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 0xd3b638b6d0b765ba47abd54231c02eabd9980dfeb0ff0b1394fc38a74d6774cd. 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/433c8ef9-a080-4c23-96a1-f01cf618c848.json and https://artists.proofprofile.net/proofs/artist/433c8ef9-a080-4c23-96a1-f01cf618c848.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 0xb4dec948e20e31a409cd5239a5765b1c8a73bfbfda1fb4abad45bb9030484379. 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/ES71G2103633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8823d3adf043efaadf84779ee9bcb3afafbab74a041c2aa7fc1f6930b5a5b403. 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/ES71G1509330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf079130cd5f27f40020a755aa2f167b1e620f2d963bf54579eae9fed1fbcb77b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES71G1509331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994a5e7dee5f3dfbb2b3f131d4a6d93074e0e4e2795434e758ba79b8046d8615. 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/TCADU1837597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ef8ada4ade2d5cbce2a05d3967d907c0c01e6cb65936b38df87750f0be4f66. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCADU1837600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6c310e96a270c6d0d0fed0ff71b66f3acbf8da7909cc60ce485d25738fadce. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ES71G1942288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cd18b40a38c3bd831c19b109cd68723b2161b2bf6db3803481fe32cf7802ca. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:46:08Z), 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/TCAEX2022921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e316ac97122429b18cddcfbf4816a3e890452a015a3569672a32821735492a. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TCAEX2022922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fbb09b0e5cd6f3b9e471c4f1e706f597b5c796038e90def1aa9a39187b407a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAEX2022588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cc3892a8add90f3026f5ef41bde4b34dc90d709dc1458109e51886245bc3be. 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/TCAEX2022591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971b27bf084fd8cad34eb7d04317468992a26302358692755a699cc2f21703db. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAEX2022600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efe639f4f2a22e984a53ec325e837df65b268aadd0eeab5d41e90e43ad13aba. 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/TCAEX2022603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097dc6a41236615b0a71ed15ac0737fd44c053a9833066309b6af51afc40e0fb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAEX2022610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f8dee1f82eb0739196f37a0f5df9fc6d27d59a581274ebf835e3fed1a1776e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCADU1823329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4b6b00cc3f42937ad8ef8e05b3e5c153c45afe73590b5b0f8f5c43feb52f16. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCADU1823330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd133b292843b297a996d9c1476cdbfc8acbe3d223caf682009eab8f61188fa77. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADU1823333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf148c3baa221d6633c26a8eaf270dc0df3e6b4f3cca79aefdf5301247a5e98df. 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/TCADU1823335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578ca465fbc569e2757d4b3cce6ccc41f19c3361d39dd50e96bb6e4fe98054f7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCADU1823337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9cdf214a38c0a0e8b3dfac199090161a2c5d58c1ebdb563e98523044d79401. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCADU1823341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60eb12b49df1bf612900fee2e3ee95026342ad045cf1004aced74d771b0988e. 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/TCADU1823343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8169d9e2f1b15adb5684a2f68b9c15cc8cca305f7982d978f540abafb8759f97. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:27Z), 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/TCADU1823344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b982f329599b77da2b1c5734d38acc7b5520c015df42e11adbb8722b80554a8. 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/TCADU1823345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb843e430e53d666daed1e314c80d1f3bb16d5523633df8b280ae7ca1b38fd8fe. 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/TCAEX2084226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed8c9eaadaadb08c0cb5865f6d472c36e1045c11faf43b180fc8bfde2abc4cf. 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/TCAEX2084236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7001e898670de0c25a50d7745377762d897bde02cd8f72bc9781520c5783d94. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:33Z), 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/TCAEX2084281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135bb6e19afb714e41cc9fba6ab1cf0db8fed002dce10b3f078a5bb94d1d6c83. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:46:10Z), 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/TCAEX2084306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098bff10114726dae1c13002e10015c1c0fd23ee21f35b04583f1f6fa5569f20. 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/ES71G2106148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd5393ef28b412bfb5d407dc829f7b7058cd8251f8058de59bc9b430bf7c25c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ES71G2106158.
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