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 0x5169a6cd4ae00d6372f2f6300d3b338068eea2dda671f3b85a85e6b94a99245b. 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/4d56d57f-daab-41b1-bed5-beedb038e163.json and https://artists.proofprofile.net/proofs/artist/4d56d57f-daab-41b1-bed5-beedb038e163.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 0x7569a557245dcc45755812bdb0aa67f9e69b395a7cdeb77927ea456ed1a224b2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZPLR2366251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284c9fcf7df61218b5a893c8861c2e246750e6e2ff90ad2845e4a6c5a580603d. 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/QZPLR2366252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbb67e39fd4bf8f010d598a9b728d241545c9376c991d8f6ae21e3da643457e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPLR2366253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb713682da7c9fced7731c2f341713bc28a38b22d7cfa2f4d58130a52776a31. 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/QZPLR2366256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d126bda8eb71c928603381d58d4823bcd5621f48518df691c94a1366c1ec7d9. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZPLR2366249.
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 0xa907007f4a5d8573ed6121665a3eb4f8429ad594d0c5b49bc70856942f910fa7. 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/USUYG1395441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4bb74fad3690bdd152c2bac97d56c977296b1aa6c1462dd6dcf80b90e48678. 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/USUYG1395443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3f66801d66dc66015fe7d26289e6dd0678f14eb0b872057bebf5789fd8d00b. 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/USUYG1395444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d95e695a8266fcb5d48d8401b3c255e208e6a5c3d40d86ee26f1961c3dbd80f. 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/USUYG1395446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c90fd6a2ac6ba2b1ac9d13e67488b6869dd0fe2d17caa7049729947d8bc43d. 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/USUYG1395447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4159fb17a51513c6c4887f123454952cdfa3994ccf8f34b7e4699dcd9125e4c. 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/USUYG1395442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e53b79e3d52f9a75bbf711b355e695e928b3c11c85da5fafe4a4a2d9c467d9. 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/USUYG1395450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa034762a8a3f96f742aeebc47a10965efb6cb97f2c7cc53699f39eebad531a7a. 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/QZQAY2327127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8429c76a49b9f055d4e34554a2c5a27fa9f0c2ab1bc9f8f8e4cf9286a5b50984. 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/QZQAY2302888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4aae81cf54071929dc5add27e3c0f83d2bcb21b91eff75318fcf2621e93622. 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/QZQAY2340946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2fc816360e014a3eb46cb60c7e5f3f411fede26c4b085ef313ca85c2890996. 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/QZZ792482885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4c810ef75da46634c00047e76fef05e8af23b395fd2da33df8994c50d2a58c. 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/QZZ792482888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadae1715617e38784cae746900aa84218677f8394397f6e4e84ccd7991f1fff0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZZ792482886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cd568eb4b50f1b12f9cc86ee8bf78d3f162273abbe114a50896161aeb8a33a. 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/QZZ792482887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd373619e9994957ddbfec875ddfadadc424feaf816d4f7b22f015f4f92cd48f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZZ792482889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5e64afa7da55b11da35d3751b1316b3ec271ccf6ca390bf3a4e4b28581a4af. 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/QZWFS2426007.
The Fab Four Album Tracks and B Sides (Volume 1)