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 0x40007265e92b034765756fa6b1e2e504a669bf9c1d35a255cc32f74b467e17e5. 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/2e0cd410-605d-4fc8-8442-5c9854266a92.json and https://artists.proofprofile.net/proofs/artist/2e0cd410-605d-4fc8-8442-5c9854266a92.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 0x899b4abc079e323f950266e9cc13906ba62daffe5f1459e4efeb82fe133903b3. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/TCAFO2115703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40db67fcd4b82ba88ab6be1c786b5feecabbd1fe7294b9f10de267489807775. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAFO2115708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd07c85f17c6d4c39a1592a433952d1679242acaccb49525199142250c819d6. 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/TCAFO2115726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b7a1b2bb8e07a88a470212a2a647ab49651af6be22927484ae7aded99ff0de. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TCAFO2115732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb3098d22a5bf55ee4c7ce3c272418c16a8508919323a1971f9a807d101c3c5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFO2115736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1ebcf6fcf4aea022cc88d6da27f2f89220ea5a72b97268f5283886e10e7d52. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKPL2215439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a96f9a3554e7a901c5055b25f1bedc7d74b29419acd75c2aba1f1f53083406. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6P42347890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab7ff9fd77bf83466afa0e2395a43a84c6ec86d88365a29857da0fa35c8b23. 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/QMBZ92326324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548de184fd4b9cce9b660c812927ecb93a176e1650245866deee975a9a24bbc7. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QMBZ92326331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936815dbc9d6f3171e558188c87c7851b574025a05feadbe20b46fbed4d6b747. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QMBZ92326325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d27d5ca9c9799a2647124905bfbab43ea6bc3917a69d862c1d61cb21a76944. 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/QMBZ92326336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127f11aab9a85d1206ef4493d70ca4811b7524c4dc30622d2cfd04883e158f63. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USSM12401886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e93e12539e400270838175287025241175d4d82ec848c1b48333d1d33a82f91. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH7819500517.