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 0x2aef48c83fa28065dee5cc0b054b6cbf7b5a8f10b0f19f900f65edb837f64503. 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/dd3f5ae2-8059-4d3c-9e42-48a963e52f45.json and https://artists.proofprofile.net/proofs/artist/dd3f5ae2-8059-4d3c-9e42-48a963e52f45.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 0x02a9ec42f1865ef3c88ab66d386e35d94e81bbe2cae5b89b8a61c402f22a41be. 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/FRX282254141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaeaaef811628e1814f1f05c02247e3aca002ab1932cc3c44094216faf69162. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA062229940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe55bbeac93722656677319821db221f1998b2025878d59e30bc3c1c6b4424a7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:18:41Z), 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/FRX452275444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b88cdeb7b023ce0ece70e308fedf9e2f1787f3f29c58109e21dad4db0c4ed7d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DGA062229985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e32ae2b4ee4b07cc8d2f49a9096daa8b680e134cdb7612965fcc0d151642af6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR96X2315925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be4cf2684a1843a6d13dbfbf02cbe70c083c318925812c8633c59dd9c209a19. 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/FR96X2398361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eab85e60332ba4225eb63464da0362a30a8be7687cf1f56f0d600015ca6b77. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:16:42Z), 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/FRX282399592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c540c7066cda8eac1a994554c07c27048b137f36a8a8306e0f301f9d892352. 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/DGA052368919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fb800aa403a4363f63bab0e90e6517179a7c6d42ecb956a8a261f29d658f01. 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/DGA0L2302909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6099ef28592549b2769b5a6b5cd789064a7aa3a34cbddd223e7bedc85204ec8. 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/DGA0Q2391430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110f29a4aaceb6d3b42c64782ba3b1f55ad71d4772614f354e37856a4bdfe187. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRX762449511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134fbd6bd0616db00897fa73db209cc40b49381e32ac3e6672d54328983f7f35. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DGA072416816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b39a84f79cf8b0c1611f8b06fc533315da814ff784efe13c4ea8102661ed2aa. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:38:27Z), 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/DGA0R2455706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffd0fc194657c687014b9077a594994ebb8e5a44de31313e79022d77ba21998. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA0T2419084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04adb61a4648347722713942c43312c68cb897a642c7f7979e3ea40e79a42e5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR2X42588256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2da8828919adb978378e867d7cc918bdc6e8b0dcb60a4d7702ebd7df9661a2. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FRX282547568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4553f545ebf1f8a79a1a5336514071bea8398f9ce23064603a90a85f3bfb1dbd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATP139601922.