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 0xb0a280e533592fec8c22b52887f4f26daf3a67b24207ad8b0954d4d68e94767c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0a91c0c-d95e-4426-88a7-deabde1dd04b.json and https://artists.proofprofile.net/proofs/artist/a0a91c0c-d95e-4426-88a7-deabde1dd04b.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 0xb763ad42941bc6f8bddc5b8a3d087c2f22f06553370913d46a8e024b4e557936. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZES92392951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa534332994e3b8ea39e8ba2a247b3795026b130e6387995730d0e4d1d20a13dc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMER2595092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef69a127c5a7d1df065461d0e486375a6a4116bb71f0bebe07c1b27e625e6d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT3FA2543032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d55f9f8fd53dd227e84a3a4752f4a407c9900aad07ca9d66b7584c159598f2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3FB2599697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513eba430614fbc240c05d13a3189e36725cee4675eb7ea63c9adc261943b54f. 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/QT3FC2571033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897e3b39a9b34805f55a0879f54d41d9884b53de5f0baac2f0359aeb91ec828c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:24:00Z), 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/QT3FD2564729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f50095b8c161bbb88468ef18133100d9272273be71c023c6a87f2c89b53512. 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/QT3FD2568287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50025f3aa8089928bf8b63d38c8f44cbbb21efa237964740108c5919d05e5b16. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:41:41Z), 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/QT3FD2570434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7cacd34f261dc1a891c38610fec6fea59417744e0e9f4b1cea53e461aa872c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3FF2541650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2486c2a14bb9f10b0e62b3dea4805b3e3f399e53ca8bdf925d0de5f776cb7cce. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT6E52549016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6908812597f2fd6bfc3f3d1c052639ed3771d16b4ee72992721405f5e177350. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:04Z), 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/QT6E62578544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192956f5c74e3c1dea4eff3d3ed3b20669e84c82dbda4a9fd096fe9061ca00c4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT6E72588912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77a4a1f76b30bd21b80c698afc3b34d5dc261a2a03928b8cf6498412f86c044. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT6E82515536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6b0750d8a2589c3ee47fb6db25eb3ab837a9bbdf9d6daf721d17777e75def1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:02:13Z), 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/QT6EB2513241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d699372b38900373b355d2c41adf79cc6ff0feb8d75b853a8fdb43ba64bb58. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT6ED2582786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b60a7cf4349452174c5192848639bb8662c359e3c05a8d34d039eea2270f06. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:14:47Z), 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/QT6EE2594955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3ceebc66cf7f39585d94d82eefd220bfe9e268dd25a081110222a44afc2d8e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT6EU2533775.