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 0x34946118d5bfb8db15df92a320efb3ed787cabdededba73ada785549e08e3cc2. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8292ea9-0f37-4863-8f93-1572a05361a9.json and https://artists.proofprofile.net/proofs/artist/f8292ea9-0f37-4863-8f93-1572a05361a9.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 0x95e90f127b1ebd6eb2656729af85c4743212dd8e9324ea43eb3e9cd94a59174e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB22490240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23eca4b91a201a0634756765984b0f9df7c387f2342bb091b7eb07155bbc5a83. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZWFM2475809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df55b464e73c189b218318165fad61c993ab9b1bbf479f83dc83cb6310ac8db. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:26:33Z), 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/QZWFM2475812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa640429ab0709dea837d67e922af15a14be6f196154c3e4da70ab211d5dab741. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFM2475817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb380bc224406791b4654af5c30c00ebb51618621c05d76dd9daaa7c91a27537d. 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/QZFZ62570315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ead2b5cc586152829dd79f7805fdd1b6baec3c5a2b2560ed25528b1488c4d7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFZ62570316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae48b7d8e79fba12b53f9c2d75be0040efcf3eb2017ba68b410b13d503c9eaef. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ62570317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbd4b4b05c8f29766f4072196d505e78629ad7711113f52b9dfe57ce9c040c9. 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/QZFZ62570318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d48e010a3907a01e008192767ec705925d01944df1956ec9a1d13fa9f07fa2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:00:52Z), 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/QZFZ62570319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc592e2fed098cb78677f1e4165e287ce6e27aecc6b7f545cd15191070999957e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFZ62570320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f50abd8aa2cdf2f77d405e69db3af9f11cc35a8c4aeabe8af3d8fca46ffc597. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZFZ62570321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9c9f8b6316880f9a77e2b2603941df2609658aa4c07f9681ad2d8cb297994b. 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/QZFZ62570322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1a55ec256758958e87feb32ea7b0e94ebcb7bc09911d6e11d3aca431802a86. 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/QZFZ62570323.