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 0xffc24d77df0a1ffe56dee158fa8945fb4366f87c29781843303c4a0b1b0a5170. 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/a3b37949-20e7-41e0-aca3-155c1b5eb79a.json and https://artists.proofprofile.net/proofs/artist/a3b37949-20e7-41e0-aca3-155c1b5eb79a.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 0x7231b3e7687b737edd2b85874803b98023caee7f18f2cee3f126e72a555be105. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZ4JJ1632040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d88ea0365ff906e54f739ec8a5581f0b483f1814d85da53274c44752aebebe6. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZ9Y21710893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b2ba20fc1636ea314cf95cb4afe61cf6b88cdbe4d68d6d5641e4ea0c13414e. 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/QZ9Y21710796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c030b8e979b48adb9a4d7723e7a11db0803bcc284a0d20d25cb76ed4ea554d. 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/QZ9Y21723786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ace82575347bc7c17d85308a837ef00372cc0d0c905bf79cda6e468cb2dfa54. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:27:51Z), 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/QZ9Y21723695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25584547bf6904f6579e042365558053c30bdc3541c5c1c3dca01f9f65b77b3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZ9Y21723689.
Pinoy BK: Ang Aming Munting Handog Volume 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056399672ef0ac3b7f3e72d84fd8ab73ba29f53625385b0fabf5c4327fa1e9b6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZB4J1817629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4775ce2a4df032dd553bfe630eba3ea9aefb6048c030e373fc75d017031d948c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:06:32Z), 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/QZB4J1817630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82faf6e0a92cc02cfe8a6088ceeb9d458fd984826f86dc5f0a4c265f40af4ef. 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/QZB4J1817631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe8a99a47a03bc4b20f6221171abbc9d3f6d3c274fdffc432f0a749af028a84. 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/QZB4J1817634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a115ad2b87be249948be7ac896c587e264095b6ac458cc818e11f9543cb627b. 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/QZB4J1817639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9375de797eb38ca01039b4cb8963ac0eef95cb4e626bb8c189d0d819ae333e9f. 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/QZB4J1817640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a18940ff1f78a57e974f8d8756fe340dcf62799afbfa3f31ede74bccd59bc92. 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/QZES51844983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffb43110fe7cd06c13a48b34c1f2f6f6a64ada5705cec51fb59ff9f47fff9b6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZDA81937248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6a0447e22c80fe0b31854989c2fffe875369bb60cdf5332ef450a14be46097. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZHNB2083168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15df152c083c5d82a29315fae07733414e239358fd4a01cdcaf7b0d8e205dd17. 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/QZES51850644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199b7c99573013d03504489b7c48e7a5a794c55c52ef9103f4c181f92c72ee4e. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:44:28Z), 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/QZES51850645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3732290ab87e1bb424c73d61f9c6b149acbea2c4e2376a00658b85b79ae2dd. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZES51850648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0539e3bc19710f66909382214025847b8666ea978bdba0797140c38a7692ed4c. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZES51850654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6eba3a0bfe31e6cb259aecd116e44131ace4bc35b66527303638b13e6254a2. 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/QZES51850655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e63c93505bfdc8a583a5236bf62fb466e02a65f6cdc27f402294a243267fb43. 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/QZES51850660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996bdd4ebd0077534bf72f5c1cd7300237adbbf67e7ab924bab060843e0a6b78. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:23:55Z), 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/QZES51850661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a61da82778da9d4f5b8fd96ec957770a590715e589e24c3586247798e97801. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ41933127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2a18e91e90c9c9aed8bc451284a9a7d2c6b075871641531b3d2960ca1b4432. 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/QZFZ41933140.
Saging Saging Manga Manga Song (Fruit Salad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9be7012a39124b14227cd8b88485e492588b378b70fef05818442ea2fac7261. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:55:06Z), 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/QZES62222715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf9d6affd5ec84912f250651a390230100d7dccc8f399ea4058744e37365e4. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZDA42378609.