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 0x3e4cf667d831396f57d56c1a599efa4f637137b9e212ce71a5cde15c0ed6435d. 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/2d854f04-1151-474b-aea8-2b7d2d7bdd1e.json and https://artists.proofprofile.net/proofs/artist/2d854f04-1151-474b-aea8-2b7d2d7bdd1e.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 0xa6dee81ad74b10da6bbe644ae4275d3a8d4cf2be72610230921d684898ad7bd6. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZK6G2048021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae16776165c8f9edcec4a7925b2dff964962cbd9b40e2a28f620c5847dc6bb9. 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/QZK6G2048024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfbc3eb783efe52d03decd9412f65b0cd54ef83940ff3bdad4a522a6bd8bc9b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZK6G2048026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a514c7f04275cf5fa7a6e705fce624018509c03e2c4ec5a3e63fdd26c4cfe7. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZK6G2048027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb7b4068599a349ccc7e9bc621d81d80d74e8d9377bd27aa983f1b59abcfd6b. 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/QZK6G2048029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8e4f699570ec2837472494b29579e1a755287af11034f542f500bea72ddd42. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6G2048030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3d2a5cb85859e79edca17df569341e3817122bd2c9bce9e38fb0c6e8cd1d86. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFYW2124176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2c564e34274eba5b7a513ee2b690b1161d4dd2fb466b6e3d050aa4031ddc76. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZES72126620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b5d76117fa57b278623744cf0dd058023e7a51dedf59b2e4da2347ead4f5ea. 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/QZES82174458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe991f03ecc12c2f83e3d9ea6ae04c27e2e7c4c25d30ea0fd6f8cb742ea7735c9. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZES82174459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab17f4700ff764e12c677560fdc5de512679d01ce9536b9fba3c4b54acc93690. 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/QZES82174460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7991e2429b142c0fd9b4dc8cc8b999ef216bb212b5c0833010f90919e692961e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZES82174461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7687761ecc7d5db266fbaa41e13015b43e0e5284784a6dc0b5566998b484a67a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ42224756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9811e4927cf149eea8ab522c8c1fe3ed02368928813433aa1aebfb0ce4e5130a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZRP52164869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2979f17fe5df9fcd265ce838c65fb37967741a89d08fff666ff9196ec18117. 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/QZFZ42224761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2922f08fcbfa11e1b41a091f2b449f2ad958350a1ea074344f56707b741f009. 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/QZHN72393256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a70c74d0af4929e4bc89788cca38b6cb8a0dcd3aa1ec4594a7b5a2f8295f5be. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN72393258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d2e27cc03a0bf036cec2e41a52e4dc87b3929e81243db8c8ae84a959a5818c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHN72393260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8553782cfb174bc55db94008a12e722990344aaffcdd697c4e9b371eda93261. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZHN72393261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54978887db9fb1a4381f997096504e78f1504feeba8057ef863dd13d5826b0d2. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZHN72393263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62c91329614607d5f6c4b61c1d7e17cb94774cb89661c45b9b546631558892d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ762491798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01e06ad02a065e4cd94d062ca50f26c9c8771c8413c32ef6d0901d2f5509d5a. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZZ762491799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9695d32f4bbb48fe7d49a4291cb2ea1f91f2c738b83c3b5aa4650cb5144d310. 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/QZZ762491800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa1f5db0678edc8dd54ac87d9680011282db1f89740fe00809f717e033f69d0. 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/QZZ762491801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e04b51b7b1384ecedca529d4f1a63db964375e81e871ee7d079ee136abf400. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZZ762491802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9234660f0e009d3e52b0757b29f2eadf97b4cb1bffbafacbf24400dabbab6ab4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZZ762491803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4338abdfcb15a1f6faa84477ef2a3107e284d7aca55188c8aa7a6320581dbffd. 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/QZZ762491804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f533c8dfd56b8190a0232cb387662a383d33e76fe58a10f30af97db912eed8. 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/QZZ762491805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbe7a5d864125fdd015651bb7779a0cf3f838ff0f4d911084423a9c650ea62d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ762491806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfc003870e2b30ab4db8cc171c32b480bcf026b4e625a43fbc70a0c1ce9bb76. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ762491807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d69160acfc24c3b30b128daa22c4de35e384e337f0ca5a89579081da77b627. 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/QZZ762491808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1742f4867ca30bb322ba85cee0cf5e0e2167456646599e4f1babdcc7d1a2b3ff. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZZ762491809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951b49a7c7cff1e666c95d8d853b7f8e3a3da847767a307cf11cd63bbeff128e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ762491810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf727addc59eee4baa53f298dcdd2fc9470c2e43f66b2d71662b0fc33b1493de2. 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/QZZ762491812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da200bfc1ac15305ae26816d1d396fc316da9d4d737b0a2a8413757f798779e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZZ762491813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782165d1c30af1fcc2f4d4a51074a154332ef8960b2f71116328f72a77027663. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ762491814.