cae873f8c194a05a431581f991762e63e5bc27e17efd140e5c45940c6. 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/QZPEW2586887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f05ed0b8c282670ae96544e35cff535ab7104d410cd74210853347939209b4a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZPEW2586888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb2ec9d7e9683f8ff344625f7852269a9229706b16d9200ec4e0fd5303c57d2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZPEW2586889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e159d875d7435651691b5c1628e3607cce937bdb1b2e132683d01818f806cab. 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/QZPEW2586890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe30c989347619c0316a3cd05b765f8fbfc0d186fb3ed5aa0c17256afa859890. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPEW2586891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeec57c8d64d2dd19ae5fd1a441571cacd9a3dbb61ae797f083b7ff09be87318. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPEW2586892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0794a8ceb3c2627927ecc5c807f46c4fe7cc66ff94d7f35b6ee9eb136a46965. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZPEW2586893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62669470522e091516006506e4b6ee1d608a887c711ecd5edbd2330746328dbe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPEW2586894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e5a9682305db1e81d7162b1012155adccff5d3436a26cd93bc85c9ea27add5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPEW2586895.