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 0x92106cd1a8515131f01d84ebb3e69cbb8e6e4a6fa0e6778b214aafb1f5d2dd75. 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/d732d6a6-fcd4-4255-8827-919dbba32259.json and https://artists.proofprofile.net/proofs/artist/d732d6a6-fcd4-4255-8827-919dbba32259.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 0x4b66638fce4957bfc60e9645e89ba094358964ea6008e8dd1026fda379c80b44. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6M2255173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2905d5c045c1d938f98703499eca2cf445753569e5534fb44e55b9677911977. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN92393368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3902ba069a32808f7ed9eb7d979c2cf9f7481c92e9e8dd8f687a502568cb0c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN92393370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fa13658d09d63b04fa08da3df1d902e318c2481ef35a0b5f88b2e49e61effb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHN92393373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087df69dcec2eaf18e425ffd7599f0dc2e81882ad3bfa50f33188d7913e27d16. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN92393375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcaa2b55dfc1aca2cf90015d1c369515b98e23b9888714d42ac1f78f6cab27d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:06:24Z), 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/QZTBA2350848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbde0dafdf66fa0c7f1c77eb21154a93c85a54b7a8f7b4842334c6c7063d8423. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBA2350849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eacbcaf175ab0486ae79dd1995e9c0562fd0bfb82f2f179ae6a13bb6045b11. 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/QZFZ32400476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2f52226c22aa2b3c6e835b93dc575f0903c95c72cb1710a44ec3a8ee09ea4. 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/QZFZ32400477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8125e02993a31faf2d67d39025dd88cb9f3f5cfe649b899d46c859c7bb2aa5f7. 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/QZFZ32400481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b5662dd4f018445731cd68d0dd5d928361aa908d9b20da3b185362b44b0c46. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZFZ32400484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e093e08d033dc993ff7af8330cb59d755ff6fcbbeae07d15341b61300e012d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:25:27Z), 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/QZDA42583234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8bb06865451fd82fa96dd7ed95072bb1e556822c5e14aaaa44d64d3a9c598. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:43:05Z), 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/QZDA42583235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5a4eb48f719ad1d3c0aa7aa777165254cf5d38b7bbf6bccaa68b188659cc2d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA42583236.