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 0x307bb100564d0d801eaa6b62c55df6ba8ca6b93d3935ed9cb71064591326033e. 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/0f06ed67-6e96-4398-9b47-a4c4ed48ae6b.json and https://artists.proofprofile.net/proofs/artist/0f06ed67-6e96-4398-9b47-a4c4ed48ae6b.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 0x3aa5bb11d673e0c396cdd5ed8586de0170c3d224ea1caee49e5692480e1325e4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DKKN71703101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c89a63a64aee57fe1432148505b5338a2851a8347138e09949c5909fc9c606. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKKN71703501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab0e2e15027266b97c3833e90e5f057fcf6da54cc94bc60fafc29d12146b6f. 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/DKKN71704103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1e7ed983970acb522563d888db136caccb1da5ba682a45d72bd7e606e4053b. 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/DKKN71704104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526674bb696fa6c82c8ad19d54f2949ee13f29c4f4385d598e1ecbe0c6b51161. 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/DKKN71704107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90683ae2cf1b23ed875f3a9972e6209842e366ddbfaed2e4da52eb811582ac4. 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/DKKN71602901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7637e085777ad952da4f93c1491011e9123b61a0d48b22ec1fefedff56f90cc. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DKKN71704101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe089497041e53ef52471375e5650023721337de5be02526374d04d622440cca0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DKKN71704102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185bac3922c0181df839764cf65c5a7e0fc65354e47876b9fc7ee9b2445f4b77. 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/DEA621800409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ca182ba9e458cee1269bcdf85c74fe76a510d46d4cbc3855e9b61d6b4b0bc0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DKKN71903701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a3bf79906fec9db8b8266ebdbde29141275424329a1a5c5799d13139abe4bf. 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/DKKN71801601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1435be698f1f9b342d23d63aa9382999c35dfac8983ec8104f3ead07aded5735. 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/DKKN71903501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40d78190bf686d0c89d8cf56e0c801450321588db39f33274281ffaa2d36960. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DKKN71903201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c412c578e3150f3d885eef1d13dab82917b0e89a253e74cfdc0ac003602d7. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/DKKN71903705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ed1171f2f1d3f189f1e50c06bdef8cd44ee3089913a9e02c4e1633e7a686a6. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DKKN71901801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b77b7cf380a010f57ea688c5663a2df25098e43805b3943ab9d5bb1d663bb21. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:51:40Z), 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/DKKN72201102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7c3f2dd21a542c6cb9cb8131de8ecd97c1b297dfbc43243c55517c126aeaf0. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:40:03Z), 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/DKKN72200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62b03d5d0b33fb44822a9860bbc9fe7b5a825999583375913f64104b70c72d6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DKKN72100501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4c2f6df0ebe0b818942d66d3aa91ef5aaf953678ff2eeaa79511c607f7e86f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAS2378114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d2c09f99543dc5fefc5323a518600cf1fb49fa015cf9b63c03c59c2585b4ef. 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/DKKN72401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d50ca36147bd86312e285137057498da085f33feb2dd637f7ed68a2784d362. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DKKN72402701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe089497041e53ef52471375e5650023721337de5be02526374d04d622440cca0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKKN71704102.