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 0x405ff826c7eed95a198d169eff42597788b7ecdcae62fc1f59fa0f9fafe40f0a. 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/35221738-7f51-4467-980a-ad14f7afdaae.json and https://artists.proofprofile.net/proofs/artist/35221738-7f51-4467-980a-ad14f7afdaae.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 0x4f578b2147842fa41e9ad251212697f3c0849046350927d42b2e95ef11a88e56. 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/CA5KR2069665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d2e673183df5f7d3ee0aecd4a13de4d7b2351d79736501129dcb77f30744e6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2075216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf5b156e524313990cf6d37adcfce89e49b886769b6c4a8e29ffd27ae5fc3b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CA5KR2040043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6a15b3fed73358cf2ba754512fcfad001b0c2f7a7129ad2abb86d12469e9f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2075220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd882f751447aec4d185f789bd3512cc92abd809b4b7f90e1767626a9fe0de2. 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/CA5KR2050474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a45cf9de5acd021ca26627d6317cceb722da4eb76ae46af8d31deacca3ff35. 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/CA5KR2045347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775cfe7c828462ae674bad6d1d2466ea4708418ed92f2f6c1910b265925eb8af. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA5KR2075221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e36c510e3e60dd4117fc2e3fc49a550f10a07cd94e5d0477b66e827804111ba. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CA5KR2075223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3097914748c579aec5077d0d23d578fafe7b80a4b16fd44f0aea84d0d1fc6c5b. 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/CA5KR2075224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0486a0f5628f624fdf29095d85f173d2b08f76903d57c5fb89f604143bc079f9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2257433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9046314a4afdb8deea831095777fd6fcf83163c2ab5998853af9838eb9393daf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2180563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f578b2147842fa41e9ad251212697f3c0849046350927d42b2e95ef11a88e56. 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/CA5KR2069665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a45cf9de5acd021ca26627d6317cceb722da4eb76ae46af8d31deacca3ff35. 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/CA5KR2045347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf5b156e524313990cf6d37adcfce89e49b886769b6c4a8e29ffd27ae5fc3b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2040043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ac2de46eb6961c54dc3dbe8ee512b8d0071d96396373274b3ccdf0622db8fa. 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/CA5KR1810105.