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 0x77deee2d0684b1932e2559477dc1354cb8c699095344da0098bf27b05677f966. 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/c5588668-2772-4832-89a1-2859f5b262a2.json and https://artists.proofprofile.net/proofs/artist/c5588668-2772-4832-89a1-2859f5b262a2.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 0x1d76d38cff746911b6074f0a9ad8e9dad0b844f43a03ecdfa4a95f53b7fb9c2f. 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/CA5KR2295614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83571585c3771180811d2fdfcefdec4af2074b4277d1b195f61edfe0b15ec40f. 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/QZK6Q2299338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4d5e12375d677ed78f232f5529d55b48a1fc4ad151626e4ebd12b1c9d0a6ab. 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/CA5KR2295617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44001c4a3af6c2ae141e36361ddc12ccefb218abba944a8816590c5924d8d6c. 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/CA5KR2295618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb839d45e61ebe28c8b7768a64498d8389fd4c2498538938c5740bd50d5a6f33b. 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/CA5KR2295619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bebf4a451d314aaa757653ce07f0046f4cca69a8493f6f4f5323b909a1ac9d7. 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/USQX92002517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f068b216bb1445af74808e12f20d32285be908fdffe3f8d7e49f33071d58bf8. 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/QZFZ31945109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f068b216bb1445af74808e12f20d32285be908fdffe3f8d7e49f33071d58bf8. 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/QZFZ31945109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc1aaf1a5bb23aad18539d4832f7daf366d2e3894152145f7d39a47fbe95e4b. 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/QZK6Q2212862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa37d42673bc80123de5741c037a1ec73e254cdbbd4632f09964ca3b5c207cb3. 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/QZK6Q2202965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9d0a2fd03fafd0287d94f269399076dc8b34dcd9d59a99ee1127b3d0e2a914. 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/USQX92003611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe716360e784f3fc5e5aec02263e434b038abdada216cd7f86e677a025280e390. 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/QZFYX2078157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5fd9584d4dd15a07a0cea43f74c8b7b1679bba37341fbfbe792d426faf24cc. 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/CA5KR1973278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14807374b0f536933a71dd468c757677ca1d2078d696ede01669d994310fc877. 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/QZFZ41916174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e37fa60dba80b606307c4b7a0644328db3cb848923d01dadb2e2f0b2e332e19. 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/QZFYX1957483.