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 0xc0b5663e3799042c9eac768be52b6d22878a20bd9401cbf8e0ba4df2ea4dacdf. 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/2dfc157a-7e66-48b6-a958-a8182e2785cc.json and https://artists.proofprofile.net/proofs/artist/2dfc157a-7e66-48b6-a958-a8182e2785cc.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 0x323d3e031974dbe0028b0d7a6e040c2ac0a37ee952fcd3ce736580778133fe10. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MYTM11900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c8109040df4a90a11ad126739bcbdcd594231a5fccd1ee17cdd2233bdb3c7d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MYTM11900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097b7759ca7b4671e94eab89da12c97a66f67efd3f5f988dec80b0f9e28d8be3. 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/MYTM11900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86571c4f303e949a8a53107dca15e8626f0a4ff0c0be3aee326da70132e9c451. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/MYTM11900132.
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 0x23727708c4a80045c48d87ce626f4ffcb0151f596464d60769b4545cc00fba4b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYTM11900096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e1962d6380ebb95f9182da6c24868130c18774519d1ccc2e99286f5364e432. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MYTM11900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dbcc196bd0295e00018a4da5e51b5c06db58bffc210b563cd8b0e4dc6beb46. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/MYTM11900094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb426855b0cd22f19582dc820547034792514014e2b571e9ecea975b6b10dccb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYTM11900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dae3068703076ea6c0ebdcc463cf7b61fa0ca84230e914096a403e2cd15247. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/MYTM11900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12578c4a8014a90957aa296001e24a5ef8f91a2e259856c56d931aaf078ac5db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MYTM11900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f1e34040c0a4d83fc16f64a4becb6f8a96b34482ac6b4e78c88458fa0a8ff0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MYTM11900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7921e92fc4f68b976e23878e9c5356e4114978f6628c69cc9519264ababeb23. 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/MYTM11900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d25974bb410d86eaa73eff0e0f6f1a41007ad9bc8ee048e6c0ba167ea92e3f9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MYTM11900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b08cb9ecb02b3fb0bd0fc5f4b05c0978dd2d6c39aa1b49247a1813df1a30814. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MYTM11900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe82779776c482e56d1857623f20c5339787298f237ee02696effe239ad3d26e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MYTM11900086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1764f30fd6df35eaea3b838dec12d9b6714dc982a88a2a5ea1a9fad3e8ed6a3d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/MYTM11900087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f445257bdb797f5b6d041d217758c19bea8a3b492f23c6fc1279b0ffcf4d798. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/MYTM11900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3f1d0c721a4849dc28ae08b1f66e051f13efec3b3360c048aaad3722f5456f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/MYTM11900078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21de70c0ed9568ebe8a05db715c4062e56f1c3a17c1386a8f1ba498c356c49ad. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/MYTM11900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ff3c6a9d6f9b40b374953f301d2b3756a32ea0a204bca7b8ca13a229d4e707. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/MYTM11900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d2dab87570f5958260eb5f560bec347c8be6757521ff0b058a059715163272. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/MYTM11900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8034da5a5629e471297fd4068f5591597591185d413c1f78c50b4546f0b0293. 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/MYTM11900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9278c05c60ec4196fe07ec1595031c0940bf60cf30df49f5ba93aac928c350a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MYTM11900218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5182d41cb5b0c12a4178391292b2103f583a5dc00358dcfcfb3b3d98528d726f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MYTM11900219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1d16ce2163b039f05ece5f2f5766cac1ddabd825a48217c6f6ab0cb3e44fc5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/MYTM11900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f84cfc8d4ac99578068a9e2de97685e780adeda9ff99c8a7aab9e1777394c3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/MYTM11900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d87206ac0ef61ecdde7378cc662c16ac4845812dd0d98389fa1a73f7db46e3. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/MYTM11900217.