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 0x18f92c511c9b525caef6240ce352d08a0077b73a9ba96212057a81e99d5c29f9. 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/673070be-e1eb-46b6-80d4-7ec360e2e19d.json and https://artists.proofprofile.net/proofs/artist/673070be-e1eb-46b6-80d4-7ec360e2e19d.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 0x7c84f7c161513f4a0d135eb4494995c03ffb3725e0a9506e0e3630fbfb59f67c. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZHN71927508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baa888d4c18d2d42bffbbc46430c17e3e63940b15b1e2bba47654c0cff2994d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBRKQ2038537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ccc6bff4da8e6179a5ca62968cbf8e8b74414f9991ef730b485803f99d209b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBWUL2116010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9846ca1f4c49ce603d72004aa9bcf92ba4504a4b6df45615d0c6d7b1810fbefb. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/GBWUL2116013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e0f78c27f85489cd64d117913c47debcb39eeed19f29cd995de985d5a59c06. 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/GBWUL2147171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a335eaaddabf87deffe75d3ca03ebae28dfc8272afe823052e2c7b332d587f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMDA72142506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a375ee30e9ec8623b2333a7d1b51ee19697ad9b9d2a5b3f23a8f4420e5277c7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBRKQ2226426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb06c56b58c56205ac55f6f9a0ce7b9bd7e9c9a831b60d2ac24b4bc6bcb07f5d. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:05:29Z), 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/QZMR82200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b88672738d34ee3523d4c35f3fe69daa821e9c610844fd559321bd2ad1dc7a6. 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/QZMR82200394.