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 0x595a376653887dea9126e4df01c631f7ed2cd1ab904080202894cb33db7190aa. 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/6968871f-efba-48ec-9de0-bcae462fdad3.json and https://artists.proofprofile.net/proofs/artist/6968871f-efba-48ec-9de0-bcae462fdad3.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 0x4a8d8254b7409bc3babcf9b789f9b1e6abd7fef21fab088a858066de4e489580. 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/SKK431300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9be2db431e4f64b674ba7c608e2daa93af9eacc265537cb52183501bafbc51. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/SKK431300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02c0d82a98d3fddbd0fa20651f51f5e8569227bec2f2e5cca650991a3fb9646. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SKK431500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5540f17c5a7a9e1ce195757b545eaaf75835397173b3bb96fe9978dc4c9f6870. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SKK430800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707d0008903ad35be25f50838dc6e36825c0bcf1c933741da9b5116d424f6d88. 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/SKK430800316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba64da4a7da8a79644130e14089f4ec0fcc902b2c6c167a9aed31b2af9fb293e. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/SKK432100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f542813c86e10f0fab793bd87a2db8dd06e27104763bdf82222047329a2d62. 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/SKK432300614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2657230ba23e48dee60f78e0638a506c3af19889a2cb2f5fb64a5d72a61f44. 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/SKK432400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fab73693e33e6ab793e6bde52081007cce3f4bc1740eaec655782299bdcf21. 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/SKK432400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf070fef05e959a76e3f7aceb7a967cebf64bb9b7ea34ab3bf468dc910c04b24b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/SKK432500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7847986835d670934307599ffb444fe76a5784b2da024661584194753a607c7a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/SKK432500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34458fbee9c36a8f9c0c3e744de1a98f94a6ceb09619ba39d163f2878bb931de. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/SKK432500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ff056fa92f8ff051cef21355b6114b6027247ca770b27e382a8193c4ceb6b7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/SKK432500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdafb657c56440ccb26f0f30389944ff817b214319c7a09878936860a2ff037. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/SKK432500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e5aca67f25a7c6d99e16264fec6c962567cd17aacf34c17913d975a289d03f. 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/SEYOK2161140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53d5b6255daf5ceb4169d899491b6b52aeb658a9cc4748bc93e36a9f5499267. 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/CZAM82300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f83e04e0fc0fed008e9cbc2b5c2c10d6aaf6fe4ce6dc56925a75e17717e5e6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SKE741300314.