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 0x6862be9c12710e01715c66bcd8f6e878194d28a6b900bc6439a272ac17214561. 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/74cea21e-9db0-42fe-844a-7f23d587079d.json and https://artists.proofprofile.net/proofs/artist/74cea21e-9db0-42fe-844a-7f23d587079d.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 0x286eb498ad558d3c5dc39e00f2e040e91a81019b227971a543312357f7bbab7c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEA620600490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607e2cdcddba7a1877bc05c704f42c0c17eea7400a3d70d2ffa1484778196d7e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:40:17Z), 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/DEA620600491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784fee8586798f6ee8d7098b2b768faa979ba7c7bf1a5754ef39a25621bc3fba. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DEA620700612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf06439e004de14988e96067c5ef1ec6eabdfcb41ae6bfe7b9228d753592bff. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/USLKK0700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2948df12f058740c3a31fdd70e236a6f4e05aaf061dafd2160dbea6048374fb. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USLKK0700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ed357b0e40952a1af83419f1261682471e971669fd2cd4a2c3842c62ec4b84. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USLKK0700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8938b1c3615bb555bdd855ec89107a9a0103ff6d42cf91fb6ed4eac37b00a5e2. 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/USLKK0700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bba8c78a562bbe38de949387697fb9523fbaed6b3f811e2a17c3512d1be572. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:15Z), 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/USLKK0700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01adbedc78793b09dcd1fa8e0df0435e4b46dadc74f7fef42c2e570d7debcfeb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USLKK0700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816738fb43865e176ae3ec1ae39307eee9bed152dc969ec58b1096cd16f9088d. 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/USLKK0800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2567257d1491ef2c503dd6f342841b1c27972666c92840bc312799fe5aa4d2a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USLKK0800003.