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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6570e85cea948075d48ab4a1f282eba5fce82a9d8edbb673d8912bdab540a76f. 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/6bdd84ff-3770-427b-af77-f350ad8fe1a5.json and https://artists.proofprofile.net/proofs/artist/6bdd84ff-3770-427b-af77-f350ad8fe1a5.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff28719ffd666150c58cd5fb60bdea0ce6caa8aaced2c0cb907e21c907444614. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJZ2191774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127a707e9a2221dd27ced023152395f0006633678e6c65ae8c3fe14a7f6a2920. 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/QZW9L2368791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d40b64697cd1db73de0e4cfc553658502c2496ffb87caaaed57e5b9e71e3d0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLS2541328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cc9851158a27fe027e822e2522611a479a71f0a614723fb3c071fe055d1762. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2541329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662b2281afea11fde7a741c00af66f917709c2350c3fe92628a3576e77fa4011. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2541330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56fc2a3f93caf8b7637f89d0563886cb305745ddf2d66626b49ce828f9ce62d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2541331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd47d4e2c369e064ae71d6213ef33621ffd5ee6c5f6169005f3d4fa1442e5c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJZ2351251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59590d1f9104cc6e3f8c81472d9f5f9bd4a8f343eae2e9c936a2337e4090942a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2541332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e9b78bed9f8fe49ffc52d18e5939ff7c95cf0f246d4f1acdddc5b8949c971e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2541333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10369ebb4a5938629ee4658dd9117cefeb9ba16dd9b3d1ff9ddfcb163a785e2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2541334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8677f12137884ab05f03d34fbe7e81f14ecc7be5916564ee0d9195532d7022. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2541335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7cc77b2c892ddc0f3f3cf2264ad774eada076207b727a5b8f96b3fb1ad2082. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2541336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697133efb255984184bab26b522f54c6f6ea97185c130580d6908d6864a3efbd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2541337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d4b8294d0f62d0e49beebde6d62b9fb39594bbd272dc981fe2648008303f65. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2541338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad201fd3b875048a2357640c5296294f0fa9cdd34d86c0f78f2e456eb0ed42ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2541339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e0c9f5e58eca00b9efaff962e9b8e23366c7658caa23e64b870535292a6bd8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2541340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41456e1365b16e55b86e6a4993ce61084a51e0c3f5d9f41776b328a922fd3a5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2541341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb911730b3a444d5fcdba684476acc4e65e9680df38a279c3d0fa4083c36f8d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJW2455391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2560c1664ea866110a40ff47208606b5109a13fa940423d036a805ba50470966. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMZ92332151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0de10747445ac0ad31ea338a47f014c24826e1c75fa20fcecf8ac81f27f364e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2314222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb475cb25b388e8b3901ca40fd90aa441c72db141254428f231047604be762266. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM2314223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed82335c02d5dea3f97516ead29ef5a15b0f171ec02815d947cf968ad443771b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM2314224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7342d0c8bc66f672f09af5f977fd194e60ab7563216f09d33d5f3a7a55cb902c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM2314225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d57e26becc4ac34229224a600504417d0ef0beaf69b58d14642d930bc863b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM2314226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4783fab19441d82e0ff217c01e7025b912117fe64c9f3c202155e8685ac048a0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM2314227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71656394348d4cb7527ce77e6e31c1554e546baa668df25cca61101505b5e013. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLM2314228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8ed8d9684fdd6a802896c4699e9ad3468f15aa45fd211462a31346c5314465. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLM2314229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50fa3c91065d8fc064eeec9a2c619dec157cd58b153e9f187a42b9081d10643. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLM2314230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2932fb8a532021970850724fdbaeee01b66808785e7bd15b6e3f0437ceb51a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLM2314231.