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 0x4325448847ea5126b8dc3f8c41266f4c0cbc4720c8d5a2ec622bfca489c3861e. 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/f7f95b6b-68b2-4785-8a28-7a5db0d0bbe8.json and https://artists.proofprofile.net/proofs/artist/f7f95b6b-68b2-4785-8a28-7a5db0d0bbe8.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 0x56539a7143fcaed687550c862c44e43fbec45a6eff6509d85d72f1b3866c4742. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX5MX2347102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3869a5f97346f209c275c6b871c6ed300267040ec14ff012b6eb6120dfe61996. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM3DF2252027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb4b5b0adcf7a8db135489016316ba086b32a6972e9ce85aa73ff9d344bff5b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMHN2372730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1bdbfb6900642562f562b5c410eafc49d906d6c8aeaa09722f668a8a26f290. 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/QZMHP2376422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1668b86351e4b1289b983026a55ec8bea7807b49d8e956760db007f7ea95f614. 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/QZMHM2395527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d5639e4f5e00de31f93310515150d01eade532afaf7be8345ab2596a449681. 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/QZS652275145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c15787cf1e4fc8fdfe8fb6fc358c7bc936ce271a99cef1380a6f74bf331a306. 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/QZS652487722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737e4276faa618c09813e2ccf7cc2f24a62db1964692f49e65ab8465ddaf04a5. 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/GX5MY2377413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be741a59f6f2c42e478820e5105811af97e753a538b0943f8045538d9406ab5. 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/QZS632317903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67182ec16676acd7992ca14c438792297298f6b7a833d491d3c7cdac8addac51. 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/QZS642358076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb834103e10b1fc4c7bc3bbd96f2f87d845d0b50ff856c5143b5c90bd36fc82c4. 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/RUA1D2347667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1bdbfb6900642562f562b5c410eafc49d906d6c8aeaa09722f668a8a26f290. 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/QZMHP2376422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1668b86351e4b1289b983026a55ec8bea7807b49d8e956760db007f7ea95f614. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMHM2395527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012d57c63b206dc2449e1132c8a122454097a4b4926e0975c38a80dc8ff5737f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GXESV2484484.