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 0x32bc05dccb78c59afc93ec99e72c9d9a8e02421cf59aba7160cadd8bd22a4d1c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15475bc3-aa01-4263-a459-f58625b0e022.json and https://artists.proofprofile.net/proofs/artist/15475bc3-aa01-4263-a459-f58625b0e022.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 0x6d94a3237c8bf4f64e8bd47d480c2802f8e55e01fafdc5cf5819ca6cf5a727c3. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USA2P1900596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214653620cdbcbcf0b3ba44c8718c36bffa49a0a0a586882700e11d5a1a6c520. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:37Z), 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/USA2P1900597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07008536ecc71b115eee76fb6d07a172ea422998984b6fdb61a9c85adbce91b4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:23:40Z), 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/USA2P1900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9be7f39b5ad62560477b3679fa07b6ab06aa4a74ae3f3b48b9692c58d45e89. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USA2P1906151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0f66c4f4caf92cb4f0f23d0a47a63e0cf0f77e43c6697fa75446834f4cff6e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USJ3V2100947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcd736cde8427b77df98696bfe43cf8e8f34274c381b2c81d14ea25511a7178. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIX2443553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dd5d71f70ba4af853f531df928d416f8ac15b881163692584bee5f043a329b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:34Z), 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/TCAIX2443554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8f62fdce5d3ea2bcba9c4426ee41d32ad4fd6462e6694bddd59f3e0c7ae6a7. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIX2443557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa205d21d26e02d439c7d86c28b0a5549cede3be59137c7efa82704003f92b053. 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/TCAIX2443559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a311f19862987164a7a00c6359f178f56822d547df26fb166b3b71a7e489e9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIX2443560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf18acf2547b551a0c13a84573ac635c05b49a35d9661ca667587e1e7623bae6. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCAIX2443561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e12c94b5428f8fb4bf6629789bdf297031d1ba0980df27cfc0a8f4c30ae717. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:08:26Z), 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/TCAIX2443563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543d9918b3c05ba78ffea462b10e9cc0c8d834c55efdcdf8323022306e642cf9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:41:40Z), 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/TCAIX2443564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d590daad23f6b571da9708afdb355737ab8138670478437f3853f5b123774ca. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:56Z), 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/TCAIX2443566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7a9fcb7d3b73dca1a2228612a63b87c74af6fabe243b2bc94b34385040a264. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAIX2443567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aee10fae29c6226325c58f3e63fd6a02d9073b5dc842ca551365fafcea0e2b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:48:52Z), 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/TCAIX2443570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90eb17209f35e76753d50fb768bafd7af624c2c025babfa343359bbdf31f38b. 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/TCAIX2443571.