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 0x4689044f64d315b031c1622867203524bb8e166e1499654331c78e1bc5a67a6e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be9338a7-9786-4d03-8762-a6f220ce2a1d.json and https://artists.proofprofile.net/proofs/artist/be9338a7-9786-4d03-8762-a6f220ce2a1d.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 0xeef0a213f4a7b82af98020a70541f1a4f2e99fc11e68f29f40cfb63a5f8a0806. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZK6M2506619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dbea8f64760bca44888a1865ecfd61f901cb7cd4b0de21a424c36ae3fc5124. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:49Z), 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/QZK6M2506620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ca5878790f638e5c0f080da9200238428788a106d0247bfd6240f2e7342ee0. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6M2506621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cfd4ad1bbba618d9263cbb4f668994d2b0af831bde7918f4edb34674fcc5de. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6M2506622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb94d001aa4c9bef59a727f2303694a7144bd8dea2b84275b1ba4d92a4a7b86. 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/QZK6M2506623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa789201edf8041d027276d0fb99cffcce7a13c44080800f438e63550287f1311. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZK6M2506625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd643efc8c9b9a0a0cc82b4ad0a0dad3a967f3773dd36b1fba0c6b82f0e0ca3b0. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZK6M2506627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6504547a514bc4d7a14576889d69a1d11748385ff3964652d69a6ef5bd79b9e3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:02:24Z), 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/QZK6M2506628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa530d50d99b595c23128081627f71256649b41bff93785475b2b6a6f8f1cd8c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6M2506629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e07a60dabb3f193653072e6f0e78d0e3a22ba4e6299044ad62f898b87d5cb9. 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/QZK6M2506630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f610421456b6d176dcd6c084fe4dca6e449abad532ad15f2eb8e971bab1472f. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZK6M2506631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bfc931f9eaa74dcfd3654c438065cc77caf0bc640d8e597c6841d5734f60b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6M2506632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6b15fb5dff0dbed8111d3d16d20acd72ef0e37a2a06204f76489ece38a9f9d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZK6M2506633.