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 0xe8301891bd5fa557c48c0fd65bd17509274ac26390c6b24eaaebee42c1290f49. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1dce84d8-d5bd-413a-ba5b-f27a108e0f92.json and https://artists.proofprofile.net/proofs/artist/1dce84d8-d5bd-413a-ba5b-f27a108e0f92.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 0x52b07715217323e11a482d5d1acdec1d084ef1b92392b844dcbe1e5e99d81d11. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXD7G2512945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435d3ff4e0831b618fc590bf81f94989a0af8955d5ce08cb1534b73b44df7bc0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXD7G2563469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad3d5d67725f6187ebcff43e689d2c86dac94bd8d0e26280fbe67e57149ca65. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GXD7G2501981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871728b801657302a80b33bf9c407464d2ea477f2a05fc506c4a7c45036f363f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:05:00Z), 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/GXD7G2545411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d5c6fab435a57fbc393b79ff6f116678af7cd1cf258d48901d26ffcc1b0749. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXD7G2521576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12adb9c04da30d64fd212a7a07967a847d7624aa4dfbb25538f1dec8564704e. 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/GXD7G2508329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3929521a6a2bef984c34a3fc000f52261813fa6c9adc1d41d5c7180c96d48dc6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXD7G2522435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e65d7ec0cdd4b90c97ac57ae1deaf30e80a3ed3eedcd53961f8a14816242bc. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXD7G2545985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4597f894bb413d689623249b99562c54739a6e9be36e28d15e264a7e8d3d7db0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:26:37Z), 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/GXD7G2562140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd89a696fbdf9ef38fd76bd1d286c21f4f36e1a7ee3a01ea66b053a5a9b51b3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GXD7G2580749.