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 0x887feba84d16abd9b58df93976f3c95cb7f7958c16b39d673981191b760c3275. 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/601abcaa-4346-4e06-a6db-fd5753d5f4bb.json and https://artists.proofprofile.net/proofs/artist/601abcaa-4346-4e06-a6db-fd5753d5f4bb.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 0x4f87d011c89f29531291148e3d491c78efa0f719406a469fff01198d7441e612. 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/QMFME2055200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5428a499a6d69583b730c90f84402df81ca9012576f015ec3254117aed9f043. 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/TCAFE2091846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5eed40666dbd84b131683850ef026218daab1ae4beb484649f03dd045ec4e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESA011637440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1c8b25fc9b304a1c2e60c1713bb4d013e26723a391b151c22bd0e90212c6f4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESA011637441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d614413d99025230cf2eace253910f7337e8cd57378c1f42b59bb1a36dbd59b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESA011637442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb533dd605236b0dd924df79dcac32a30f0202df0abeabf2d8f37e9f92ff2fac. 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/ESA011637443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25127db30fafcf3162037bcd48c7a5b39ecfb434054eccedfc1195a26a5244f3. 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/ESA011637444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6406d2e64775b47ebcdc4a7974f5d3426dd449ded4c40ed969d8a1ce0b1397cc. 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/ESA011637445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16d487931212f3cb7f12f31ba6ec5a3104f408fff7765cbd87db54e435c5ba5. 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/ESA011637446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7782b819f2251c80955de5d1e53adb76dbee4e87647fc82dd449707eef0621f. 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/ESA011637447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeebf51790b09651472a3e0846b76f0e1abe46d1c85f36c7b9a705294f5e631. 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/QM4TW2112161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0afa3558de5b474b0fb0f6f95fd4f6591c68188d701b2962c04bd1a23a632fe. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNJW2211980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485388146b143d1c6ef904206e9988c716804235cb3e33e2efb6c123016cdbfd. 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/QZK6L2299602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c93e349686bae8fc83b85cb3cdb42fdc8fee1440aa9b14989e708b10e5c291. 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/QZK6Q2227059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd7a68999d9fa964538179caf953dd0138e121328bdb84adf61890cd93ffc47. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6L2299603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484359169b4055b4dfa06fb1c279a14c3a05bd2e48f1b00e99523d025bef90c5. 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/QZHN92210836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb094bfae87788fc270de9243c371c7c9981ff7ccf6f8a62113bdde2758164f17. 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/QZK6L2299604.