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 0xa69003c7d0261a046ea77572b6063c395bfbe0bb1b1bf5ac57a8b8273e47e21c. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35667e46-61ed-4737-944c-3ad50ecc04d2.json and https://artists.proofprofile.net/proofs/artist/35667e46-61ed-4737-944c-3ad50ecc04d2.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 0xf03361f83286b9d2114a91af2af1525da66c2bfea213672af2a28c05922b6e3e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QMAAK1912449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7ad3cbb27d09188a2733df07add98142ed55810c22b40981dbf500052f93ac. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMAAK1912455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f8261263c2b2a1d0af0ba80c93744dd38f511efd57099cbb649afce8c38049. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QM9AA2052675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2564d8e02b8075935a2e1b3f9e0f33a69b295200013d982e244e209436bdf3e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM9AA2052677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c1afed60be188c10f4716f08acedb9a0237550c98f4ef25d26360832576f97. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM9AA2052678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cebabc0d157e09baa38d3a87a22478e11720416aa4c4db828bc9c3e09a54f9d. 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/QM9AA2052682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f71d90ee50d31df7bdae16cf26cf446606a20fbcd0f6c1f521fe885f62204c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USDY42428474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb06e2961c6c89e07e53dfd70a7f3e2d499d613f8fd780d2fb05ce20981f247. 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/USDY42428475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514737972581a61d674c09229519bdb9b1bb32e2422f7dd2bcffbfa736b86f1f. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:35Z), 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/USDY42428476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b6e7326b016cff2e62f87155ad93b7658103bf2cd42821e81d9bfa835019a7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:40Z), 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/USDY42428478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a8d67ede77350d5d87130746430fe91ff55d9e03d2cd0d064dc3f001f4a4e3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDY42428479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda64765e0bcb76a66541949906a3df54adef78dd7d4e957b0de775261adb915. 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/USDY42428480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ca0175372442421007bb421b22a2d1fb2652404f7ccf40a126adf0186e4907. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USDY42428482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411db3c628e1d436964c49718687b15219dacdc14d415b3618e686415db5232c. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/USDY42428483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4314bc093f793c0e49a63e2044ea3ebef4f9fdb3b17bd2c1273e08640278d3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US8JA2430001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae55165b26fca105cc5bd736e47f4f2f4ee3bca70ad6234dde7a17e6bd1889c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US8JA2331007.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c196ef5ec1a1756da973b8304f6ec91ef02e021f0ab663efbfc4f52c4b839c. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USASN2320429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20cf842448a89dce393970aa9ae36fc614672b3d9f52863f6020e4e7463f666. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMDA62404771.