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 0xd9449bcced5b27cecff3cc84f0eb74ca670e63d758eba298b88ffebdaa1bbd84. 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/2360dd8e-1596-4626-a250-90e1e277b251.json and https://artists.proofprofile.net/proofs/artist/2360dd8e-1596-4626-a250-90e1e277b251.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 0x29c77fa1ff03b07c77162e58b97034e986997c722a38566d22683d5e27b3c5a0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GBKPL1253657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b22ee37bf7b5adc8727382de11d647523eecdc0941e9c837b78567cf4d2ba65. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBKPL1253659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542848f0ad8fd7c98cc18ac5af2e49dff779029e86778813488590f8f19a21e3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLCK41041178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515f6813d64f3db707fa97649952e87c123eb67340c07ae2c100bbadbff0058b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:19Z), 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/NLCK41041179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7805a7a1b2617fb9bd6e80ff31055e59539debec186e53276090b75677ebf61. 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/NLCK41053077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd2ac0bedea5ddd6f2ecf10341a2e497ac93cc8a423c8c7202c4a1d85309a6c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:51Z), 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/NLRD52355230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3d5b0c6bcd76430b44d2a5b11b610601bba1d8e1e581efea297ce6355f9dc8. 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/NL3M12412362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02503437dc7ad5b0bacfe96074db00d9a2a757cba7c1d97ed6bff99c969f432. 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/NL3M12412363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257c43debc879ec62c67d2a8423faecf9e213628291dfd9e868fe8a706b5047c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLCK42504259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4c3244586eaa3c44d6c15be9e6ed3554632d621a4522fcee824376dedb5228. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:20Z), 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/GBTMZ2501319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8995e16094ce81c5247c906777584519a7bd5e8845983ea0e57e0849c4f74c79. 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/GBKPL1669461.