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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c42bf77a6c4747358716d425dc87f23024b0110117f8a00ff8849cd6bfc443. 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/70493448-c6d4-4d61-a410-1f99a01056c3.json and https://artists.proofprofile.net/proofs/artist/70493448-c6d4-4d61-a410-1f99a01056c3.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759fd2a465bd8c67afa7e11db6a4ca7f44157b8ab0c00ccae17ac898586178f4. 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/DKAZ71721301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4bef0c897d35b1d73a867ce900c659830900ce3ea321282cac068f70f0a327. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DKAZ71721302.
In Search of Lost Time (Danilo Braca Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1704a1c8d717631ff33b6dfa8ed5c4ddc68670b24c36dd7f44ed624355ac23. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKAZ71810801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776a5cb8cd174a752ff243c93ceebe5d4d85d4898d2d27bf47220b5ce0749ec7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKAZ71910808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d1c557dd8d1a75b6eed1ab274f24c58735c20ab5b4bcc4ff61a72fb2f4abbb. 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/DKAZ71910809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace50a0bb6c716a1a6af2b19987c3b0b5a2b5b6ebd7077e744161bb3f87cdb1a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DKAZ72120808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8d99cbe7d3525b86e4195f3e8cef147710ec25d081c4b3a6961283226791c6. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DKAZ72257802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af00e6ba5af68e6b394e34e3f93edd867e7ab016a8ac6dba64a95fbfa605859. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DKAZ72120805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9429fa3bfd97fbc1b38c6dcf02a2d6eaa206c52eab1cb882b387f9de340eb8a1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DKAZ72230801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a3309f31bbd6d3b0d37037cd165b2b82d5ba85e825fdd9017c3363d9e8b384. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKAZ72330808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d82d90e20ce0481db998c4ef01a9036694f5e6c72b3bb923f164e05785e4d33. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKAZ72330804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0597170babe358307b4d6a2f69adb96b1a3c755c7bf8fd4151171e0f38a52251. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKAZ72225707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec0a8bd9cb9767f254e167c52cbe6c7848582fa2059cd9b321e693616b45e56. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKAZ72334413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5196a8e6d5da96ddc96e960138036832c7cc4a2bbec354cdd558f00bb0efdf2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKAZ72257801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595bec23db49408fc83b59ceae0bcdbcdb401fc73f772a03fca30d43af0c9a42. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKAZ72153001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6e4b91e515e2c9f693e41ee5a4404328ec626093a0803820eb22495318a142. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DKAZ72334705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97edb133160b208c0c67576ba1a9254bdd590cb1df4c081e811b34ec178ed113. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DKAZ72118801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595bec23db49408fc83b59ceae0bcdbcdb401fc73f772a03fca30d43af0c9a42. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DKAZ72153001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595bec23db49408fc83b59ceae0bcdbcdb401fc73f772a03fca30d43af0c9a42. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKAZ72153001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ddecc5976a3f7459b4d866affa76d6d95c3b965c4165f48e15e388bb298839. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKAZ72330806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54d7b6b6644a2c640d7ff143e5908718079765c16fbdc1e96c90745f3f890dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKAZ71810803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3811ffabb09ec642caf9f9c3f8e021230ddc5c9f6764dfe36c911867890fb528. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DKAZ71388002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d55effed755061d13c7c1b5c4ec52c591a2f182fc6096ac54d2d9bea403645. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKAZ71388004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b52d1278ddb6e1f395d98a1547ef0fefd9ecd04041f1619aec425c4661005c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKAZ71573004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbc443509856cb5062f0b8d4a0b936e534399f8167f018f0cd79be48c265ec7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKAZ71573003.
Chall'O Music Presents Chill Out Experience (by Jean-Marc Challe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6efed490cc8e5af29aedad53b685cb223ddd2ad5ad5f658985c7850cdff3163. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DKAZ71810802.