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 0x97214d8214bfa481111aed46d0f9a22170deedb97a6d8f230bded1c213ba61bc. 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/edfcf31c-bd9c-41a2-8d32-d68127c4decd.json and https://artists.proofprofile.net/proofs/artist/edfcf31c-bd9c-41a2-8d32-d68127c4decd.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 0x1417c03f1a2b9f888c36812dbb8a857a444cee72bc8b87cc16b6e3446434e5e7. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/USLD91721423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f53149c34a261a0ed2f2e283cbf3515dbc672d412c275566c0cc24844449cd. 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/USLD91715518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35dc3e0cf76c0aa17acd78f687f3faf9ddce20c658097f64420cf7890764ff7. 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/USLD91715519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ff540e2c1b7bfafa4602bd1c7d85066302fa8d121f74007b0f58b39c03c85a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USLD91715520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb638f3e74b100df0192fa2053617aef959855c59864a76758b1a4848741ce09. 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/USLD91715521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8d56d4b0f0876e19e69f6dcfebe61da9d4a3ac828e7255f42d57968c2df0bb. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USLD91715522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fcddfb0fc30cabe686110068ac4cf3cfa3fcfecd74a75496f2ed74ad224f00. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USLD91715523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41be381430f295b78cba35d98ed97d3c89c0a7a322b0d3a2958fdda36b5f2cb6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USLD91715524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fb262d77a92ba34ba5733e6de366b67499c74eab389f58e218aedb83669706. 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/USLD91711313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19857e868335a4a24c51e3e4d56814d565bfe3a07167edf002c894153287a9b. 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/USLD91711315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4466b9f71b66f8acade7f0c65555ab99fa44835657b58a5099c8fb3ad55f37a4. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/USLD91711316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7008b3e8a63d9ab20a736ebc97cc5b0bcdd7985147258e92f50f7e67153cb88b. 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/USLD91711317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3681fcab3a7f16a14bb0e70cb7425931b9bd93b5c3f5563b9847e4ca34a06f19. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLD91719047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86763df1a72e43334fd35781dc9a828314b9eb9e171a04cc1b15d940be6ce6a0. 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/USLD91719048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dfcb494fcc259d03b76a1e5ba4113eeb0b711692bec4ea8632182e0766eac3. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USLD91719050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fd8413bda0bb1b74c6ede40c4d2e0e652071fd397ba640541d59e9a4962e27. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/USLD91724976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513ff97176cdd6ba5fd76b0165024f6feb07399657021d98292c992c08c08836. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMVZ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44010ea3c92237b305d40dff3267a908cb662314637f7415f03653f303a3aff3. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USLD91735515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61497730760a5dd76d2fd83d143b84f1830a910219c99dcef7e6e22f4b4ccda4. 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/USLD91737273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f3e9ef0136e1f694df8c401253b579bbf2e719dcc87958a7983fffa0f6a0b6. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/USLD91737809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe13b031f184e57612da206cacdcfcf41669c69a7c18085f0a26c281aac5172f. 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/USLD91742041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483e2201b92e94f335270d8c7b4122f1f94c426aff30fd3f536fa457888c5764. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USLD91742479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61497730760a5dd76d2fd83d143b84f1830a910219c99dcef7e6e22f4b4ccda4. 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/USLD91737273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40ec4fdcdc3b303f6f5bec6543be65e12a8b95d1cc56e714d8f4e18a2404e0d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USLD91742605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99142cf9368955d6468109d619e725a8727cc4fdd39e135a03d4efdeb3200732. 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/USLD91742604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75783a8a716ba34bb853d52840788fc01a7512483df182832c9c5628fa8a2ebd. 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/DEXC82300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5deb48c450b0ea6c95ac95360bff690afe74273d711837ddd75029188a685e5. 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/QM6N22479970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ee8fc6bdde343ac9e6f50489f2df5c6ae44b165053861ccb303bdd34e616ff. 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/QM6P42431219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6c1fa14b5684d7fad694a9759bf41d4986098d044a3902f04b4026a04aeb86. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QM6P42428375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d7b1649f84a253bb3a88254f756d0927f3614e78f9922c2c0a62b75fba6259. 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/QM6P42431224.