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 0x117f0fa92adb7d20ddcf215b5b2af3e4bc4905cbf61a4c356e3bddacac7e6f31. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75231d4c-15c3-40b4-b0b9-43e613bde103.json and https://artists.proofprofile.net/proofs/artist/75231d4c-15c3-40b4-b0b9-43e613bde103.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 0xf8707c1ed2e585e71acfd958be2c74617eee23ff326b09e06c1ee36fd658cf85. 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/TCAHS2346014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4782b9ec76fc54cc6e7b14134b0772a4156b21021972b84ce70ee05d73ae37. 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/TCAHS2346018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ac7b63f3ce776a6e4f1c51035d1b556bbcc85ba2637c480cd8d9361bc61b55. 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/TCAHS2346022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecfa2c839d383900eeb097a103388e00076de9f56a8a0c16d90ca40fd7c12d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHS2346026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27e84ed44e37bbbc49ec11cc5bdacd70e05efa6d47f5c4730728ffac4abc0d2. 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/TCAHS2346031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758f57cdd27436a9a8711a5a3afe96160044bde1bd12af3a6039c88ebbe28334. 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/TCAHS2346034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda385d0ca4eee0d69a10616c500ae16c69029103b5749077e0a65d3e3972ef7. 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/TCAHS2346045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c50ad00a6f5a641a8051f19cc5734dcfde4ef377fc8d1771f792d817e50aa8f. 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/TCAHS2346050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aac011f3b17fc79f3f0bcaf95d925261a51ca8cbc0e294bbaf0a07fb60a16d. 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/TCAHS2346065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb93a879e2f379eb5547d82b66b71ac7f5ff60e43f5ada3a08c6b5c171c11f3b. 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/TCAHS2346067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ecdb9bf084557e709df533a8c7e285a6e08e7dff1a904988e2169467ca5e2a. 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/TCAHS2346076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98c64d3431404f6ece812a30b2496bfd792aa22de7e4ba779c9dfc846277795. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/TCAHS2346089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe739b0e8281c34793b0cab9e1461353605789e0f695d62cdeeea75a958b2bb41. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:39:17Z), 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/TCAHS2346072.
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 0xb018e5790f0749ca59c2f6b70db09f0c62c1c944a80b925dc8097a32b9edd195. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAHS2346005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5f949ae826d5faa26566508620fde17f5519610bfe2eed815de463ed6af6da. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCAHS2346010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbcb3ba6c80a4982117f566f566f54326e1d1968da2603b1e834003f51beb41. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TCAHS2346015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257d8681c68b042e5e0386c35bbfce229abd64ca473031c2df3b2b0e7773152f. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/TCAHS2346055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5ecc611837d8958d427f3b4741c7b6bba5ca34f9f6b4aa493ef4fe6344f467. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAHS2346061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4b0e34a0de9618a0d51efa4474a1cd04234ee324670090b14ee8323b2e0f12. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAHS2346079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b0caeb9e6ebce5c2f4c3c3f01e79ec9c824f8c4ffa041892cd5377399ba598. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/TCAHS2346181.