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 0x26d763346d2b5057ae7545fdf9125a50edb1c20a4d3a7874cc932ab5cb318a98. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2de7e4d-5038-43c8-8f58-6f6e6dbec8c6.json and https://artists.proofprofile.net/proofs/artist/f2de7e4d-5038-43c8-8f58-6f6e6dbec8c6.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 0x7ead776dd74f3130c222faa4def381543405b78a8e777f72d01118073bfdcfab. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:26:06Z), 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/FR59R2366530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fff4df6c1148321306ab2640ed734eab0d8674a583394f1d406ce4f3fe1b0c. 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/FR59R2366531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721c449219c71cabeccd986f82bdbad21861e10348e7cb91cbba9553dbf6ddf3. 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/FR59R2366532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7d50c8d8352d55f31c70a504ca9b5450b984d1ac77d627fc357402ad8d06bf. 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/FR59R2366535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffbeeb93243d0f574107fc34feba0c6e8803051ff33aa55a01249822930364f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR59R2366533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a7c5ab8b4cc030f539bfab3a6687e27605db5e71404e2da2525585a49bc541. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/FR59R2366534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3184f498db50a6ec82f1749d4681ce9aa3645031e8ff90ee05fb9a5adf2787. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FR59R2366536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f1f386356bd24f8db4a6e600bbf14f12f4e0e7f6c95c8132dc46c9db280b0b. 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/BXE952100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978fb6dcfb574400aed6249bd7e7a29a5d7e1f75e3f1d8d8bc2468b9ce3ca825. 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/BXE952100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec6230651a4a8922ae07590ab1b3f43632f86ea645501b4244f85062dac84f. 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/BXE952100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39419aa373a38d27c6d8571a9ea4361aa76c1c6fa62e08ac6a23e8d5ec692371. 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/BXE952100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5d935c3f07d6bbce38be0efaef672afb5b0389acad1cf844a5231fafc1d5e6. 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/BXE952100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b6487e064a83a71c25d6e3163e5ebc336aab8161ff6b70dfab2f78928110ec. 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/BXE952100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0cfaeada1671c5604ff71ff6ed4627ae771fcfd9ea1cc27e5e630d5344b727. 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/BXE952100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54eade65c5e903c4419dde759a53a344f1170ff4b77635650f160c100d6b64f. 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/BXE952100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca736824f1cdab920ba407cde8ad58b66649c2e9972d244b0eff75ad13cbe7e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BXE952100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a855268cb963afb237d13ee1d321b802f7db2a4ab1f6f645677858aee01e71a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BXE952100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77942db4240f40e90a55ad63a3aa4ac3265c3052ba4e735cb841024433ff2dcc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BXE952100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2965a98a21c47f0b5a153fa9c198ae9e4a6365651e4a33083c82eb3e0d25a671. 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/BXE951700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c86fcae86a3366846c80d416c999d9ad594dbe9c68c1a78c842ecafe54ba5fa. 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/BXE951700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94fe43539ee8f19c8ffc97f0785a17ad610dec291cfefa2278c47719c081995. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/BXE951700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f7061ec9f72ea3aa6ab4ff7aa238a5ad733a426342900094e30faf9a46a4ac. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BXE951700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ece14e19a04ced7ab52586be0ab861c7b33321327fb14ffcadf3095f588b4e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BXE951700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0828cc8a6615a872d2dba56b24c13f4b1703769418988d9d883b4b6eaaaf1b. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/BXE951700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ceded485507d64b4df6b6ee63a49933196fbe3665baf95b60deb18b0bcbfd60. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BXE951700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b33e8e417fbfbf1f716bf4597347977b4db3b80a6a0b967ec77bdbcecb2c67. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BXE951700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575029d16b780bda241f17a808302d25b0107f47f29c327b9a4883a1a1a8c90f. 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/QZ5AB1852987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a59dcb3a1a4df49876bd90b3d54a0cbf77c066940fa654885d586b7611a823. 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/QZ5AB1852989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62979d066b50f7634ce005825e2ab8b10508df3be45f3309ed70ccc8b3d9395a. 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/QZ5AB1852992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ef22b43e3cd22e73818a98c837d563858c089ef9d6d350c979b07e35c20219. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZ5AB1852988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd56d55d4baf6bcb691f4532ef509205057384f9c930a51d39031917e11c76b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZ5AB1852990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980ccbbc02a2a0286b1031e01720682656eab340b11df19237ac55ca8f6bebae. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZ5AB1852991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94100d7412aa7cbb546482a3c9d511d8a762eb2fdeab805aa5c484a02494a306. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/QZ5AB1852995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bc424026f6a2b476eb4a05e2632d20c6f6e6bd789d317a572d53e7b8350bf5. 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/QZ5AB1853000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f950f799f7a0f7cf941f8acd696f72c4e5e1e400495adfaa1ff95c913d1e6ed. 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/QZ5AB1853001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cb31301f5ad3432e34ea6381a3f0f8d6515ee6903d90899f574aa50d9942b6. 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/QZHZ41979868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ee3a6502826ed90473a5af226fb31684cf5ec3bdce88bfdc86d628d223cbc7. 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/QZHZ41979869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2c4054575905317d05f650b36cc08abdcebab3a0814834a8b4d7d60994d620. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BXE951700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c07226b0aadad3c34cf7ae13fae996f4415af3bcf7d8aa46a9fc8dfea70512d. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/BXE951700020.