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 0x374207e080c3e182c118782d748e249c6602e5a1e1f2ba40e2858c98831c00b2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f33c9af-a755-4c79-88f4-379204168d4e.json and https://artists.proofprofile.net/proofs/artist/6f33c9af-a755-4c79-88f4-379204168d4e.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 0xca2b83004c10372dc250b3a2b807f52504815c2b53dce99ad9ce58208e0d1550. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM9AA1630074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51756e348155a982de31876737fc18f3d04585e5571a6a49f36d6b4e464ae52. 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/QM9AA1630075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3dcd3d811ea8d02c753bc55b0f826df17c441aee403a5e95666868fd26dce3. 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/QM9AA1630076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a65407a14dab0d26dfa1d24fd72dc09ed3f703a80db5b87ba6b7b17cf47bc3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM9AA1630077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e183993b5c1063e796b25f89834346942252f985dadd3739a4d8f6bb3274b0. 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/QM9AA1630078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd336bf3e4e59639d75afb0d29f3cfe1361d55b96229e96fe30690a364a3bb31. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QM9AA1630079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38808634a0f84e5d0e0ea6f2bc91bb4dc52edfaeb7ba6a7aeaf99b09418e8fbb. 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/QM9AA1630080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbeb563a0ff4fa25cd80f963abb0d5ba4d6b1596b3711ff3751fabd529c0d97. 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/QM9AA1630081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec5aeeba5ed001af7ec3e359edec200d8f26c013d707e6f6e09a10e69dee9a9. 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/QM9AA1630082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be2c76daac90acfb3433950e9d1a278881aa3650002e44506cc6cd6a5299833. 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/QM9AA1630083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecbe963ca416eea7ab49251d5ff9b9813510f4b49db9df82f47f1329e71a278. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/RUA942340605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cdb20fc1e7fe2ebeaf1005ede56f54797065f9709cd05e65c4a385fbaac35b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/RUA942340614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9410f6a7a24307983ff12d3680aa6c5b9e85bb5b1d8c3c8c96c50d89e40c3afa. 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/RUA942340621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017536b5f1cd00091de2ade23774a7f9877a18461500c6390438cf0cae454846. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/RUA942137604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cc83c6068b2b37caf7c33d62331938a3ba10c9d8da8d80bd70c189dbe6dd0a. 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/RUA942137605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5f85ff9aaf10f6d45bdea5cbc58bbb5b1e29cb0d7d436c0806bccc05516981. 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/USL4Q2366916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85511a023227eb1d7443c7d1a7d652b3607cd003d9f0c6d3472cf1309199b023. 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/USL4Q2366917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42e3b23504f295cefe30a6120442aa6351a9beae2bec2d15391aacc48ecfbd7. 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/USL4Q2366920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb43f915dd101cb07ca75466255470e84cf5f797443274a8354e9b6151bf6a. 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/USL4Q2267771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc190c477f6eb2fec767051de917f9c20b42872f41d1a68e284403843d6f91b. 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/USL4Q2267773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911cdf26c5fcf86e204618f571be3014fd4dfcd3d6e47c0503eab34941755b96. 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/USL4Q2267774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701e73adf60a46166853b2a111c0899b0b4cd8b6dcc0dd08a70a3585204fe8a8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USL4Q2267775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d7845001cfebe56fc59eb48337e9f420f9e9b5b2a2c6646622e8a38ab4c4c0. 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/USL4Q2267776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f126d4e0c037b97405130d2a396840a7fe14345b73228b3de018474351ca5f1. 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/GBRKQ2284634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff2c792e51b8eb693f7a51e920548f590f2479dca0a03462aa67fb75b31105c. 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/GBRKQ2284640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7176703bd8acaf735386c6930a83715b91db0e15ec79c675cf45a1d9b98b3e95. 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/QZ5FN1873962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6a620471fa90c8c323b9ba169a70eca3783b1c04fc19eb282507e657b7f677. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZ5FN1873970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d86b46b0adac6e536be7fc7741fdca0e5891f1c47c6c99ca7067c7dda8a0f1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBKQU1948102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c1dc696e15a5e053fdc430b3b516563b91fe6b17fd047579c8a1113192388c. 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/GBLV62101393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af6730117395a08205aeb7473c4606147aefeac114a9cfb0fb38eb4dea20aa6. 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/GBLV62101394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2df3811de57ce954c194be01a0254e503455a10ce2191b2a1b12f36b85d5bbb. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBLV62101397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6b1f03a17242d1320cd9f5adad9ba84ffb54d6dd1ab0921fc89095ff5d2c13. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBLV62101404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2c74b7f2c469a0bdf337bf91fc19cbb7942c6f20808478aeb660f4cecf431d. 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/QZ5FN1794188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18c185f296692f18bc250b910d495054f91ed416a9945f29c693ca1be481228. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZ5FN1794189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd69c2500aea390b52410404baffa0690666beb77843615585a9dc714c1bf34. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZ5FN1794192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2ea834962c89067252ce544dfe59fee5c73555324d1773d626911fa55ab39e. 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/QZ5FN1794194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029f00f3dea44fc977e7169ff77b304edb18cab62d9951f521ef7a37262d5031. 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/QZ5FN1794196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cf80214c052cbb40a3af67e068ca085022625bc3f52f284f2e1ff2c02643cc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/RUA942138401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a742bf6f5cfb9c2bfaf554305609178f0d137467bd4f551e67946a030179b71. 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/RUA942138402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7af3dcae83ec297c9ad2f2712bab2daed5f7339b46e12756754edaa2d86892f. 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/RUA942138404.