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 0xc8f8736cdfc73da8cbd341b62e64445b6f3869ca18089c273445854c891ed867. 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/0011a96f-205a-4872-9fed-c10e9b7e9413.json and https://artists.proofprofile.net/proofs/artist/0011a96f-205a-4872-9fed-c10e9b7e9413.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 0x62782636f009fac9b8004f0b9da9c02fb628de796fa986679c08adc6e3a9087e. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/ATBK71203309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1368746ccb4da4130a41941ae074646882bfcb4a8e36d2aaf2523ae650a7c9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ATBK71203310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0280e71dfbeca9142f53b303880100f63603752ee41d48ec8d9f565df58b459. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ATBK71203311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a902a549efea0d4ce9a1112795d565afe7f58564f96ba64701c273416455b99. 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/ATBK71203312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8826e923b43f65ae20b53e8bce0c988101187d0972c09f78b47fffdf289b2986. 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/ATBK71203313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa229a23fecb6fb716ba4171fcefa59155c2053b13dc3564b7182c21166b78101. 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/ATBK71203315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe11bbb7c0b2704b0a83a120ed7496f4ab511b04a2a6ef4cf83903c8c267486. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ATBK71203316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252234a362f1f400f4aa53b79ef8663054e50d8922ea812aba41e2c7aab3a83a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ATBK71203317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912c80a1bb19ee06ea2300819c5f2ebe8ce8ed2a138f1406486d125f0aff0eb4. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/ATBK71203560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46ff9487ea6c761722dd391c32f7eab7119830881c83cb8f244fda4a86b29c0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ATBK71203561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b526b04c116f0938e067cbda2d8a269e4c8350301f9c983d3b4361020738fc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:46:32Z), 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/ATBK71203562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716cc770e80dd449b9fada63af6086f09960bc5ac6a03a63d22d9538ffd59715. 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/ATBK71203563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3806a9c9f03c9af595203f7e813f13c8921626d8feb86468751e6b6d39a6133. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:24Z), 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/ATBK71203564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674cf9b659bdfb8b549f9252970672fbd9ec2b041c676ea28c87cdc8eee259cc. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:03Z), 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/ATBK71203565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a45875779665441a601554ca0112a9db750cfb013105d7c9c7f6782c8334ba4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ATBK71203566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1f1429e2ba2345a5278cc4a7ba17b781859c2832b2d9ad1c8acadb7d85e977. 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/ATBK71203567.