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 0x0e89130d1fc0b71174874ff6f1acc2a2f5bf239c8ded4b76fc32c5a39000f220. 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/b80a57bd-a008-463b-b361-9d127f1c2d40.json and https://artists.proofprofile.net/proofs/artist/b80a57bd-a008-463b-b361-9d127f1c2d40.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 0x99d595e60d0bb213c370a7a7cfbcbf8482f67b1e3d464f90bfdc2b736267560a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:04Z), 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/FR6V80804274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f36d5208bdce07212ad71291b7799199959e3a03a49fdc1505b163afe952943. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FR6V80923986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c582c22339a0c332d0125c0bfa5355a482422d3e3ab9a404ce45cd97a39fd70. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR6V80923987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b46ad479e8c229f12b61faf24350a33740b938db6876289f697f01ca0337eb. 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/FR6V80923988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce954e3317e37d885914e021fb6819955569b8cb4767c2cb2e5236b3268965e. 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/FR6V81028616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ad32c0e104e5629372c211dd4a7014c7bbd252bf6b7aa5395dc0e44a612ffc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:17:13Z), 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/ITZ811300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce27a0be1b495fd6f420c6aa4615f203a0f96d71101a3da39c78048f0354dee. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITZ811300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b673943c383c696039203ecb10c9755191f15ec9940227ec36f9a9f94ec7d. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/ITZ811300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe5ef46b929c329bef68bd9dd9b40abece51402ab0ebfd4066d8f4dc4f7bfb2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITZ811300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd70f45da9f94c699e05cf319f4dc3481f806bbd46188acc6f3beeba94172f6c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ITZ811300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8fbb77d02874df7019ee8411194e711d52b0b9ab25a1b0ab97ddfb7e3c8732. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:07:01Z), 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/ITZ811300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dc2861985cd742983e293a744245e167773d98a3c2b3e22dab57eb4f045589. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:09:54Z), 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/ITZ811300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dad04fa79c8443aa1435d801d4372ed342e6d3a3656d1d2fe3767fb2687816. 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/USA2P2471225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66859128d915c876e6acebd56cc633cbded1cf4f8055b2a076bd7130458cd7f8. 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/USA2P2471226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8ddd16af0eb0db1dfe510d6ea9e867598b1d1977137a4fd42a06f9a414ab64. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USA2P2471227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5c1b949825069b0faea9dde36b05b9bb4d30297e1048909a5a514fe34bd4fc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA2P2471230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba2e9666a2204544fa30b61bb316400759b20e6c3d69dfea9151b1f1cd6a5cb. 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/USA2P2471231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d4ca4336fe06759843fc1bb4bed65070bd89870b779d66923f7000e2060f3e. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USA2P2471233.