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 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 0x0432111fad929fa39e2272fe01029b35bc639cf1637c77f3a27f5d065dde22c2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fca51a1c-12b1-45b6-a2e1-4589860e0de7.json and https://artists.proofprofile.net/proofs/artist/fca51a1c-12b1-45b6-a2e1-4589860e0de7.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 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 0x7f883ffe9cca812d12f1a53d6417395fe064d12e84e1d1a66ff3b1b7317777e1. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ES5160801215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3946a13e3d4659442570dc291dced7b80d60e8bbd403065cfa12bd7b165f4dc8. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/ES5160801220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78488ced6569845a119caf52c5f2b3c3eeeaaa42315777f162245b1b99ff75c9. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ES5160901388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b7105cbb5d5d2e744bdc670bb84b7944aaf2ef4ff8d18f4301ae03017edabd. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/ES65A0800511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9030003bc906c9a64dada86e67e1587bc401fa0786b698add4bfbea6df977d. 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/ES65A0800513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05be515c3dcd8099982068563c3f2266bb3f3212db02cde6d9de826d184612b2. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ES65A0800514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43540b14e6910e15adf79216064b874ffc3542b2e13c1684906d442bb0cac522. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ES65A0800521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d11d3d0031953e91cbb0ee8fc31e9f436f59f0987efe93f4c615af2cea5aee. 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/ES65A0800634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1842e3ba7707e58b502ebca286b8c18181e2a2ed0491bbebb8a306b2b9ea99cc. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ES65A0800622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf09cdab56e74531b911dcc3b4b5eb4e2f287f674a8d921e08941ce088c810f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES65A0800623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a37d3a8286d82df3e6d3427e7e7a499ce1d0c9c08dcb7539f11e202d92ee31. 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/ES65A0800635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec43725f31193d2579af134fc1b39efe967276c179eaddb38687a2ab6b1913b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES65A0800636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b08f9b86e27a02291ca9a97b8b476c24034743ca0b1bb06178a772abb9f649. 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/ES65A0800624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42296f2210e6be1cc4e3b67c634b777b64fb88e5ce33443744e6e3ef16c86bc5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES65A0800637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbdc15faa1f324ee6e928dfdd31a1a1c95d99191dc4a6a80f6c5563db1cfcd7. 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/ES65A0800625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac69dc538763e70ea4bcd828edca1cb8c727759e8683d64e1301b2f73d6f930. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES65A0800638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d43f33f21eb7b708b19ca6d792bbca3408c7c3fd0b53c54b078059a4add185. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES65A0800626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f928260ee8895ff5246ee46b0a10d24164c49bde8d7015aab4d0f95acaef633. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ES65A0800627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16478ce9643649f3728582ce089edac460cfa81638ff3e2cfeba3cb59b05dcb3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES65A0800639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27020a1c2180bde41d26ebf1efee86beb7ed878b8a206e5a0039e2ff2b953f31. 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/ES65A0800640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a9bcb926fd9b669aebd9cf328f359096c85e6ffd51dc57f38c35765eb23d10. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES65A0800628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0e8c68c9ef1b3a144deb2bc6ef7706fe2a52fec29b267c8bf08572fa02dbc7. 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/ES65A0800641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5074384e143d763d6f73f120d3c9fdd3ee42b531a85ae6fd0a1c49de82bec441. 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/ES65A0800629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26067094a998af06e0c757b8e54299eac401bd5a32d8042232bf3c14f0ba7a61. 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/ES65A0800630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5750f38c611a4d0da9b3d8024039d55f36eb3a4be8f37e840dd9fa46687019be. 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/ES65A0800642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bc560ade88a786086c126e70b72c101b55dcce8ae83819d44f71b77eb1fe83. 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/ES65A0800643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a642eac0882349804eb56f0a0fd44d7ec8c4bf290f17fafb8129351f930131. 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/ES65A0800631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453646432825393e2c85ecafd4a5396556aff2c1eb642ecb07662c3ab10d7231. 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/ES65A0800644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3edd2b25a87bccc536355f1cdc9af122eb6e709fa107cfcd0f9fc9a7d33b2e. 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/ES65A0800632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f02536a6eabd0eb58102b5f30a6d43bfae6f44d21568e70269f74d537fe7f7f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ES65A0800633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909dad118bb1bf13df97bd644fd4292ed102c667d8174231b21099eeda30f97d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES65A0800645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb1adb30b06d25b8d293718d87dc7678265b86ac7371e1378b381038cd782b0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES65A0800646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b987c7c0714a2c7c7232eb10edff46a98f5327c8755acdcacf5e1a30c715fee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES65A0800713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b52ff489ebf1faacf516a0fcf8b52d7d2124f1c8e5645cf670b7e4897adae4. 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/ES65A2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8b1d979669a8e8d9e64637612ee1ef87080d7dd059553649ea415cd1b27575. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ESA092507058.