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 0xaeb8f118d430a78d9d60188a74e396bdf3fec5cf2f9b149424cd1edc5fb5567f. 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/16539c61-6991-4aad-95a9-e4f99009f2a5.json and https://artists.proofprofile.net/proofs/artist/16539c61-6991-4aad-95a9-e4f99009f2a5.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 0x0804a9b309afae3e8d47539873164ba8920535714e96aa8815fefbaf3dbd6d5f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA2Z1310414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dc4789615296e630537e7af8f289cc74a016e44bcf22c685b7b7ea64bf7a8e. 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/USA2Z1310415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b754d63b33437ce69d1ee79c4f4c367419256f40c1800ffaa29604849d6885. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USA2Z1310416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df99d88fe28e287c5dfbd6feea96bc58663013c5418086dffe6e70760be956b. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/USA2Z1310417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2490a37001f78c62f434fcb6b36ae34279c0233b21576e9b637aa9c2716802b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USA2Z1310418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4859c39b1b101c7a3d138e78f5fa961088705d8b6a8dfdaeb9cd439707820c. 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/USA2Z1310419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb4a752d22fa4bf8e40572609778be6c58543dfe31464a59392f9ebf730b12. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USA2Z1310420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d353d3fc9f2cb9b13fad6a0b2b0609c31f5808ebe6f0f9817437aa1ec92f9d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USA2Z1310421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb0746c96da194f4ef8807d4cb202b7eeb6b12e8a29fc0a321089e65cae03fe. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USA2Z1310423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65757e1f006a4790855bae9a70c6d88bf39891d0ec304c3f331684c3203aff95. 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/USA2Z1310424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5994bb11147c525d7beb790ef42e841e88e91c9e27c00c05e383e19e69c8e8e. 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/USA2Z1310425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd75fa5d55ba1930fc6876ebf68685b0a75b94e63bcb6f3f4ed9bada2566b13. 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/GBCEL1800614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74885ddd501b0898a5f509a72ea42dc5984053ca388799d980d6c3c8119ac51. 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/USHF31408105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971577b36b4a6673228a378297dd6716778ed745acf80877061eadd342784751. 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/USHF31408108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65539467e840ef3aae96b9f04f46de33e4301d28899e9940456e19e426a5cf8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHF31408109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6d6ed346ae1be7f375bd73e935e64ddd539208d93c9f6cce7293e6a03a5e99. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USHF31408113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccacac35e9c32d9b568f1918a34d84c5123322b4d5e06f64844d1d52079a475. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USHF31408114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e88a5f9eeb601b001abc871d68e7b11d6c326b02cbc54ee43026481e8f57dd. 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/USHF31508801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf469252379d8a5698d00637a1837e8363f0ccd2c920188ecd1895e846986769d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USHF31509112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f90989abe1466fcfdd6ff10296a86af8732f2bd97e35681d7bde104bf60fce3. 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/GBCEL1800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426c804d0bc024a89bdcfc2872164d7274052cb92f4d8b40da9ef0b9a4ccdc07. 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/GBCEL1800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe130cb7a2df7f277532c71bf5aedfbed5a0771a6e60d58f82dcf22a6fa4f7dc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBCEL1800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3121fe51fa4ef86abcaad2f18d1543fc9f4ca6832b3ecf2a980b82284f8ed23. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBCEL1900706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92a3b2d9a4db65aa2c3da53d8c13cf1782070c6e3d13553fc65db777f03e985. 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/GBCEL1900707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7882ff6b2fb0a0f4e88b4023c0146834bfccf87a8bbf6f1fff0051a0483d77e8. 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/GBCEL1900709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3724845df20145953502e308f7c66a970d660b3368e1537adb5a93317bc6009. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/GBCEL1900711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7678dee6747c7a31f5b64bcc244cbd336a367ef70d0d00bbd95725948763867a. 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/GBCEL1900712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4222f2fa3d3425296d28521ddaf7bda8acf1a3a6c9b360109a08bcb50c938d79. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBCEL1900713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d429e35f4f81fba1baa3234d01b090df63b9f256f16956732a021b0a278f5b. 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/GBCEL2200622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb362a84f5837843b1017befc2c0accc024394939fbd9670ff074515cf0790090. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBCEL2200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4bd24e4f5b6e1057e524c7d7d5c0517810544833e1e8a48ad28c96a392b020. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/GBCEL2200627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcbd5ededdda6cb7b7d6a8579fcc5716a55b99278f69195b557ac454fbd8e32. 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/GBCEL2200629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3da05e434ae66f75028c53086361ff36eef22e549d75b379d0b72fc6b8057a7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GBCEL2200630.