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 0xa07248f4fef780547a4c456047473df1dfe0f92d20c2ef6a25a74da5b94fdf8f. 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/e71980c0-5054-400e-97d5-a9971cfa1c57.json and https://artists.proofprofile.net/proofs/artist/e71980c0-5054-400e-97d5-a9971cfa1c57.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 0x967a9b210cbe2eb8c2de92a3996fa32d4d57e8847bedd2b36e4aa6b84703b06e. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ARC572313461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aeb99e3bb23e90be64c4d7b0cb2cf4c3a1d698b268958aa28e3c47ecfb49a0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:17:54Z), 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/ARC572313670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77d8d666428e93ff6fa98ae61418e610504c0b536fb55a165b6cc72c0cba7e9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:02Z), 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/USCGJ2391754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4693d4d9a9041e161d0d3ff922e5c75f07966051c8350d5066018582385e7b09. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ARC572313693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e10b5fafb1e7650e6fa642bee785f1c752dc6884ea78591c6b9e6ec8d6af1e0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ARC572402752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9523b70f28cda0ed086646ea5301f532c80e95e6793a95857405c14e00e6fd. 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/ARC572404521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e159404b7a41c584dcbe5d7e9b10b8b47f70abfc4918937eb323a13ffd3bc53. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ARC572405865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5493e684e240d5a7c7edc77ed06b41dcdd6e24d91890c572cc48d98af711ad95. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:35Z), 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/ARC572407146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfd9f3ca320050124ccbc2311a65f7ed867646bc5ceb47e9ccfeae702cb0983. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ARC572502558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57a3577163d3f229549a1129bc9025c5b01ca598de2b528d4554ef1dbbcccfb. 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/QZNJY2559008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bebe5618076f716f2e636536d86d6e037c357d5dcffb4a747d2c22e9f23a7d. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:21:40Z), 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/ARC572504482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6b4077779bfb57f59487453e79b1d1f03a29fc2f4800685f329d9cadad1c29. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:48Z), 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/ARC572504619.