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 0x13a7bb0c70f12e8d6625a4c92a9249bb2fd828f94eeba9a803e7e2da326cdbe4. 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/fd2dd52a-150e-45e5-a605-3d2107da70ed.json and https://artists.proofprofile.net/proofs/artist/fd2dd52a-150e-45e5-a605-3d2107da70ed.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 0x2d26a1ca6e929367b46374e5ebc64b7bcd6ec5d50d230fe43468e3b09369cd6f. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USHM82009499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7200803b4bb1d78de215ad5a938bb2fa6cba390d06f034b801267bf6ec8db8fb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM82009500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba563661814aa3c1659a9e6c121babce41fe4b95a151780df9857ec5c3a36229. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/USHM82009502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008905566195a185e9801b74adcd4c11eb522563918f5f1b281693ddd47654b0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM82009503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45de1e79b0b23d07a3dd6c6ad0e51ad7d78e0557b3164a552628e39114f61ef. 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/USHM82009504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4667678c8532b7ee689edbcfa7b59505d7e83ff2011bf6fd012eff12d62317. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:59:35Z), 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/USHM82009505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aacb781f6b220cdee09cb6957d80be82935f35a534ad3ade27ba98724cbbb8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USHM82239943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2664903297b7ac7262aaf761219df2cedbe7d92cc64a38d5bdb6f7d71830e959. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTAW2205818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7472b2a19f438cda25aa897d30720948e8cadc83f0f419668969d46e7e2dfde. 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/QZFZ42307432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c3520c797f0cfca6a1d4489a83f2b5b11cbbe8a3aa2426142c86d4c1ca2dee. 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/QZHN92481294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d27cfc4d95fb1210c2012785f397c8bc405f9f7a0785ed39362e08e3680fe40. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:35:54Z), 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/QZHN92481296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4739f47f8de72e7b3cfe2e5854767085b075837737e595a53a74d2194a819e71. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN92481297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cfb4dd20b148697099ca92dd8c74b01252a97b344ad521f4c68dd63c958612. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFZ32532747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10ee6e67d3d349eeac1edecccdc75fd3549d8484a973b430ba5c30973ea1ab5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN72506862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc66dff74cf9a1ba8a858320c2e64d980097fc8f49bff6d06524b2d26e94de4. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZHN82522900.