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 0x09e2411c551b4be3c0866284dd92a6300f69d2354f4ea691979605ef5f0cbabe. 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/b3fa7e8d-4d6b-40d9-8a3d-dea4bdc0b23f.json and https://artists.proofprofile.net/proofs/artist/b3fa7e8d-4d6b-40d9-8a3d-dea4bdc0b23f.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 0x2c5c3454c501c50cf71331a459cfe095e131cac85c7e981010cf864eada1ac86. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/FR59R1768553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6d8f7e4f883e76875b2ebbdea159d67c115364509105c891523f130619e313. 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/FR96X1723498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc398532f8ad4b5cc9d1a9f7904686f1cdf9d057bddbc3f37b65912694854cda1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:59:16Z), 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/FR2X41842118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec11c2e0ebe7467d162141dc5b0ec7172f72f8e86347cd81cb3fd7ea5a05f35. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR59R1866330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb76f248afa0d73d1b60981473d902d41db47c11c0142d27f17e30d4811fba21. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:50Z), 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/FR10S1940989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fce632a2a387765667e6bc0351df5e8da921c1ae1011119859476bd7acb9572. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:21:48Z), 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/FR59R1993490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c9cad0a4a698ac5f60824d37a6252dc248d630656cffbc515098c855510fa1. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:45:51Z), 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/FRX201912788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe75efce3c9e7d11d6560b98132f60c14333eac8c6b98d58a4ccb3fc6a8bcbd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX201946327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f239594886c350f0c31cece1bab16757d166288e5f53832421ecf898e3964c. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/FRX201950255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ee8bfc36969cb583b96038a5883a3835f4c8d37dda31a7e02b907af2150f3f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:23:59Z), 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/FRX452171799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97394284bc2b2d27209fb77d06e84f4080874bb281a6e7e984e555bda24d3e88. 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/FR2X42237547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e9c2424d3fd4c225e2a3366621ee84b2a61c197373e23139efdd6a76810715. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DGA072201497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf26e3d2e0a87f82a1022122c4e87b947c39255dbcba78042b9550b44ccc911. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X42341954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f82f3d1adf791c1e8a4c4175a5e1a488ee8a7481276973a4ee7db0823c29b6. 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/DGA072426916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9fcee70f5160e82cd68d82fca4f8a9ea240450b95a293e99db9fd2cbbe9a36. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX282556225.