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 0x617a8017b13c6735636b570636713b8b4928fc7e78554a0f7a1d1a12f6f44ca9. 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/5c06f00a-63f0-4681-836c-561eab84f1bc.json and https://artists.proofprofile.net/proofs/artist/5c06f00a-63f0-4681-836c-561eab84f1bc.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 0xf43f215d1bd33b7a49803d3ee4056d57b725d4e87052762e33a0bcc18dd4c0f3. 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/AUMEV2447056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3beff1534fc240c499c2314ea44f73f0055436479507a4219c7cc5b30f5acc3. 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/QZMEM2488718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948a3f6eeb32089190a364c59371bb0a566140d16144095020a9d3adff269fa4. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZNWQ2414507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff9b35cfae59fb0e05e203a8389bad465c2764080efecc399b086f6ce71ebc0. 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/NL3M12407277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72fa0c97b0ff52425754d0ec00719e5012ce3e9f885104c4610fa2b10da2a9a. 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/USANG2482858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c2404e9df45a123f487f2dd4691b7cfa074177ad656043278970103c29ba71. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GBLV62412715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911d1b8a3cf661d3373122c543ea2b9f206e2e94c017d0523ba6350814615b94. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GB8KE2428979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e36a32b6abca4e29c60254bf63ec56cd21676666909d5034d45466e1f8031f. 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/GB8KE2428980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d521090505b696e9d294aafdb16257dda2b5c75354683f96e902cdc7d380e7d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NL3M12407387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4140c4a7e2237f33a349724a6ddac4ba790d2bdd5fd649fd38e335cce65191. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF2502114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3298d5c8e9d118e3f449b8170d70727c897ea293ee0cc32d6913db899dbbe8. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/US3DF2502115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6c5967be3ef4b6e88547008c50336f11bbec174a4cb3e06ec1f70369f01fa1. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/US3DF2532210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492a486a6065fa846698e3458f02cdba17b7bede797d8bc526793f97ace31871. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USUYG1721395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7028f80da5646f83df8e76e233bc0b9d75db54bac139b1cc016c0f75a154c1e. 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/USUYG1721398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001ac8be766740f050bb58d94c871492b42db51583b52fb8dde23b530f3598f4. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/US3DF2552516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6581f067da81b5c2482ac1c9199bb83e5596396625b996211478ac518b0c973c. 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/SGW502504544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614db72a96a61b12c008cc2874903a3c6f0fcb252d46e85ca5362eec5e6a6b89. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRX282582296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fdf6080f327c392fdd0f1ea524ace4cca8327cb65b052b2879cead3d877d34. 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/GBKQU2552812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76727b21bc391b03e879bd97930db29e0c7c851c7b2c19ceaa28a224da2760b. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/QMDA62521442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111d5ffdf61217d2de188b477a2216972ae3a89a58196e75c37d7b04ab94057d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWV32570965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce018c5f66f21a6ba28938dd94ff766af5a62ddab4724073306e412d3aa92db. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWV32540284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8736aab7761b5bdf0869eedf703140232fb23796fee26ca05e65420fac8030d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWV32555300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9c3eef7d815415369059b2b2876eff76a30e73e0cf39ecd386b0c00f77f950. 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/QZWV32555302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f7a052a26e6516cbf9b111275aca30ee83daf739766162d92d6395d03aef07. 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/USANG2532999.