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 0xc4a68254af341029ce1019518db1f498430ccc12c30fed47655ae25fadc8fffc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3562d75-bbc6-409b-99cd-cbb069362995.json and https://artists.proofprofile.net/proofs/artist/e3562d75-bbc6-409b-99cd-cbb069362995.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 0x2b423c300d8ae8c1bc539c13cddb3a5fffab312f35d93850cc5ebec266e21d4c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:17:31Z), 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/TCAGZ2388384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5747789894a578c27f43b8e1b898f8141e0e14a4f491ca33de5cd90a1fd552. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAGZ2388397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3de5c100d2e0ca5e9aea6a2da4e96424cce560cec3778c1e9d56c1ec0fe6d9a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:01:39Z), 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/TCAGZ2388409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507df1176ead92a94f9dd68197a2dd681267dbfed32bc4b124b111f5da610c9d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:35:42Z), 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/TCAHA2301414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e41c25d25f476b22a340918fadd0c2539f831b383f7ab7b5f7960bcc73f46da. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:51:37Z), 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/TCAHA2301437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b716fceb75dc846073f62eb1badb7f86975598f2a87c23678214c4c6c45d8a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAHA2301586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4286f85758c35b541dd47e6b5865c1f06661c8a591231663db425ce89a7b02. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/MXF149700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399996d3f87f623e82511fbd899644389bd6c092b379fa52ea4c08c23d0bb776. 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/MXF149700124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fb0eafa195114b0d65e84278fdc2b9494487136b00c4f9e6a85f4c32168bfd. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:19:43Z), 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/MXF149700126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9ecd6e2aa61276068623ab720ec2dc153e92bf25a6c4397c804985dace9a2d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/MXF149800446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ab81a6d2cc0d7dc116a6235ccbfcad1f870f08b142d92ec326eeac740e11c3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/MXF149800448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e549c6e5de36d67720432a146a990a0a6e5bdd589301c828260b1ef5903a7c4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:11Z), 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/MXF149800451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975aac3c3b0c0c893d1ad7c85ca9e8b1be3e4e4ed6c37054b59f809e8f0c9625. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/MXF149800452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613cfdffebddeb80d82aeedcbf654db4802614d14acdda39aef1df0e30ff7473. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:53:53Z), 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/MXF149800453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ed0d84c706e4743b0e639a5f74a3825efaebaf186fd6b3e6ed5893465c144c. 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/MXF149800454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358a204e4ade19f06f97e468e02912b434bdf4561be59eff4403752b843eac5f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/MXF149800456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88f5cbdf2cf2dfc0671fd41d01fc75b183d3ec5176e6d44d0ef6403da28c120. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXF149800457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ef7c777e526dc10654b32b8be9a55411364a65b40bd73da360c93047946f37. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/MXF149800458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b85aa1a310fea55e615bc5a64ec6b7c3f40368472dfedecc222b14f2e07815. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXF149700127.