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 0x3f774696daba2b001884639b96d97ef08a513884d3bcee874e71ea11a2facb34. 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/acc25158-8dd2-482e-a320-554d809bfcfa.json and https://artists.proofprofile.net/proofs/artist/acc25158-8dd2-482e-a320-554d809bfcfa.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 0x8e84bd0dd484f2c342af0a993c16edf04d0f0186e5f26236d775aa95a557045f. 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/QZNJZ2386277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e54154480f36c3d81d2f186078b0c72d0f92d9652ffb14524e1c1169e46ed7. 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/QZNJZ2386279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74d72b752a29760e7297889ba4aebfe70816a97ed39251c752cb3f7d123bfff. 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/QZTPX2216428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78ccbcd2e0910f6be5e99ffeb03e3f6d2403890a3bf35756590794d081aa4b7. 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/QZTPX2216429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56176b8138dfb9e32f9f4b6bb02bfedcccf9c3b4a908e84eb13b20481dee767. 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/QZ5AB2229226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31952495672464f08b032aafef50bc651968a4a5b50eb86747a7f0c98bbde34a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5AB2229230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8f41c98c23bced7b3ad05993b56f629e06b683c119f7fc96751280d6d6ff5b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5AB2229231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5160dd9ba927a20039463f39ed06c4548b021b4d1386f9f4be9951db001b6747. 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/QZ5AB2229232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20045248af66d3af75603a60e7d2ae1f63c4e4bb9f149baf16fb91317d4657bb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5AB2229233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d629df328af0ab73ec9a35ee932a4a1b33d905c9ff5f6df5c03078ea623f41. 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/QZ5AB2229234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fda7dc38c836d7773b4ab83c91987d08802973a445717bb00b770280ffb89f. 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/QZNJY2141091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a5a119a38f966d1126b63e93749ab68df3c99146341c4060693e81ad5e2698. 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/QZNJY2141092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3742cba9d375f9ff68d46805bd7af911facde097477d7737364a27aa9d4291b8. 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/QZNJY2141096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa04333a85ac37e708feb75874f1f325f27b79856e38b77d00bf2e930e7fea42. 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/QZGLM2130276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74d72b752a29760e7297889ba4aebfe70816a97ed39251c752cb3f7d123bfff. 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/QZTPX2216428.