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 0x176e64d1af67d8f64df86a6da7aa5614de41d8a4e26028ea57cfa224e2dfbc32. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fef1fe27-ad9a-42df-8f61-4f3ec4e52f65.json and https://artists.proofprofile.net/proofs/artist/fef1fe27-ad9a-42df-8f61-4f3ec4e52f65.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 0x87d9c50389983a52d924d8840c169b118c4b7ab0eb11641c04c38ab50eb2b015. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBRKQ2285083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978e48e74171326df7db27ed9e3527d4c455d40c4cca17eda9b6d6dcf7a6e127. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:35:17Z), 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/QZTAU2204355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6299afe8d2c23c1a65c9ff5bae148b1cbb395357dbdb1ad6c3d87f048f8f5358. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:10:57Z), 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/QZTAU2204357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4b75e0e3b79544f80afcf20583fc677b7f16a2c1146d0153a10c49397bc9d4. 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/QMBZ92304011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84d18911743bf2dbf4db722821122318edcf1a6b8c14fa79c9d4f23181d40b4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMFME2343082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55edd75a16b8f8034d72572bb00f5949b25ea6c9ca821fdf88259bdba0e4d7f4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM6N22437981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de4334144fbe1d06e799e91d323a7f5493b225f9a1ebb62ee1e4c5e444c5563. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM4TW2564262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333435fc4b56505cbb6fbf6ecda7c4f23e927838352791b0a4272400857701a3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM6MZ2503588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737924653966b614cdb9636075553e208349bb354e2ef0e168b2a49742f5f3f8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAT2524535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d509c92e635e3c5c42cc5c331a274544e9d4166b10e8371be19e782927128c2. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/CBEYJ2531437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d509c92e635e3c5c42cc5c331a274544e9d4166b10e8371be19e782927128c2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:49Z), 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/CBEYJ2531437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040b0555b97bcbb76583da051ceeec3df3522df14ba6e9c01ad6a12dff509bba. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:32:46Z), 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/QT3FG2530404.