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 0x60fdbea232d0fe1e0b02b688ac5c527bb91415799f858ea2a57f451a82f79b53. 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/4826aba3-195e-4d9d-b55b-bf16c273be84.json and https://artists.proofprofile.net/proofs/artist/4826aba3-195e-4d9d-b55b-bf16c273be84.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 0xb453e1ab890e803f2c87e1d3fe8e364ebe1f0ad2a6b3eca5a517ea7b55fc2592. 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/ILTON2507349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc21892cfd02457008bafae7f9f4ab7059df71087fe5770412f187948c93def7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ILTON2507351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799d049ea7eb956bb7c23e3fc5bfcfd272d88d65f8f97201630cbe3e4176685b. 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/ILTON2507352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49baa2c08b5c99315aa798ca622f9773e62bb5d8448399f7c41b53577913b677. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T11:41:54Z), 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/ILTON2507353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5029ba87d4802cb7dc837c48bfc51ce825e00520dbc4178342ef37a8b4128c42. 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/ILTON2507354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014b8759c7315d311fdb916901a13a5029270bc0ba4d0673020c23f6c87a2971. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/ILTON2507355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1e3e120d281da95e2947de87cdce3661675f5e178ce3c7f6bb8ca0f78706df. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/ILTON2507356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf681c3dfc9cf5c3a9d8b1548a6abed7919c3ca72f43774fc2bc8689c50932412. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ILTON2507357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3278daad7857fe34b297e3bdaa509a9ed008ce581e294433a72157c839942dd5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ILTON2507358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b1df33f72f8c3c8b51e3eaf71c46696abc36ec1d4ffce0b46eed0fcba6a58d. 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/ILTON2507359.