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 0x8e59218e777de7b482c91aaa66074dd1681fea39f35f5263d11099cbcd90e59c. 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/9e5fa5b3-d44e-4968-8c1d-d87625c82d8b.json and https://artists.proofprofile.net/proofs/artist/9e5fa5b3-d44e-4968-8c1d-d87625c82d8b.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 0xd38cd7baed88f0fc58e2a41f5f16af5d24c099c2715f64427350963a27feb9c0. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/COA3C2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b58e08ce38d4217dd9bbc83d9dd9a172cdc33923ebd86283e677e609ad8ec6b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COA3C2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c60301bed9e758edc27ae9f011ee0484bd7719224e41aa0ed87fb352c207774. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/COA3C2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb924b9df886043148ef09362b159603847ea9d0a92c91de66326e9e667e3130d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COA3C2300033.
La Vaca Lola: ¡La Diversión Comienza Con Un Muuu!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8118d51ca86d92232effe4002b12c6c1d96bc0f2a84ace13ce1a1bf1e7eb8b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/COA3C2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498f069db8be2eb626dc76c2a8c99b7ba9fcb29e6fdfe4d007526d7c8d9c4111. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/COA3C2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38cd7baed88f0fc58e2a41f5f16af5d24c099c2715f64427350963a27feb9c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COA3C2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48b132077abdc99951095e5b7e9124b41dd2c35ea1dd782de30f112b817a981. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/COA3C2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ea386f9262b265fa7edd29ef1a19930feb52385cf67dcf62565a30f397faee. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/COA3C2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a211fd47db43ba731f969fe7c764cf6e8a60eb1412812b65443bbc1dfe53c9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/COA3C2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc42efafc940a73893bccc18bf996c57ef741d16ad436e9075126153321723e5. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:38:32Z), 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/COA3C2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787610f578eb7c25d065f6ba89a9180e5a2c7aa0c19e9f420f5de77973a95831. 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/COA3C2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8b9c51ee00a1b216432248106dc37e454e9620c8d8c1a01241cfdd47d8b6dd. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/COA3C2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b7dffbd321199951f4faa3f9641c8c3f537fb9d49e5e2166ecfc8988c428b7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/COA3C2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f186c3b7c764e04754df186a3f3e850f864f344f941488c1bc74dac01deac58. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/COA3C2400035.