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 0xc6e9e2287c42547add994744691f2ce7f750af301d61846f33eb9d99ed6f99fd. 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/5a1a1a74-ef02-434c-aaea-76519b32f635.json and https://artists.proofprofile.net/proofs/artist/5a1a1a74-ef02-434c-aaea-76519b32f635.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 0xc1ed29ff8e93168652709c44652d43352060207a3ee87bbc0e463675a99079cb. 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/QZMWW2133883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218bd3d71e74872a4be49f41b01cb2d1d24d59bd14b1b49da8ef3b81132ffa06. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZMWW2133884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f33c5035a596edae4c7c565e584f70e6a8a13240e666717e20a18dd875ded4. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:03:57Z), 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/QZMWW2133885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1631f4757f06193966e4eb8ad01bf2d4a6fdb49e465d5840b92ca132c6ff1c4b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMWW2133887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41246d086685c52882ac1c703e6e4962e3c4d3ba97c418e4c88d6256b3bbc442. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/QZLL92342648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bdfc7d364f7bf8caf7c7459570b3aa498bf16d1772708679c5946c15b57c6a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZLL92342650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5229ab2a7cc2370c4cbc5b79776ea055d49dad0a23516c921fa7d51ce6f4e41f. 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/QZLL92342652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a75abc08114cfb42a34b3927e354b76cb2225f38ab98742b6c490b079da7cf. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:21:17Z), 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/QZLL92342653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80448560c6bb1fc06a0967babd151f28400f230ba0290b4630a4f7b78896985a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZLL92491453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b17524e9e304222d227b485f36108eaafc60c905ab2d8e294f93d625be22826. 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/QZNB82464481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2172a8f551f0c4c1bc3fc20b7a5ac2997cef25b6979be81e0d46657f26fde7. 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/QZNMT2459626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992646b2c9943a6116b249951b653d05baac652401f1c13c42ff0ee4bd85fb7e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNMT2459627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4260f45674b0dc26cf006ec8c88421ce1b93cb974c26bcf8a70ce006f0d659a. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZNMT2459628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929b646127fd3633743173e2e7b2aae5db33a8d98c2e305a2c23fefa89e944e6. 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/QZNMT2459629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b8aedf62b197ecb0d7fe03efe88247010ba7e0dcfc2eab413e166cc2c3f1e3. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZNMT2459630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2038e91a9ed7f71c84d6d4efec864a2a615843f90123b4983ab4050db82f6c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:39:45Z), 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/QZNMT2459632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3aa46028830bef364bab79ebc7ae2549010285f8eb28dd6b149e9f3b2b2215. 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/QZNMT2459633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe537941a0c9621e1bcd3308adaaf3c2b1ab0f316815c142d6eddfa6a4432cdd5. 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/QZNMY2403118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d127e16be13bdb0193ac9c9fb0088b169c9ddff093480881abe76ee36d4df3e. 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/QZNMZ2448389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d391a37603ece9ecb11217142eb2c985766cdf4abbee1581d307f4c781fee. 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/QZJG52547609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecad6e983cc41f9143edb3bfee3fc6dc763802c372937b56307a7f70082a5c51. 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/QZJG52547610.