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 0x300b0ec8bf4e3b2e984081cabe640bfa9bb18a33ea045fcf11b5c168bfd750f1. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bec022d3-bdb8-433e-9765-5c3f35083b95.json and https://artists.proofprofile.net/proofs/artist/bec022d3-bdb8-433e-9765-5c3f35083b95.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 0x51bde0f6bab6f30e805797e6902bcee5f92b9aa1acbc621d385e782d2b3a9f3d. 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/LTA321800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96de8277e53daba7a5d499ec5563843ce2452d834ce466c3de19392df928dd25. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/LTA321800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410354e71a646425511f871d458c3c4cbd988a6b0fd6396a8151788501c25540. 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/LTA321800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6154e842080e4ea1bc740517a23e31508539efbd8034f1604f7678f251649af7. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/LTA321800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b33b4ceb022eb9631658d6f05c8f50e9171568054052f18c21fed6f3121955. 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/LTA321800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c2272ebac85e425736ed0acbc86e8c8903f28ffd90a0737817ac2d6cbf488c. 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/LTA321800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb029bbcb635fa708b22213f4237eec76d82a2d2b6961419249f5629c519301e. 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/LTA321800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d5ac8095809cf5c9092a174e3363b091a42fffbd726fb99a2680f45df362c6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LTA321800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02efb740b256b544d73570fdd2f029ae9eacf617eb2f04c766e363b25e1a5f02. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/LTA321800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ddb5f76453b92d4dda3004495977733a2c6f086d6431eb4c1f05590e058c86. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/LTA321800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a2b7cb3b066dfd1bafb13b1b36d84b5806a997a0375352ffd454fa35ab2fd5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LTA321800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea595a08d7a9a2f717d7fb6f646fcf6729dede43eb42b768785e2dc1053093d6. 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/LTA610500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c0ccfce30cdd1a8bd131ea2bab3a0b285a6160c9b5394d8ee6c6af3abf303b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/LTJ052100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9947a38ca265ed4ad51b050b6cdd33b17c05cb074ef83b87125a8612c5bc02. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/LTC531800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf497cdddbcf0d3298cdb42152bc2565913db1e52adbe29a864fdb38515463133. 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/LTA890300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8d10dcef4c22cb7bec28c49796103f0e381e647e9803cf3e2c9da7e4b9aa80. 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/LTB381200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fa4f42a51b12bf9346b09500070b77882511f00e94886f0072bd0ecf486fe9. 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/LTB381200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deb7e73bb8b9f0a3dbaaa382fec61ea437f727752e607b0f666c89f0fcb7b0e. 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/LTB381200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64fd0e7062e0b0bcbdb075d623356fd71e3911edc23a8038b56adacad18ac74. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LTB381200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7327758d1fc51d20de4b1604872e102c5a40d859022ab031ecf1d5474b0627e5. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/LTB381200002.
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 0x4b52e6dbdc7a8ce5a4a736c610488aece8edc4d90fc6afcbb7b635afc897f235. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/LTB381200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b8a166026705075e5659eed4ca45e711487a37eb54ace0602ae6b4d23c287f. 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/LTC221800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c07b625a7daf29ff0d18b848b61c5d50e46027a3066b1e820453115e32d2aa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/LTB600700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c4d63af8d5e25e749e80459579d030451ac01a154abc16ff5539c0a375cb49. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/LTA141900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea46d16b18dc3e27ac6268c386624956aa03f5fc60b0f357e9fa36e15b85e63. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/LTA321600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dd0e4f747e6b751753837b97a5f05c782390ef119abb484b9849fd7a43f8ee. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/LTE142400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f53d40dca4e61eb124e469078b18acfded275263b446e9ce4b2110d5b10a8a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/LTC522000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b0777a1562b14423b3fddf6599755075692ae4bd60842c1309ba299c77f9a6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/LTA322400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ab142cbf506f87b5040900d4928b66053657b14f20ddd3d8d4dca29f88b26c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LTC272400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda93a6427ecd8feacea4a357304d7f6134ee38278d6c220e05db07880a4e7ce0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/LTA322400004.