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 0xbe7bade6088021eea98acefb54b8e74b4be87770a846d5014490bd685ef05d5b. 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/19b63d22-ccfe-49d7-b56c-de5fb5b16e3c.json and https://artists.proofprofile.net/proofs/artist/19b63d22-ccfe-49d7-b56c-de5fb5b16e3c.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 0x407969307cd3642eca72bf6332961bb509d149657f00995df797cfddcae9f0df. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFZ72062397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d5df0421dcb483e0e434477751f6c50116a1f3b92cfc58a60dd2d3afe3e353. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ72062398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7090f315fa8ec9b33bb50d304e5a847bd0d1f28ded8e3ea4849d3f4d6920c84a. 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/QZFZ72062400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80911d08651fc4b5d72d227496cd846d9d9900fe0711a7dc3bda3794abc072c9. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN92057356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56a5bf172fc401f8b6b1814834b6bfa7d71985219171cb5626ce27f71582875. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHNB2001105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0f130b985c12808ea2827866af2343a65a77780fd21002797f528ed205c138. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:25Z), 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/QZK6Q2090765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fa47d54926c22884561fb886cae44ac99a71449c8e6ae1dcc18f82bbd8c2ca. 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/ATAJ12100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8da889b8d109fd3f8555e6c7e78647c0225bf0ffd4c0290721fad1e71409e9. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ATAJ12100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f5a9a9e80202d05ede41ce60757e03dc84e59d31d9cf468b5cacb1050f8fb6. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ATAJ12100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d9deed4886299ed032c3cf9637d3bce8975860608f161c95b0ce7895fa98cb. 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/ATAJ12100655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435ed591c0435aae736c4d9c9af5f85c81d931d19f8d580f447a9cf84ceed0c1. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEZC62206258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25efd94d6db20fa334b33f9d5d8185f4810d48542e62ab9485ef0bb2ea6d98b3. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/DEZC62318450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e15368c9479e273c1e80ac65e8fcdcb5f789c53a8c715e89b6c30025e80b18. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62332285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d7b9643ce11ed25f4d0b6a79bcaaa74c2c5bb9e4871f6b665b8cd9fe064ce7. 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/RSA222309219.