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 0x73f83104f8fb524f72e66d4271e562655b0cee1cbec74046d503ea89de995fe1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbccb47b-a56f-4939-91ae-036dd76835f3.json and https://artists.proofprofile.net/proofs/artist/cbccb47b-a56f-4939-91ae-036dd76835f3.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 0x79c14adeac970fce2f8a01e513afecbaccab20e929481e4e1c0bd5587f82bd91. 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/USHM91082951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39789657590cd945c20f65dd6926527937a611ec8850de57378461505694d97. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHM91082954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db0003eb1bc25ed552be2f6fd9a3d7a8178cdb6ac2bd22533218f512469ebf4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM91082955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec3be489316f1f94ec5d317efbbb19a6c159462c8d7d02c0786a495a3a97a95. 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/USHM91082958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1661556b04286b8222d123cb17e77b3e48b42596f0065ce2efdedc4d6f6d3a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCGH1250545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b963ec46762f9e0ae7f889fcb194881c194d53413f6466b1a17f1348f1b0cc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1250546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b27f029588ab13773ed96db2984a36ad85699988f3f09e8e0ac42f46ac8cf5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1250547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708ec7aaea5f7fd1184ea3c0ce2b14542c0d92012c728eb2ea1339fa20b223e4. 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/USCGH1250548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3f039966e1d9d81574b0e97999d96cfd9b2c16053bb434abcad310b206f36c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGH1250549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc061ebc571f3496ed1e7982bb9e9bec907b9a3c1299d53ff1e8060225679a14b. 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/USCGH1250550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7b79df08fcac33e3ad19231d0e51eba32c37df7a8f9abce7c78cc79542ad7a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1250551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5df39ae750e303a8a632d6d817f611cf688b61a864972316658074612846b8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGH1250552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5440bd7b8d7712cfbd2101d38e0f6f2ad1070c2738f9f83f165ff58cbc7e0d99. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCGH1250554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ad5ce390b4c3768442e19a2057f2021f459b040de2fa587e407ec5bdf17725. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGH1250555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6750dd686c5ca33c7dc588d5ce50da4eb4d1123f92da235c1325959768721133. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH1250556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c150f70d3e33a9ca3ad8e8eb3683dc1794cf35bafe33c78804e4b60db07fa5. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:07:48Z), 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/USCGH1250557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54af7f49043fff862e68bf335005b2cfe728109c38ecf01874577e43a3fa3362. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USCGH1250553.
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 0x20323ead7a891169975547f8ebd49af39ffa2fc69dc2ea9aafc1eec3150d698e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USCGH1526439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8557bd390cecac493b3e09f1acdaefbd3a2b7a65a4363bc978677afa4bd9f7d. 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/USCGH1526440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb792b735b3d5049b982822fba2da7052c2854ebc3ccc12b2203052b9c6d96d26. 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/USCGH1526441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa0bff818c1664fda49e405d0e7c2b67ce07aef3e950d08caab3e21421eca0c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCGH1526442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8110c8f66e704df8d91c481b3af52fa27da82afa61aad9c8725d992b4a72cb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1526443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115b4cd84c1b474399dd90d4dd82f3b38acae1ff64fd8f5914c4c6364c0bac1f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USCGH1526446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7ad94b54f725e3963664a2e97e3a6c98904e6ce616317544c74dccc6d4e4a5. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:11Z), 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/USCGH1526447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a1079baf89e6f5c4187cd62a9cfa3666d94fb80b27c0adc772971d5a645823. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USCGH1526448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c96c61d6158f6bf17e7e6fea2ca1d005b809ab37c2a5c30ff9eae344cb26e42. 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/USCGH1526449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355f281cd0ae06454e6ccd01ed0c69f495e0484d8d1aac2128e09532b2cc0786. 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/USCGH1526450.