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 0xef08a4a535db02e38770494a257a3e5fe8be4b2d206c6e0b4fed9baaf0ee442e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a955a9a-758c-4baa-9200-1a7a9d2e8a85.json and https://artists.proofprofile.net/proofs/artist/6a955a9a-758c-4baa-9200-1a7a9d2e8a85.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 0xe13d7c16ac54ad3e74b346bbe4fc224121c4412bbd44a2bfd641e04edcfcd044. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:42:04Z), 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/QZK6N2219898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f7c76b8aa8d909f94055de9858ed94412588b91a7657e963109003d887b503. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:03:47Z), 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/QZK6N2219899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116d189a60a95c845c5c56f78a59ed5c8423f581b408abf49a1e996e6e3c2ada. 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/QZK6N2219900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edd485732e2a2df7be3b172b92e6e9d7e4c72f985955c3b2c50c76ecefc532d. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZK6N2219901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4874e6ddfb932b25dbff957a4991c4d26e0887265635ec07f4649b479d6ae530. 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/QZK6N2219902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526ca2da3b1577bde0b4b2b0f479071dc075b26bcd3752e9f2e9a641d165fdcb. 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/QZK6N2219903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9599d262e7431f3efb29507f8cd3fc93fb0d423ac62cab0c922500b14411c355. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6N2219904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b94c4b3bdd164e737aa767f9e3121498b5724dc941af225f76e3fe9afe13ac. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:41Z), 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/QZK6N2219906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4478a8b6fa8e910550a1303211422ffcb47eb511e0c2360bf1b39befe768ac. 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/QZES52447684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3196a05123d2617d440c726dad939cf3f1fd6fa8c8495d2efee1b79a40daa8d2. 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/QZES52447685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33368b91b70ca510c4bec0fad9f865e71a9824bff54db121badb952f5c897b7d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES52447686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd5b805b1417257b68a60248d3edb3826b15c6d0a45926640a8cca24bb70684. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:59:36Z), 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/QZES52447688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9533901e5340832d44587b96c1c21de79d0919047ae8cf4f73312183e033d49. 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/QZMEQ2520480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1441376383650156c040b1286c2420a3dfc873f42ecd25dc99f0becfd8b6ae94. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEQ2520481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590de29ec6f94194c264f1f73f2276212f83ab02982ff30c3043ab6c6b351a40. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZMEQ2520483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08136ad788cef6b190dc0d5a1b50a5b1aa32653c980fb2ef4f7ef4206c989450. 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/QZMEQ2520484.