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 0x4e97affafe77501414f22721e39419b4a0e77f7876f4afcf77a8d39548634da0. 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/6a7a56bd-e4b5-422a-a3e6-284ef06990a2.json and https://artists.proofprofile.net/proofs/artist/6a7a56bd-e4b5-422a-a3e6-284ef06990a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
LTN's Arrival 02 Sampler: Destination Indonesia
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 0xf9889713bf828e1b780800b0f1e9e3df7f13c427ae5ad7b540d034cd77ea7f93. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBKQU1579869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd634c340fcaf06f240dc476b1c0cf7acd85e9928f74baaf1d00a94008f727dd8. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/GBKQU2314353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f2f9f042669109fa808323a77ebf33dfb64e24647b1b637e4cb1cc90dedcc9. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBKQU2459065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0b4e7e206b8d97344101e3549281be629131369fcfd5fc3ec8d0d81074cce7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GBKQU2512564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e2f297d3e8248748e06d0beddbb0191dd461616ea4fb40abdb5547ed1e04ca. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBKQU2525650.
Digitally Enhanced Volume Eight, mixed by Farius & Ruben de Ronde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae74b80e6839fe2be953a8cda54f335b4a6b8cae564642a51f7fe29b31c47d3. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBKQU2396502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4ffb8990a7573e482a1f699171b08d1010b83aa4cd07751730ac1fe2167c1c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBKQU2396496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3ffb24d698b6d9228618c93c6bdd15d788dbfd762cc76a325afde354ac609b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US83Z1783375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ddee1c14a942c4373715a76bda9d8cd0d2a742141dcbbf610ffe7bc8670185. 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/GBEWA2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b579b17e7bc65b5b89dbe45528d85ee477d32f6de92ececb877be30334460f5. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/US83Z1513469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22cd4fbe61ede4abde6ef57776256d01160be46e2212fd2dd34625f2f6f0131. 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/GBKQU2110783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03511f8fecb2a2c161e0b67516628ffc932e32c71cbe0ab8d4026cf77feee8c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2386881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f821f4a8fb57142274588fd971c19797110da6cd1c83b7fad6bb0169daafb26. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKQU2386882.
15 Years of Enhanced Music, Mixed by Tritonal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d5d79f3ca25286d67548aa8c50025115aef89a416152976fc6b9ffe5393579. 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/GBKQU2364391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e3f07932abc6426b242fc18635ec9220d6203c5ebbe0d2d0cc9da8b1421f50. 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/GBKQU2364423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212a17415570b05b73ec3034a16c439f937cde32fa1e4f1bbe7c3fdc20128dcd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU1331437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe469d5ae4638ffb18be9469d2decb6a36bec1aef1bf392f9204cda6ab4d34a59. 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/GBKQU2255109.