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 0x110221276ffdfff50055061a29aa0d0d95188ae05dab845e129e8a22869c1072. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc510acf-809b-4420-b9dc-3e24b28f3a7b.json and https://artists.proofprofile.net/proofs/artist/cc510acf-809b-4420-b9dc-3e24b28f3a7b.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 0xc172b7234f923bf7e0cfb5ec21ec0b6d7d9c11d2926da5433428b1746ed06a8b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES91813264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d837ac174c76ac57b79b29e6b7361995f93d19ee89ca5c9850f2ebcd8469418. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES91809463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45079ea929bac8bf9447c1f0614b76a15d21146d36cdfd020e1168e839c35535. 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/QZ4JJ1980070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefe305063ecd8851ef9c2d6005dafc6484329fd592e2e81d734869e06a296b5. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZFP51910072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cabef6b954d7a0bbf376c097900bb37916a3378048e0276fff976044e31ba8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM42K1998038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa1397673e3d065e0f1197ea514b7619ec6ea278300246bb808f347af925aa7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:48Z), 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/QZS652133101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d45bf1435fa7cfd3ce75064e37b2b3284d386cc15e67bd0efec6db660641345. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZMHK2493976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce973b88c748efb4ea07eeb4fc93be74e2b7fdf6f21129318a0fa5e4e75389. 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/QZMHN2351286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81e236689a746f998ce65c56fe999c98fb9f913faa6b9a69514c943e0d7ab0a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:29:50Z), 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/QM42K2403912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efb4ea60d3595fdf4de8f6038f9a7111207e7ffb4480ed09855a652e2674dd4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:48Z), 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/QZS652216752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1e45848c13e106a8088d04fa4a8f7334ffa10c60ed725752eae0d0be81989e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZS632241359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eeb2b9f962dd6989459b18057a0c51e9a92154cc6df34a8fa519bada3cc276. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMHP2468883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606fd87b01b579fa75ac234105809ada96221575590fba1914bff0f7b347df88. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5FN1945275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5dfee1403b2ffb89087e0d8140edaffae09edd37815d66428a9f0295dd5c08. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ1992815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fdc94592b777741736cc6ebb2caa9aa386822fb96b86522f4fb1418d710c6f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBWUL2047991.
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