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 0x913bfc3eae965cfa334d440f873ac4691ef901f13ee4808c87ef35e7e260f5ab. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81f9f21a-4312-4cf1-a3c9-9ed5e2a46370.json and https://artists.proofprofile.net/proofs/artist/81f9f21a-4312-4cf1-a3c9-9ed5e2a46370.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 0x27948f24a3852eb5d70c9377fbded13a4970272148d9bd9d504a971b198cb641. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/USL4Q0803245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f655c20f9f40a4bea831b4dff59eca4d31d6ac960cec9682100bd8f63d4a6c8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USL4Q0803246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7126a28934691e2b45dfb742210792d9941150ccf91b880a8571b0b2a14e619a. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USL4Q0803247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cfcafabdd8c7a771d5988a938639176c6b691c0b15fe4683acc35f2e72c83a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:02:04Z), 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/USL4Q0803248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1452c1478d703c6486c6dc9c0401405ac9c64549e89fc0a37a512da070181e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:23:12Z), 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/USL4Q0803253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab30d200680b8cd0d6a7540ae71cec2335f82b873e869d257c004af8b56a5d24. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:50:17Z), 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/USL4Q0803255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ea6b3f7c83da723592a943cb782915d4507137f06ce899b24aea21954455cc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USL4Q0803257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983bac0a59654713b1eb61da2e8d79806ef75c8000fb83e3b4c0b0eaf60af592. 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/USHM91116271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f78aa0e81209f1fd1c1c4f4c1b76e840552d299fd1d50176dabd5570b3997d. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USX9P1450661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8310cc9e10d335e97b0f513bf7133e4420a0c33dd3a044fa5143dbfda963414f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USESK1329167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee060aaa77686cd04d8f2493999c3ef9b56aa9f7cc69366e1995e2ec7ca871cd. 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/TCACS1644272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c49915d3be667fc8d2bf5d0f4c75ab16caba02d18476cfa79f2c499bb69e6d5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACH1502113.