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 0xfda42d24d0b84cb5f541d54bf54f14d5cfa67493f48799a113ae3fb6e679b328. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f015ddcf-7437-42fb-93d6-65d3d5336be5.json and https://artists.proofprofile.net/proofs/artist/f015ddcf-7437-42fb-93d6-65d3d5336be5.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 0x1a60e1ed6d1b9fb2a4e87314fe302728ea903ca3f4a22e0bdad82c91581228f5. 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/USA560787989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26b9886f5c9c0ec99abe23cc8c3e6685be93a286c46849603f378ea135985f3. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USA560787988.
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 0x860f024ed6f8263cbc30580d74970ab4a4f2d1747085a282a2ba541e5b061fbc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA560787990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a64e015987905b6a8a9d84c3a85dde640d8dacd7c1f47fb53099c08fc0ae91. 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/USA560802734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baa0a4257be871c0bcab5f17e0bb08edf2ea8b361c572cd746a3bbed57bbba7. 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/USA560802736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1c7e931b82291cbde1c47284df4c8cc50781c93f90bf436ea9d0ce6e695c28. 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/USA560802737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb747281e2816db6c12f7d66c65f10dc57e5217f116cb0589e845f7e734955580. 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/USA560802747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa5ec7b0a57013171e4e7f209b1ff8dcbfa0d3d0668fafdc6e0ca70b2bd3ee0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USA560802735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea469b74a8d34cc62f8356db20a3a9d08bb267e2a0f3b66973699ab016391bc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USA560802739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f939f48a627be5b459a692da6ff8a48004a12ba3f22a623d4d56f1dc4a54f5. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USA560802741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679e84d90b94950778ab0e5b9f73cc1cdc459fa2b5d14a787779509891192e04. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USA560802743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabd9281b5352856f1a7262793aecf73b5cf784712fde9bb75a2b06de1f358a2. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USA560802748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad4029f392697225e98d9620a206e2145b0dd562ce67d933ab2d0239abb6596. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA560802750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41b1fa87163e62d06f2dfd5f47a204135e675abc23af9c7b51776ebfa4c8d74. 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/USA560802751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6d05b44c39f78b6933bd4b5fd178c8f08957fbdad961698fd35f9e1fdc9169. 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/USA560802764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f1a20c61523936965249024d0f28af9d7774a9306df900dd967a7b587800ef. 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/QZES71894853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0903017c57da7ed4d09babc3d916a03e9aff9373533d96d51d1dfb7ec7c078. 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/QZES71894854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb547650ac1536e648eaa8452fdfef2a269d7b3b74a852bc105d7ae9ec660b587. 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/QZES71894855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbaf513911e85dc1c39bbcc98e9c5d7b112cf4d52cee40d4bb37c9449f5b98f. 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/QZES71894856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54877071439795a61f0d6d53225b4d97ce3b37e877db96442e102a2acf5fb0aa. 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/QZES71894858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c84b7453872ceb06dc3ef9be906f87ef7d4d8465eeb9d598e3e7ad8b84a6dad. 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/QZES71894862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4704bf8562ee683333182a8032dc40b0874d5d2ee23d9abbb26c0b31f674123. 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/QZES71894857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4419d8a5ef2092e48d5fc8f6c7d8d056e975c43bddcab5679b7afca95c11b7dc. 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/QZ8LD1987982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caf18ac93ac1e6f7e1b00c3db30110a79ccf29fe0855890b82a9fef71dc03ac. 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/QZ8LD1987983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f559095065150d1125c282f08356b915994f97c87bd5457fad11db10122cae. 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/QZ8LD1987985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c8b97b93e9269720b9d03d9418c92e8f6b7853943fc75699ec8e40fe1700a9. 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/QZ8LD1987986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00696edd9400ccf04dbb055017e089d0238247005e47c83d42ada76c5d90d822. 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/QZ8LD1987989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fade8bb5253d8ea395545b2e8651b53aded1d71194214b2e40553ffd511ab58. 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/QZ8LD1987991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f328b53ff2bee187e6192b7b59f57e772316b98f14ead9053efe6832d1df379. 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/QZ8LD1987993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a237bd9449df6fdcdd08ac4659bab24fe38250ea1299de974e105fb2e048b2. 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/QZ8LD1987980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe842d43ecfe15d20f70b7ddc285086459d750a01ba1b3a7cd2cec8ba65b99e9d. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZ8LD1987981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b06714314cd51ba0d8f7029f21a199de70c96824ee4a5fcf9e6d551d5a083. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ8LD1987984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56df7119782bc6c55b20937b58a7edb340c07c4a09783d426b9c328ea269f87e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZ8LD1987987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23561b896437374362a65196e3930fcdb9b0e7741e9d5a67c846ffad4e3b9687. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZ8LD1987988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979455df314f766f9e5807cccef6901450bc1f1e8e9efff9cbf2f10988554cc5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZ8LD1987990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12d37ae77b5d1dab137ca04d74d00dfa9fc6b7fea1841ab7d6a01886725c777. 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/QZ8LD1987992.