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 0xadbf0c17d8820333315fc872ffa21a8ff8d66288dd91370363d90572cb4658b0. 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/a261b970-7faa-436f-9595-299702d1947e.json and https://artists.proofprofile.net/proofs/artist/a261b970-7faa-436f-9595-299702d1947e.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 0x7b50fac96ad0580198b4d0941f61912d621037d52fe3ec3d41be49038ad1c011. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US7VG2253119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67493c7b5a959656a9d971ef063a7c93fb241fe3b9bb47527e2514ba489ba9a4. 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/US7VG2253118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ef0523558ea483ba739f984578fd092f9112eae6b7ceca90cc42d10e96b035. 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/QZ5AB2291083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01a175e0db94420c221aaa9566de5a3251b68e48de485d106f09f6c7dca3090. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ5AB2291084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063b7edfba5c3dd596461dac0e88401457bdf6554d9652469e5edd455bb61e39. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ5AB2291085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eff1f5eedc31c9c8ce46952ba7c242c6c78fe6cdc2dc6cc7941c613ba540f6. 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/QZTPX2213334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6f4540e57c2e1607e9f2de5405d8712b89fa08d6b8eef846129f51b701f1d9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZW9L2237768.
Homenaje a los Alteños de la Sierra Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601f3ff20b1a47d76f52c1a0705e99b759c3b9bd347c94ae542597f20a7115c3. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:05:05Z), 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/QZW9L2291440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e4c71628747427117a2a3f8ecf0a20fadf5334a945f166cad78ba8f696141a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:30:41Z), 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/QZW9L2291441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11d33c1ab01f40ca9e96e2419b21d2e3509a316c1990dfa55bd27cde5751705. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZW9L2291442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5255f5b478de07af4487823ed29a2b35fdfaa08e13a7b3e8e11258dd3b3cfd7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:07:29Z), 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/QZ5AB2388813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c50f9346b8be7d7780122df5d4cac03c219145ae1f285d798e69f1c5ca61884. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:53:05Z), 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/QZNJY2358873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876e8c55cabbb1b88708e2d6a15cd8c1337c8126fd6c839ba5d13b54746813e6. 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/QZW9L2389040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd109a4341db9c97be23ad07870e0b7efdd36204f77c5cf492589b913cb53e01e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZW9L2389041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf6210e30129dcb05fb8ea14f2b6f36a28d4faf2b2b7147aa0af2a2ecb8b23f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:11:37Z), 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/QZW9L2389043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8224f6308f706bde56d1047d887d8b13b0f10db58dadd48600010b186bde615. 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/QZW9L2389048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840078ebdeb191f95c19c4a6a69ff805d0fd28907f63560f1cc4d71816b87bea. 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/US7VG2506603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3c4e3da597e4a9d2a23be5a660c8646d8c05020e7a77f50ba0202d773531c7. 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/QZNJW2567958.
Homenaje A: Los Alteños de la Sierra, Vol. 2 (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b8a274ce6492ea3fa93e73618d071fc1ecc8b0af4940842dbe271dc8f903ff. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJZ2528094.