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 0xdb1cd842eb64911bffac70a5a018116d695c3e9710e1b927711f162bac509fc1. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad629505-e6b4-49ce-b373-528ae5b2b17c.json and https://artists.proofprofile.net/proofs/artist/ad629505-e6b4-49ce-b373-528ae5b2b17c.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 0xc5c1f94b8fcabde80f9d75393182580c97da22d3f495d4002da2ad57a9030ad0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE6XX2163990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ebc8f9d7c527320d96ffe03210ef8240d77b68de9e0198fe390ae57cb17036. 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/SE6XX2163991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baa37d70da0c8b98997d47fdd5a93a9da678c69a75dc69cba1f0f79595e25d9. 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/SE6XX2163992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b8b8a7adab4092fabb22b9b0051d8b236b109c6c29be1c9376d11538382db5. 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/SE6XX2163993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d98fa373af6a2e4e644ada83f61523741d96385eebf5d09467b6493213b9168. 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/SE6XX2163994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848056964d73687fabd3e814b6b76c4c7a4be3e4d27e4be7bd471bf522c10d32. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6XX2163995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75713351d1adb27e6ac2f9cb55c71b4f6f4d5bbb3ba3f4f6c0a2ec79319d2375. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SE6XX2163997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8f52bc74cf4a46b32040ed28b5d5d6c3d7484da00d75d42bb9c44d41956826. 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/SE6XW2371525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0823523b09ec51a73b43a8c9bc2522d2014d4830e11608879887ed060e5072d5. 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/SE6TI2334974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdd811a8a8091ad9ed99bc13bead2944fb4b38197c47130ac13db5c6e068b75. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/SE6XW2367124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be8877bb731da0ce8a729497adfe99286aded565437d8805fb8ad18c5641b5d. 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/SE6TI2328225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8d9a0b21365d72b2eb7d42f50d5bfc7e67345e7af6916424ee6ced393cc547. 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/SE6SA2313180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b4abed32fd9ca396e1a0548373aee0cfe342d000904b43e046a7836d6c076b. 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/SE6TI2340561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356fb546009cd37e6e1b0a6264c6943ba4dfeb0a1a1906646e43bdf83469d9c8. 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/SE6XY2306622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e85bfdb472b74cbb07bf3693ada22a2ab1b2fe82de0a23aa1455bb9de2671e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE6SA2543844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05fb0a07297cf85ba76eb6c642a2f0bfa96226fbc14f3b92eeb164525018a0e. 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/SE6SA2543845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20cb681886ceb00f7892707ec85c67606813fcabf1137269faf5c7f87c6cbd9. 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/SE6SA2543846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638d8b5414be881ff97dd251e225b9c196cfff7dae1183f7eb116d45de0f935f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:56:17Z), 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/SE6SA2543847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88719e8cb0805956cc3fd7a1fb08c7564a83ae585f794d53392908a15e48245f. 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/SE6SA2543848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3526a19cd8d625edfa4418f6c632d38b490f03aa0eb4ec7cfdf13fd5575c3fc. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:46:34Z), 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/SE6SA2543849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c922c95dcf8d0c6b569765664f1cf18277b4468a10487ae1999e92c8918f98e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:09:58Z), 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/SE6SA2543850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cd84946a6a65fe5e350db1991634be4830f9f37c5d4419719541ecc14b4370. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/SE6XX2529391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdfe8ed4934992b9b2de75fe206322ebf11bf3c30f5e7463bfd0617b0f90840. 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/SE6SA2543852.