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 0x03764b3337fdd2229d842756b104f076c3f4a5889e5763471acf80e9cfdbf793. 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/a553e62b-c64a-4398-b8a1-7fe20066db37.json and https://artists.proofprofile.net/proofs/artist/a553e62b-c64a-4398-b8a1-7fe20066db37.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 0x2d30417d48a4e724be359472dc3a31c97718d8ce70ddda8a4b08bc692aa3798a. 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/QZFZ42262202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b018914baf7c119db3430ef1c5667522af1d583e32cbb774ce45d736c0edd7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTPX2220530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc71d213361db388d76627f530d87d762c347902f88d40e00f1d708f222517d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:55Z), 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/US7VG2305339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fd2ecbe95e0a844265c17485844e3dd9eda05539f14d25ce1845b84348ab52. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN32390841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5140576ac5f34c7f37251f4d4ecb6f63ce18363944806028009632ea6246b714. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN32390844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5a0fbc3fde006a1adbe894f6fc6fa5da0da95a54b5645c10e87e39bbd63d98. 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/QZHN32390847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb85ec876011aa27c03efc6cab7b5eaa82b9b0c853d9dd174b9ba6f38b18b559. 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/QZHN32390857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb44072904c021c968caeee935e83034eb07e6295f86e1202c48702471f1a610. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32390858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0ebcb4dadb6060c2961c54df53db3bb2ad4bba91c9a429e33282fb5b3d2e91. 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/QZHN32390859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102142c992bdb4dcd890a23fa79ab82f09c00926777f077ed97bc0c296ababa0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN32390861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae3ac4f2f88b59642b001d70f88a56193d781063e634eb1a115dbd5e71587f6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN32390839.
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 0x4be010628d5cc48f323b7f103378c6331be0f84f773a11f7e36e42ef8830dc3b. 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/QZHN32390840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdb1fab4b0eed44ebcb563f59dd77a2662bb3a9d756db8c340e8531d5145b9a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHN32390842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ebbb902ad587e6bbcd691c961b60830b482eada4aacaf602259b0a3ab1ee6a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHN32390843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20268a84147f65181216b1cb6561a411c49d612130dc4b9d71aab5c49233428. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZHN32390845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fae7d9dad70e9c25f2d9b0495a33ea8ebfd1635ab3a4e5d1d3a0d9040854617. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZHN32390848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0f852c713ce9adf83d6c4bbb1518c513f5866199a27b1174d203560236c7e2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN32390850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9dc685a1ac10cc1d1417fcb59d0119b38bafeaf6988c196d1574bc66c191ba. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZHN32390854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbbbf0980849a0eedaf1bfede08fa5730d4d109982366deb486e483ad62bbe3. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZHN32390855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60ea3dd7eb0ada1ebe95fb7788af0cd98c5cf627f427e036adcd2cfcb00856f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN32390860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f075618c0a1c2a8801a589ac46e324ca42df7392d8b86390470937ec7e51ce3. 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/QZK6M2447310.