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 0x35d76c641cab5d5476fb200c854e0ba628d32333a70f3bab97fd6928c361ad5e. 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/dd32164c-392f-4ff9-ad8f-ed1c7d177fac.json and https://artists.proofprofile.net/proofs/artist/dd32164c-392f-4ff9-ad8f-ed1c7d177fac.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 0x26f432461761ffa92da8c1f2a14e6edf7d75bae9aca06df488cc055a229e41db. 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/USHM21575278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4247a2ca66d09de3e2bdf63b0553376d62f76b622f310deee03a780b06b451bd. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USHM21575279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabe40d88b21235dc55cd48878a73eac682b864c4fa41a49e099941ea2ea6b1e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:27Z), 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/USHM21575284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d913bbf4eb27011c7d23d8ced55bb209d33b53b429708564da6e730db9048c5. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/USHM21575286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10982d606c2c4bf95fa1d570ca71f7e310c4f048141d86bef5878b22ce9e8b0. 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/USHM21575287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf168af8cf3d964dc08b959761d7caf68946922f9da48ceac19d3acac20590e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:12:42Z), 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/USHM21575289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8e2ad09db69b6a07db9de19e08b04adea6fd956a9646481e541a4c8c6337cd. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USL4Q1752967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45f6e11703bf3ad7971d3f1e66d595ab22d0855fdb440fba144dc8cc51e7175. 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/USL4Q1752968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4051ad109b12dd96fc4f6c34d9522b4323e72538608fadf4be9a5f11ba8d7e. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USL4Q1752970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807ee772f119fcaafd0e053315fbb652cf84915f40ead3994aa0a8d49ed94ba0. 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/USL4Q1752971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a7e2a796de98aba297a4d1f07af9312c53ee8488fdcefb5e8ba117b3d30369. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4Q1752972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf653ac4d64854ef2788ad7520cfc7242ea7086de772ceaede8c9794f92a1c31. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/USL4Q1752973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324ebf106ee174e3c19eb1e4c03dc4c6659a54b7f6a5fe79159432ff4b667416. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4Q1752974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ba669dd1fcfecc010fa0086cca5e1e91f61dadc5c3cd9a21524c189d7833c7. 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/USL4Q1752976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae121bdc30f73e8081f81a4688fde31188eeaeb5151d872d4b6cab389365c986. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:47:45Z), 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/USL4R2018427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5280f081397237143225184a2beb15039063b1b39dda3c66ff54cfd1b9dab287. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:02:53Z), 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/USHM82393756.