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 0xf3f86bbaf382c5330cc9bba090f005dce48d50819e298b5fc0d40ab515b3091b. 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/ec2ab846-e906-429a-9c65-045171e34b29.json and https://artists.proofprofile.net/proofs/artist/ec2ab846-e906-429a-9c65-045171e34b29.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 0x257efc8c60276bf9b0f3db9ac815b9a56e81306193e6ec05c91e04e310fafb31. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CZBV70100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b30a9cbafdba72794a8109580a97b26ddcd34b2e03487a4431bd98d626b058. 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/CZBV70100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d3ceed1c54855abad33d7a72b07e8e06628346a893645e3498aaccac57dddf. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/CZBV70100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ed42cdd744808b64b762811a492a746f36f05e15e195238ce8635c6607677f. 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/CZBV70100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e27d0a7883db961b33b2d50d6fee687cbf8b89d738b6549849e900b99d029e. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:46:30Z), 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/CZBV70100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e1b09c36e53d9b7c85e5de9a58fb4b559166e78cf27d40149a0fdee6319509. 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/CZBV70100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddca2eb8175c08c440a4cf6e348c9fa06016a342333969799749289cf0216bd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CZBV70100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2346d242cfd95fe25ed520048c289e2ca2518b3bd87313e3fe488091b261774a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:59:58Z), 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/CZBV70100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5064d7d6cac1cbc71372b3e39039c99da7b65872a367f0dc039b8d72fde8661a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CZBV70100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd00f3f70bcc7be850e4961899f8589c077e71687e32c61e9e8631121bca980d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZBV70100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5589696cd77b6d3b6e50b9cc65af343b9d7538f38878a859f30b733c93a2a6. 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/CZBV70100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b821828b64ba5a5ca7b29c537730e0993de0a13d76dd97539cab80d2f61b736. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CZBV70100067.