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 0x5a65b72ae0c1f0ff1248447fedd7019a95a08bb7019bd685ba5bd47083a62abf. 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/f0d468de-5548-4985-97db-e5b4fc52ac82.json and https://artists.proofprofile.net/proofs/artist/f0d468de-5548-4985-97db-e5b4fc52ac82.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 0xc23e4cdbda2b95827090b3400ca5ffaf3f6fadcdca2753918b6f0e289779833a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:46:52Z), 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/FIDT90800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ce8822fb3bdb5a18e6d6953bf5c21539d890e1da7ebc1b6ecfdc34c0ede54e. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:57:57Z), 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/FIDT90800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082daad1d0da33fd210d4e77fcb3fb9ac111eeb8109e3e4821da7a6b66a1de92. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:05:11Z), 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/FIDT90800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b637cc9980d4abe8f92091a82d405795cee1c2b7f6939539707f46615afbb3. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/FIDT90800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4b7b9fd944dbe84ee31382ed3a5cfd6fd10fe47b84ce281d7aad99935d2c68. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIDT90800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be6543121fa567b2b3456f6c6dbcf3e1ad280f32ac9efff057452ccb320239d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FIDT90800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3aad2fa5bc6c9a57ac9df11f43a182d2fe8078632d889af940899160170098. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FIDT91000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94457342631110fb5b3032688aee91be6f828f4756194bf6e5d6199af359969f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FIDT91000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94955ad2d8530f966e45c9e4b351156d1910049b78f8c0fb1b1b4a0d0de340ca. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:55Z), 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/FIDT91000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554ee0afcdaa205fa648aa0847d4d4df804c538b6e44eb2e2dccce70ed3159a9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2P2253960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e288b17da0cdb4d89f91243f0956a2610ea730e9f07f31040af6a3b081595e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P2513270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef258541a6088cf95c2767c910778158f95bf2b2dc5e0e51dc361a561fa61918. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P2552233.