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 0x44f8adc910d5b51ec1ec66ea2eac00f7b899792142a569ba5887ca0ea73c4164. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1d071aa-5382-42c7-8420-ec75b440960b.json and https://artists.proofprofile.net/proofs/artist/e1d071aa-5382-42c7-8420-ec75b440960b.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 0x4bf052961fe13a742987cd5660411073a79ee0dcd13af6a3cff40fc81625bddc. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USHM81233478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2ec8760ef0975c9bf0b85ec9e6205b0f7eb86f930cc3bacff8a7d02a779d9a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM81233486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0f4edf45ce9cbe4b7f17e7a71d48e2d406d86558ac726c2df0d3271d0c98f7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM81233489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46731016a43f091258cf5a8d9056779e360025bc9072c53bbe76ae361ca511d8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGJ1343898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1e4a2b42fbf50b5efdfcfcd18233c9cdc71b045a57053cc546b323aea869d2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ1343909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c01c6aa6e58d07c65a48355ccc3111615d7948fff36825f86b4ddce0efcdbbc. 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/USHM21404360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f310c94e060dd06600259cba002c9869fd6e17acc62543ea3791d158d9c2da. 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/USHM21404361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb298496eb206904b6c141ae787e167b8534b7aeaaa9bbc16e8db20ad6dc45364. 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/USHM21404362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac95039eac2b7dddd38ac5246cadc178b88edc268a63793a778aec37e5ca7913. 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/USHM21404363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f33b7bfdaf3e2cf3359a1fced33cf21be446f1b5de196164bca5cf9f60302cf. 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/QM9AA1616119.
Camp Meeting on the 4th of July, May Day
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c4866e171abd542ced08f878bf1b411081af39db5ff36ca7185f5c2fd44bd0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QM9AA1616127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6214316c7659f616fb6395c9febc3d4bfd967bb1446c45e6dd2d5b6727258fd2. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QM9AA1616129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76466a91c5b3c6383dbd4135143a91c7f0382235ecc99c6056192d59b7e52930. 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/CA72L2100010.