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 0xd6c9ec50a85367d5f8f65649d4f8365cb7b35e5709f1ce82a982694bcaee5b89. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee6369ac-88b1-43fc-a576-335fe7965e6c.json and https://artists.proofprofile.net/proofs/artist/ee6369ac-88b1-43fc-a576-335fe7965e6c.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 0x5e23c6a09bdf1b2c2ba03130d0c15b18198bc5d5a0b524cfbfcf0ac9b4d1beac. 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/QM42K1854853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611625d2289bcc67722cef2b967aa7010e43acd95f75fbf2d43992131e08c04a. 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/QM42K1869995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8052b20c37f5a9f44bf8542632cf8ea2bf7d4bf980dcb46556fbdce46537a72b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM42K1884472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f0fb2c18181442768207dd240534ba4056284e21fe5b1eca44cab4b04e4df0. 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/QM42K1830274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fdd05b0c4ab45fb78f1aa34b14c8fc362728c4ff274a3c4b4ede1efe5f3dfc. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/QM42K1886868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f0188545fec89fa94c3faf8b2becb017743d98cc62a15e978d39c0803028ac. 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/QM42K1855138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb2cf8135c9b76b4f29b4d0d7fcd1b95c2bd6535236647f26d0d2b52e84f9a5. 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/QM42K1892378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2961163c19fb3f6a490f20928a182de3794e815d222677a6b1c48c12010e249a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM42K1871862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf952af3d1dddded418d03bcf7ab8864fc7662728ef5bdd2afda1657869f2cd3a. 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/QM42K1835110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeb248db0ea43f673c362ecca4248776964642bea8d9fe2b1dc8aa2a396913e. 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/QM42K1877634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994d1967a3f363fed80a3bd85d851581ab70ea368bce42d7e260fc1776413b79. 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/USQY51748053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84930b5dbedc44f23d5a4e47d28d07d3242971c00a86ae16dda3b4df62f11cf9. 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/USQY51748084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bf751f0ba6195dbf3786989f1a180aa238a5bb912b763343523b480af1ed48. 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/GBKQU2251685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cd8bb55ba136fea5b3e6dc317be3754fa3d50674bf97e916692ac086329198. 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/USA2P1530705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb23612146598c7309a5ee35d89f9b8472ef74ed1bf8198c6d4c81f5c571e4d8. 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/GBKQU1490824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abbb90c8b45fa7a6ea2a392aeb53c8516af3cebb91d171dc92d683c0ab09439. 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/CA5KR1052092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb80dc5cba82a0e52974b5cce4bb54ef9fbb604a5c7f56cb693a00a355fe7fd. 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/CA5KR1052094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb5f9df57a0c9d086ee30799415513b30b262323cf168e564ddfb632e327b77. 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/GBKQU1467830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f30c43404948ad56c6dfd03cb962d4ccdd78c40eb3d5441824c2353b67e48b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CA5KR1045523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b26fef45b447dcb33121bbe8cf22ebf86527dd2097cca3d6bdd4a0bd71de688. 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/DEKB71538723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40a0e7edfe98a2090fe095b2054de9af92c7ce3b1567fc6690982aff7366f47. 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/DEKB72026026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1570fd461f3c9369c6dcd24ed97cf45cd70f559873d11a32f9d7d776eaf26c3. 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/DEKB72026011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb044eb6471fe9edd63c3d44ae9568845c5ce2f14f651213d38843be484db72. 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/DEKB72026020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fe863ae4e571c917610de00a8b8fc22d7c15c85ad7ff764bdcee91294846f5. 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/USA2P1682763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a9d8870923688fef61d8ac0e0ed49db9c8f68a22e79c9e4948375b76a17270. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU1510025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081551f26519c71f935f96fd7bc85e8086319f1fdc0b4ac23912ffe3f179a6b6. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA2P1468087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efb940e3e84e64d15a9dff3f118b7bb45e406b9ebfcbd37dc771d279c2fe541. 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/USQY51748874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e3a1b8275ff90938d0069d504877c3dae24e0e43a954e566644555869a7b2e. 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/DEKB71539531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd12fd7e5bf8233de492a131d09a61059ec52c7f677e64a122b39a8293eecbdc. 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/GBKQU1680339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ea2b44340c114ac9b45973ad1146cf9080b714e6cdacd8f9e446a32cf62de9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEKB71539645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06265a2d07692cd167ca7f4e15f84c2207f8a74a300b40b9375be1b6b8f1fa99. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBKQU1753927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad5139fb29b523f91423f0a082586a7a8308f625b6eb2e4e7a5d2e55889bcad. 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/USQY51748648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd9367cbe78c3c7e09c6a21c6df599ad87d7d0a0d9e30d6f5ff03ea16e771e5. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USQY51748452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c47f3337a769652a79b0da43304626cd0ae05fedbda2b4b5486123c87fb85b. 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/USA2P1525729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685e1c032d430c6681730b2b8c32cd1f19a121f00f9daf48b4a9b0f225550f54. 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/GBKQU1526858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9dc3302b0d0ac4bbabc746ed54e19b322f868a94d943e8a9e44406c34697cc. 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/GBLV61407257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a1ef24614679f749081818de2d89b5dcc32ea92608f2e4904ecaf2c4f0ac6f. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USA2P1525523.