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 0x1306e673f915c29549db4463560dffc01ecf18342bc6974e3b6d738f815b35e9. 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/3249e34f-77e2-43ce-bfdf-b0a97e4413b8.json and https://artists.proofprofile.net/proofs/artist/3249e34f-77e2-43ce-bfdf-b0a97e4413b8.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 0x70ef65c840f46bb0c6625fc8a66b8aca4dbb475e624a1bfc6804a9cc489ed613. 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/USHM81835011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399382af65b8b3a8224bd8a05b245ff6568b996b0c4e872ab278d7a521160d0d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USL4R1807844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efec1d7b0be8ed4d9db56dcbdafb4f2459db427f19d4435dbe6fff5c6076d83. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:18:04Z), 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/USCGH1909779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8969903afb96d832a75608f2fd2864a1ab7ba5cbf288a65a297a219ad25d888. 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/USCGH1909780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f67136907c19fd7b61d94dd11b0086b515f5694ba42aa1a69a2795a52a860d8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USCGH1909782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f113cd6ac3102ca01914fec91f76580555e9d969ffad3dce96375049c14bb0. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USCGH1909783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f1be19fdf122995ca2b94496b43b1fe760150c5d3ccab9cd95020804df916b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM81955279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e66c3d920dc2709bb2e3da52d5fd45aa538b9214d49767282939d99da60b45. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:34Z), 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/USHM81955283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffca506f9ea250b6fc821d6df56c6c08f7c7bd8bf800f8ee3f77c96db213479. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USY251985541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecd0122bdd597051d190b5500f2d503dbe4f65c28b57e74195929157824c49a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USY251985549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f77771aee04ca465bc6b0346d893ae16752cc1ca4074ed75c7848854f1e3d37. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USY251985553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca7d4f038d625ad31895e357f16edeec0b9382b7cb968d50b208a8e72d87805. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM22186334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eae97c560fe7d757365f71d3819e48471e2112fc3254550234c843b46dd1e9f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMDA62118432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd073ff23164eec9971341442b69f4d760f1f00f438ca1740238aa2efe9b40867. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QMDA62118436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1310be5955d94faf7bedb58553be5f0a31f9e3a156dd4bbb7866b2022e44ac9. 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/FR96X2414557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1310be5955d94faf7bedb58553be5f0a31f9e3a156dd4bbb7866b2022e44ac9. 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/FR96X2414557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00750e2594cda7e5e0b9648be3caea13496656e344a7f13dd89c0963473476f2. 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/QZWDE2257551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9f2cc9cca35d6d96ef338c5ead7ccc798bab62cc0ae6e14ef1810bc103b094. 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/USCGJ2066883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00750e2594cda7e5e0b9648be3caea13496656e344a7f13dd89c0963473476f2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWDE2257551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bda5665142e6c4aaf78e0e48578eb7893c30efa9ddcb692319725778610174. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM6XS2100800.
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 0xe9573cf567580d5b3b3a90fbacc86a93d7a7f956b6b4209c7363d7737cd6fa14. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USY252147621.