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 0x6009c5575fa0565562523d63fae298133e184380df65e6f1e970a37877c14d25. 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/e6e7cd23-a23b-4228-ad06-c047b710d9c1.json and https://artists.proofprofile.net/proofs/artist/e6e7cd23-a23b-4228-ad06-c047b710d9c1.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 0xbeb58989b01d879864c5de5a1d6fb5871f358b2d6c081d0b805a6b1af4f4c4c3. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHNB1900944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bb37878026d6a53d7dfd612f256881e47a5adb14a260f2b6f82dceb5fde320. 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/QZES91833958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70453035556c30904c009a2372f1518aab80c36951e8345335fd90b87eb2f9d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES91838235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c37014c369c9832dba25b7022c7150538bc6e0cdd2ceeda3dc50b513fcffdb7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZDA61932329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9403110ea8cf0144a0f3b3bf12d2a4243dd6328ebb7281c0d1cfb21767f6eb1. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/FR96X2186656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a449cb9e419ba9af908eab8cc4e89eae53903f4710a7083cc8a17ea5e404da6. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FR96X2186657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8d912ff32f580ecddc8e1133825d1dfa8bfc2dd807f85946aa57695422718d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FR96X2186658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab30a042e1ae808ebd7f1b49e6268071a13614e676888cf2dd5ea1ea19c9926. 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/FR96X2186661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efb30bddca2a3efaff7e4c9afdb3a31d048fec7137474a137946d49d9cd31f5. 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/FR96X2186663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17d5d8f389e5ce2b0c2f7a6444f57ad96afb114dd8a5dcbfbd08a6b431350da. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR96X2186664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc870ab736743ffcf212376b1c31406499a9b61bd021596238be0e0987a2702. 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/DGA082285324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530c16ff46c863742d7bb92ead7b50f05ba9e2539d32fbe0a6e1e423b536c18f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX872491237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b62abec968a2fac1ca0eb93a791c172a5912feb017050b04d19c865f7a6ef7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX872491239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2707ee9777995e3ffccfc813ddfd172412c30efa7ee4d881a71fe5d269018f99. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FRX872491241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacc6fcd4118e38924a08b0166fcdad3af505228e8b0952986e4034630bcece3. 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/FRX872491242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857fda3a42f56638502eacdee1921f03b43581e2743a763192fd544b3d081ef0. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/FRX872491243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d2fec0ec051ff72586c1874ea493817bdc9a35c083f31e9f082a50d6a10d51. 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/FRX872491244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c764c29636c94d003177c95cafa6556e95c123f18310fe85092143b5a9f013. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZES72578891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdbbcc37eb8ee485466091b6a18644dfb557a93d6cd876b1de5f92a6be29590. 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/QZHN62523464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5952efe0356438a75e0a20dfff1e4d7f1d1c7bdbf5c66ce307b297059110101e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZNWW2573414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bdfc6176519503f6f416d6a52c099024f0434f22e8a2cfb643fe27f8dfc69d. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZWFF2591879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1692d57f73f879caa0c34a2ee93f0882b9029f8dbd4dacd156dbb45cbdbf5abc. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX872561286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beb98da51a6f5b479251f7a92923e4453e75c124e9074ec94a2d9f25e3f3bd4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRX872561287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f637ace23e8b54c7fb7d9d6f8901c263d5d249e4020ad41f3a8f832293c76f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX872561288.