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 0x3b374ab9a051f0ca2ff194bb59f94e5a2e1d34bf3db74051a151dcb3e06b2c05. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4a8ab10-f425-46f7-9bcb-282e252c125b.json and https://artists.proofprofile.net/proofs/artist/a4a8ab10-f425-46f7-9bcb-282e252c125b.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 0xebf25e2acd7a7e6f7037d3bfc2ff4570028b266788df7d0660e773d2bfd5bea1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:39:40Z), 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/INS920600218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6687bd094d549a370d918368805d0bc90d07047dcff0a94e206d866aa74e40. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/INS920600220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc11455e4237ba90db4c20b373f7c80fdc723a27a2c0bb5e720c1afb89a3325. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:46:46Z), 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/INS920800386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1201173fcfc359f88d32c44bc893b75853d39b9835737b4ed23cc73b39ef411b. 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/INS920800388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67348b01fbea6d641c44407efd62d11dac62bd6fd57b77e8167bcc73cd0fd7fa. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/INS920800392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba77d12879f7889d6ea8cd3f74757846c2235f53d40a9696fdc6c0ffe9db09a4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/INS920800393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07911d3f798e2d89078e4857c5e0ccd51928203ee31c3b628cb43458bf13ae8c. 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/INS920700283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe9924af2c73f020c1a46f8ca57cc813509a8dba457bb17c5a797d8101f56e9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/INS920700286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa555b65912f3e0ed6c4e3961ff99bca577a802b7a7e0fc30c9f42cb17964000d. 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/INS920700288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65efb0ff705e1dc1fbe81fe3901f0e0a82219917be874c68447627c5e1fe123. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/INS920800409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b559dc7c27c8751f3fe209abae65f7150f18f5db3de4e0c2db27771c92d6441. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/INS920800410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377ccdaf2c2342da0bf30b914bc48043c57d3111e6e551936804471071847cef. 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/INS920900789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd69ad7fe27ee4bcd7ce29bbe9bf60857048b4666ee47d94320249a16f3975e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/INS920900795.