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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe529d51d6d1dda50891a0f55592db082cc8e28413832c78b38e7ef704e957c03. 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/ef9f6174-11fc-461d-8eea-30a2c33b3435.json and https://artists.proofprofile.net/proofs/artist/ef9f6174-11fc-461d-8eea-30a2c33b3435.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb367b78b48b1c72652feec5490be93b4ba98c99fd56f495201238b7e776027b7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEA340601691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eccc52b9d5951389619a80e1f6f109dba13d24ad6891e1bdb2f5f4211f78c30. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEA340601692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b175ed0dfac5050de7dd37836b3ac7b4d17d9c71f59e10eb57b03ea1bf0d24e. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DEA348500464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8203b389a1a7585b6b28c5a7eaaabf40c06157d879fef8ed37aa5150b55a8ae1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEA348500457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa535aab772d33508339e64fac4b540667beb0c7df70e1df44e553b7e94859b42. 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/DEA349200468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dce8d37adef8c453ab3de8080646a811b37c2b3a0b05b7469f6ab43ba8ddb9b. 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/DEA349502304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8146e67af414fbc6d626dec06f2eab5e7a803cf0ab6357188d0b76be64741e69. 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/DEA349502306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d5e47ae6cb928677148bb970311fadf2704d904fd95c9da0359f2562f9bf4a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEA349301435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342f07e1555fc6031e432ee85c71bae13f938a958d96fefc449f6bf7166103be. 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/DEA349301440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0341dfa2f8f16c586524ea2fd0df311dcf96831eac57f2975958299f78352a05. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/DEA349301442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6375d844c7c584b9939580b52554362719673cf24fe075e6946adc33aceb03c7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEGW90700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b09434da767c7cf7167be0925d25fa1823d2578df1e3afda03e7e8184f7bd4d. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/DEGW90700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ce93ef63194b59b78e3ab79bfac3541a459986fbe6a873c06e2ef52edbf54b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DEGW91600062.
Break out of Babylon - Love Dimension (Der Königsweg)