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 0x9ca0a2956ae384bbfd461d3e598f5d6bdbd4fe3cc1009e6e6f81903d71e8271b. 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/0a20837f-2457-4fd1-8ca1-dadbaf05bf06.json and https://artists.proofprofile.net/proofs/artist/0a20837f-2457-4fd1-8ca1-dadbaf05bf06.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 0x494166aa1b0358d043898bd42dc921ede4ec19ea0d1c98fe1204c6d709810f6d. 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/AEA0Q2181165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e09b2446f7eb5ee281670e8af15fa09632ad16564a304e3a1691e815d53787. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QMDA62104639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecf7467d2cddb3babfdb4b47a5b812e58571a3b8724a8618757926cd4d04e23. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMDA62104645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9216bc25ef2061af92f08bba51e8d36f6fc9b5676a76f788c9d1c999411d4a14. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMDA72155700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3baf45145e91cb9ee28d3ee2ff342837fc5b8ee19aaf9f3758c2ea443014807. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM4TW2220695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e97b07b8018ecc459d1ce5e4771f6264e71a20d87c481b705fe16ac3746fe58. 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/QM4TW2278576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66419abbd4fa03e33d642d1d618e68944e614a4ddf72f55bc5ff1e4f3046dfb3. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:04:41Z), 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/QM4TW2278313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c3c86f23c9194dc2302d63e0161ee8fc2f96ece9591b0855da4791d23571a9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM6MZ2203057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36449128c153c2a30f3b71ca60899fc0618d4a076cb2b95d140f7113fc4dd067. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHZ62281941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668061acf3559bc7665dfd9d7a33197d13ccdb4bbfd11da84a754adfd1638c6d. 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/QMDA72287263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ea4e706b741909338340695b4ef6d9e8eae4ff5005767e1e1a07453122cb7e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM4TW2301784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadb545f4917b65cfa702d2bb477a004d6aa23b3e70e11f11e2d66d60f7efda5. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/DGA0L2413564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cd9ceaca8507eab048d27b1f53856ef553b7afe496c095b2e2a0d83d3ac4f5. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FR2X42539246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748dccf152d0f5c1325107cebf36b2b433cabeed9bfe0f85e64c2c2858836942. 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/FRX762584886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef14dce03c7f72281a39b3b182537221fa666c209d0741f23074d5bb45c9eaa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X42394630.