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 0xd29237ed3739b593e3e5c6cb0031e066fc43537cbbae092fb5203281924ffc1d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5c9a14c-7120-46a6-85c9-7fb4d55f91d8.json and https://artists.proofprofile.net/proofs/artist/d5c9a14c-7120-46a6-85c9-7fb4d55f91d8.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 0xaa4cbe1423fb068eff53e2419c9b3040436bd7c3beaf07acdcb4318f4ab8a574. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWR2449243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28694dee384f12b3bec083fbe90e86594719332cb6393500e95274c62a08575d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAT2446477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9c710390f4231ea9ced6ad40107b824f1679ad5545d81c25e69811fbbdedf9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTBA2487325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6b6b61084175f03f72aaabb59ba2fe99fa691fb7475bac89f7578abe5e09b3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:16Z), 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/QZZ7R2418897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb32b63e9e965e69bb29ce6ccd959956f7e8b2b01b446ce18c0fed971652a3e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QT3EZ2455367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b6f243b94a31b4b38a6a87b0596a5c6875e2b7f4b388f8e553fb994e35ce5b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYZ2574426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b62b184a7126dfd72c101ce7e0960bcfd5134acbec6845d15127c23162e474. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZDA42515385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf010f071fd9cc5a6131d61a960c5ac25e338471e2df2836ef54da1cb9a6a8705. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:00Z), 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/QZES52528813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa68ce077e83db71a0d141297f4bef98f7784cde03b187af8843a1e925069afa. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:50:02Z), 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/QZHN42594101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d9b53c8757699b766f28fe96dc4ca1cbe81b9c588f09afe30d083c8ec61968. 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/QZHN62574813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf62cb6667c99e57fa603b53c32796383b5059661fe1e595e69fc69caac6afb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHNC2508195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe4836de640f1c3205fa2cee7a197a904082dff639a48d9464987b78ca685a5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6L2556582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f73609cd777d737666fbc9575c22274a1bedddac15d0bab85a70774e2491a0. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZMEM2576187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8247b4ee6a2b4a1bf883fa480831981093195bf7e715b7017996f824894829. 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/QZMEM2512156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dfb9fcfccde577e1a9cd2a4425eab1562dc8e4b94d988d61136adda3b833b5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:40Z), 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/QZMER2501795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8675687eb96ccd5b216fe7a360cfe611ff8ecd2c8f84dc7a18f3a12c36025a. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZNWQ2577995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20432cba1ea9eea4437e5792e4da47a44cd7dcf6c59ac89ec9210c7affd7ed8f. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTAY2544005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02745b3650efb42886321608797fe0f9919fec5a57afd0516d5967b9edb64c14. 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/QZTB62571195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c0255acbabc142d9520a79a315b05c151a79028dd13e26c2a7213ab998deda. 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/QZTBE2576162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0072de00d591091a1788e3a03463bf18fc8d0a78ffe2a8978a90859391cdb968. 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/QZZ7Q2540664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e94225e1a64fb20c18d366a7b2059ba5fdeaedbf04c2c466d7ab03b162593f5. 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/QZZ7U2553391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1a04035dde9d42ea02ad1f11c8475f446916d8a1b8b547289a73298edfdccf. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:32:12Z), 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/QT3F32541749.