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 0xd69de38668cbcfb8ea376acde481ca13486e8a7a777446f328722dd696e4c992. 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/8fca436e-b146-406f-aa12-320501546588.json and https://artists.proofprofile.net/proofs/artist/8fca436e-b146-406f-aa12-320501546588.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 0x5d3b4915df408dc5930f646f04a835fdae8922d501ea4fd46bff268d5a84f88a. 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/QZES61972575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0bf10bd46f72bc7fec9cdfcace73217012b0459c3bca1fea6c8fc269f1d7ec. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYX1944749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6a0a500c43c369b4056dd1691d1ec4f73cfc137aa5c09c3d178414d7d439a6. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZHN51959288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b715a8fac2a33a49adb675f935893d2d6f5e8840e7cff465f990d2c3ac7287. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHN71959086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f64a6c94aabbc5fc047657fcd9a8efc999177a29e0d2af50bd884a7762816b. 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/QZHN52149817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c563ebb3df5bed7ab4164b73672b4b5ffc0f09193debaf8156d57a081a1b19d. 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/QZHN52149818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0f345ccb509fad1fcf7110767e5d062888015ea4dcec12947abb500289b6dd. 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/QZHN52149820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0232176fdff5864bc71fbb9bb2c8c02f47880a218b86ba0b7392bc82c4113e1f. 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/QZHN72301235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32833dfea07a5500c9f68f546b130696a623d8b4a289e05004df7ae1bd985530. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHNA2307353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e4493f7315fd0c0618b1d94771ec3089e98719a1ac193e8558b16054b7d4c. 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/QZHNA2307358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea09b2fdbb46092dad3e23d77093b1ba57ff258d7e8669607f4423d72ff17c61. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHNA2307354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b6d6f40d722c03374607e17e6b6dd308eef85a4549fd371e026da14a484926. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZZ662478116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdb6e31d0a42687607d47fe0a8117181ccfe20d5f91ac79e0d8a692ac42c09b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZYFZ2423788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce4fd13decb119373b23798a1af450a31af192dca1c88d31b04f04b3aa2566a. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USA2P2459038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2445c06723316206498a3b093e4a749e6cce78ff3a44fdcc74b84323226f6b3b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZAKB2478067.