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 0x1876cff31ee25b636073c6aebc6198bf18e15c6f230e4e92fef61feefa6535ea. 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/1561e37d-8b1b-44da-a55a-9a3fdf131be5.json and https://artists.proofprofile.net/proofs/artist/1561e37d-8b1b-44da-a55a-9a3fdf131be5.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 0x0bef248c0d3f26d3dfb5c729e9dd58fa44eb6d815508412b53483391a4e0bcb6. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:54:31Z), 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/GB8KE2329471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efc5dd710062523faeac4baab58e12ea9841694ccf97e11afcc0f4bab4c62fb. 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/GB8KE2403028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf08dcd0c87e96bd04d2e391889acb9b953d3068a61ae9f2b42cb21f6b8e05f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GB8KE2405774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cfa9751e6d134b95a21275ae90a2b46ca9b9ab30dfa75022c4dd9f830dd557. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GB8KE2406891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7cea581c51dcead338b8d00b9f7559016a891d35350778d757ee07ad08c35f. 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/GB8KE2407780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544e873f08eb36618c860b2ed6e8419795f2b2464218c4ecae607efaff09d21b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB8KE2409784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0cd5153511fdf6cabb2cc3185623af7c2219d71907a24fbfcd4cdd3e9d08a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GB8KE2411690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bccbe7612a2ce4ce88c5608a25df0149027750441bad08d89dc472178cac1e9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GB8KE2412386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59d801c75de5a22883c7af6447e209f8d617d7d1b2a5197eec91eb1ec6d610e. 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/GB8KE2413291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd462f56a7407158d1a5df34103e56ec1595bcdd363b036816b8a263bfc98d8. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:43:26Z), 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/GB8KE2414252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bdd13bca8080f5169005936948a9671d5bcc92fc7657aa4f177b5e0fcc987b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:02:20Z), 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/GB8KE2417392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf12d3bb33d756a0200d62fa81ae3f0943650ea4385dda24a9d590477baccf8. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GB8KE2418536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc40b95a21f9951e7af170062e708b819a55e2551336c2e074759f52da253dd3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GB8KE2419493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef8804618b414962787477bbc296dbfea9d9272255141b0856db272dc8e4f4c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/GB8KE2421316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b01ae2e3d531783294d95cd906ba98be2b650ea6313fa96e99c535f46222052. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GB8KE2422343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f68475e5c1b6ce7259c4e2a59a7c6e9e47187234081f8bf365791ebb7e19ce. 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/GB8KE2422342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231ab1f067f2686367f47411d7febb1252bd11e4100f6f468c5da295a8240b74. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:06Z), 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/GB8KE2423186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6711acfb576e34332f7edf099f1d5a9cf810a4a3c95fee564e5c3e61c3d2fabb. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/GB8KE2423880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91ae6e292da588d8e1f14e408c6fe3eb65dcaefed5a6ba463faf8a5c553986c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:59:50Z), 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/GB8KE2425222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c148f6a2b6826183538793daaed372222eae8703258df2f600069bb3c09327. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GB8KE2427188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8c1279225294d1ddc05290a10a78e4e98d811cf795956a3abba48079eefc6c. 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/GB8KE2427803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf6e7808f694861131026966a262e8a1ee07a4f7227f2d1173554ae7f19f2e0. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GB8KE2428522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a88f21ad1a96e82492457208f85a63c47802a0f05a3aee2e1835ac230cd926. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:27:22Z), 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/GB8KE2428953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ff998b4fb250590aba14be101085d7f2723bc3d2b9bdc014219bb849a589d5. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GB8KE2505294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe9702b739e685a6969adb88feaaeeb1ebc5c5283c8e38ce175bb283ba170b2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GB8KE2507173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e75c466bbbf80bce334c1f5170f50120a311109af77e3a18982088fddd1e29c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZVEM2586359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb1b68a86470b9d9b1ac6a142e9d5ea0735bcbb0377aee06db20eeb801394ef. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:58Z), 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/QZVEM2586360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae839c6d2fa2cfbe1153bbc44080bc2af34f0bdcb3dc276c3f69292f4b6e2e1f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZVEM2586361.