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 0xf3743ccb13722dff47ebb5be768817e8d9a3d8bd41a15ee42c9f02d7f3825b06. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d43a3ab7-bb51-423e-a5c2-cd41bdc8e595.json and https://artists.proofprofile.net/proofs/artist/d43a3ab7-bb51-423e-a5c2-cd41bdc8e595.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 0xa58585dde44b1d88ceab283dd7dc2394f3d5874b3554249aaa34d9ec3b5749c7. 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/TCAEP2032538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d4f50018b9149f99ab88d973c96824d368ce497cb4736a3226a3380342e0c1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNMW2187278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525d1956acd9c4c16d5564be0ae5536fd9c51bbdb4426d42e8a2a9167dcfd211. 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/QZNMW2187280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ae9d6e5ec1ad8173a96c9a36bdf57ce8b48fcac1e93c2547342e0c91d889bb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAGP2278350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0911c891987407dd63809eff32b808633a51ecdd33a1863ba4dbebb0029844. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAGT2341314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd7afa0d58f41d69d137db1bc4e712fee8a4ce502ce464dc7884a1686e3eb3c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAGT2341323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fd6e1dac84530991bf6c0f95a39ac67b813f0c0ae0d29de179347fec288512. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:43:17Z), 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/TCAGT2341383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe7ec9740dbfb8231000513937dfb05015305482e09f071b7ec9e6af5c37ac2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:31:27Z), 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/TCAGT2341562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0260c76e673c56eb61412155d7202918eadf5e271c7073f2479c3c2d376533ed. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:27:03Z), 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/TCAGY2357877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b714898a5f382a2a2a3a2561020b9791e7406329af9d341b37823c1aced25da. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJH2549604.