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 0x0478b134843cc723bacfb9b37ff417b05754fe708e462909d33d5890d1e4a942. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8a6ebb7-5f03-4b5b-b45b-0fe32dc62901.json and https://artists.proofprofile.net/proofs/artist/c8a6ebb7-5f03-4b5b-b45b-0fe32dc62901.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 0xc737785d1d284d8c27df5c44d3f621feaadc4a3219f76600b54d64459436c4c5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZGLM1997241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbc30c804375a6927469acb165777e86ee488bbcae3c71d1886a8e2f53048e2. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZGLM1997242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017d9b0616404e0ca6949020ea75e3d9858e078b86ca55e9bd3b89e63d361c7b. 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/QZGLM1997243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860a3dd4c9776e9edbb66d8abf008e24f82788a60b4416c633dff66f1f393565. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZGLM1997244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac726ea1d0d53ead193c4fc5fb4db3b77492db560af0127d1562309ba4db904. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZGLM1997245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae3c7c204a83ff3fcc84bfc8a99053d7357e2c95cf398a56f43f653d225fe05. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZGLM1997246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f158aa605e841eb9722b41e7f9ebb8b1d7e269b8b83abb9f7fcfc8da4f08345. 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/QZGLM1997247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340c6bcbc0ac54ffb1cb74fcd78b586c990a6e5e38ab0038e649cbfd05e0d711. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZGLM1997248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08971f44fc919de89534fa855638387ce4aa9454602eee4509467a41914a8bd7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLM1997250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45da4a286e2dd79d69d0dffe7604144d3e2833aa61e97fb14a012bb364820045. 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/QZGLM1997251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c545e3f63c0f455934885776dba1ae1f9149af4e06e43fe7d5cd3da48c91424. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLM1997252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a0c705fa6e805e6ca10bfd33be3adf19aea83b2379d1037c61af5e437768df. 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/QZTPX2149829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa990ec9c85e2855ce5d7d82ca04b2dabe86007e3c8902051cb5a36c0d2f78b4c. 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/TCAHX2452422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82df690217214c2d794a9128b5f1a7406e58560f065ebddfb7924785a2bdd1b8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZW9L2202847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4352304d916d4258df3b0140f75f921ffbcaf17b9468efc32ba82579e2cc490f. 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/QZNJX2211927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913a0add9eab4f1694e2c68cc0de4d18e35d377b614174b87840e1bc354561ee. 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/US7VG2265714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7e1919c7ae9f390e79b6ae0c1f23e4a84e75522aa1d1d241a1f670d0245fd5. 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/QZNJY2042938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ae1111ed7cbbf5ffb98949d6a9bcfb26d009773dec2b587871bbe8b3f41837. 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/USLZJ2166685.