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 0xfa5a03ddd4ba17058f76108decdf76c9d0a362b6f6ce168e7df9a0efcd2cb0b2. 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/71972c4e-57f4-4774-bd67-13c9256bd2f6.json and https://artists.proofprofile.net/proofs/artist/71972c4e-57f4-4774-bd67-13c9256bd2f6.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 0x73dcf9d7132f9e4a2f791d8033f757db74ca2fb51a59b624d5b465c85830b3fa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA591801807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756549948bfcd186a35ff339252ed3b178f89058be70a002915c517a9f94ad02. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/RUA591801681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ab844d4536125423a922d56bd5da0e96ee7c2ea634ff76fa7a932461fb278e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/RUA591801705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a4bee05e1fc9425efe6de8ee8c7620ce1b8604993bf06b1eb685badd6e8166. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:04Z), 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/CAENV1912601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0684e2c4c6ac716e6e6681be5deead34308fed43fe00fe76e059b7c036499757. 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/RUUM72000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62718aafb0b8df1a34dd5f27163cea69201e0e6e0b634848081f8cdffca41e94. 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/RUUM72000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a9046736ce0853d4fbb6f4124431013c9a17afe9e13f2c3f89aeac477ca9fa. 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/RUUM72000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139a542974ae0361dfbd2864ed258751376f73a7b628e13a553378764db3dfbb. 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/RUUM72000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94f1018d2606341afa530639b40fecea623ca95ef14820040212d5cadb1b168. 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/RUUM72000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31b2624a233d31db528ab1518e494ca153d32c01f7bd0e1ca4e47b94913c3ad. 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/RUUM72000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860961be3056ed85ffdeec287aab19fde53b6f8e5c948349cf6cea91543fad51. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/RUUM72000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f95d0ebdc386ab59755cf07b8cbd99b8cbfe59b79e49e79b1e37ab1513c44b6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RUUM72000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3a7a8d6fca5b8b1c3c60e736ab12ecfc002d52955c4b4fbd079ba12ff86eb3. 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/RUUM72000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360e4c070e966bc3671df2ce6ec71253c77a083642931148c46069b1a7c7502a. 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/RUUM72000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48c5c52b0e1d1dddb50d4e6fa1fc4a1d1aa7a54a93f6e918c5d7a1ed8323ac9. 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/RUUM72000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745fe1b0f8d6ee7af70ef3d85f57f33991f0fa3cae6e45139406300dce4bec38. 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/RUUM72000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621e20b60510f8ed92a353f4c24fe846aed1060749d7b87724f7e11beee972cb. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/RUUM72000023.
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 0xee68484c0efd234c52a2aa69caee56737280fbfdf67b738c6a44552f204c2205. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/RUUM72000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdd992eed764d124d1bf51cd686738c9e07074a45d02fc6e42c1814d56db49c. 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/FRX452459650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8228a60a4af3a59c8a55c3795f2d317918c02c8c43e35e2ecc0f6fc872551f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:08:48Z), 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/DGA0S2428883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5300c380308e876bec592c40aefc2459347a60cd0bb221e7735233241ffa05b8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RUA582001795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f91cb581d5e8550400ee6e02f745f8b3545284bef134e86c36a5dc93349e58. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FRX452047176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b909e15ffd64ffdc4f347468aab7882857bfeb96300bdfc10189f28628b8b66. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/FR10S2096983.