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 0x8a67c3c2a4c9062ac32805bd4fdae220f0a4c633839ac37d1a9636b2a59cfede. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9c44ceb-bef7-4da7-b1d6-4db740afd687.json and https://artists.proofprofile.net/proofs/artist/b9c44ceb-bef7-4da7-b1d6-4db740afd687.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 0xc09afbcd04c73ca7ccc7ea9b2f0bb9b6b7c83d49734e76f1276e900500af8c5f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES92131113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a2229b146598f4092a5e6873562be8eda7df471cdbbd6e3dc0cc192562484b. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:56:21Z), 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/QZES92131119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b5d4b9d03bc6255dc0a7535591fa8b2faeb02da0480421f277d84169abf4f9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:50:46Z), 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/QZES92131123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d721c28f7e3f3d740be69c11ea40bc6cece02b8fd47b00200c0c9f61b9d41a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZES92131132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec6f75912abf587083ae4558870f4b286410f5b8525a18a361f7681b16eb7d3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6J2111290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99ac620afd0c25fcb3a3837060150bd2075f1a260a033723658f987be326340. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZK6J2112807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde0294fb73d1e8b24cad3bc7ef9ced7fe3493cb2295ef4ccc56c22def860466. 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/QZFYZ2345654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e2545f60853ccc91158d910c63bf1df98bd0143b8226813e548ecd16b949e2. 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/QZFZ62473201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d898e09c2b58b4ac4d63a059c791ac3d3e1ea4c984842290b861ab896cd7053. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAZ2479274.