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 0x1c0573a6e649ac2befade2631fe02bafac53e34d0fb7e6d6596e36bcc393b1fc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b19fbc1-3309-4f6b-a2e2-16b4eb387106.json and https://artists.proofprofile.net/proofs/artist/0b19fbc1-3309-4f6b-a2e2-16b4eb387106.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 0x23dfe16ae80c06ca12765f4bd34cae0e873091056845ff79200514d3dc289334. 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/HKG732203447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd170fab514814b504e940323d4ce862bb9ad0a1b91188c7aa437b825a0451c94. 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/HKG731605707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b7214b68f40b46ce5db61041be90e68e99cd0e948f785f126607559dbad461. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732299303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab4194fdabdbd6194223423cbbbdaa8f589e36df84ff55c764d51cac5e3d852. 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/HKG732251480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d709349b4f715f119e257331ea719bf46b90946487ba6dffe6f50de2502bbe. 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/HKG732250818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2528b69f9f425a6cdb7705288732e7a656ab13c829ae8a473144a5e5b2663af3. 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/HKG731748525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebacd030cad08121afcfd2f8a07658881993ef1567f948a4e5030b3eaa596b5. 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/HKG732139133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50020db450c5f6a80c788834fcbab82c21962482320bce26a1ea1079a7508895. 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/HKG732101550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6f8b1b0799d70891b07c63167b2298798360b8fc1944420bfcc75df0c12628. 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/HKG732029372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3691ed10f3665477ca134abb28afab367d482afb89ab7c4b187f56c71b0d5b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732022338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93765d51cc4d3afa57419b3c72a4a0ed1da4d10dc4063f62e98a3dbeed03d113. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732040523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc919e46a5fc9408ef4c47b48cee71b1b9349b6dbcd1d058395e279ac86341e82. 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/HKG732138655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa504a4fb834e88a2fd2c0767ea1d92752b7bbcf695c51bb77bae441c51131c8. 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/HKG732155214.