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 0xffee6584558b0c0ae2bec98f3b59a17f2e123ce10288323d22e15ccdccd353e9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6cbd95c-bbe9-4bd7-9159-9f57219cf34e.json and https://artists.proofprofile.net/proofs/artist/b6cbd95c-bbe9-4bd7-9159-9f57219cf34e.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 0x70b3d56f8a9d1a8d07119e2eee6681f75ace3bbbbce1cc39c7b8e68513d79551. 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/QZ8LD1769838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa4c1151d0d4afe535ca0df03cee2cb775ba9768a56a1174e4624d849688371. 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/QZ8LD1769841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d83de680feb110e2d383dd55d54d4dea246fc974c60903877e7f3c26ded15a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ8LD1769842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8c453ba69a87b2f80d6569306c1054d040f71c32e2ce638392668a6adbcecb. 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/QZ8LD1769843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4382245e65a0a02caa2f3ecb66328b911796922ae3c41d13939802f2b65093c1. 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/QZ8LD1769848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd661b6913f54a60d232498a306fabb787800bc70cc937bc806a6bc42affcdf2. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZ8LD1769839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c9e701eda5901d20354dfd6f7646719b9eef5d03853f4f38bc89a7bfe878dc. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZ8LD1769840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b89e17b34ad662cbf165c3e034ac3b8312c1fdc44a0e527b3be4583cf07c4b. 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/QZ8LD1769844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee1f53861da5058add0625929d15f91593345b40dd8904bc242cc23844573ff. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZ8LD1769845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4172f7d04ebc0461219797d71d6b3aa08a6aba1fb11536b1d83e4294cd140d8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZ8LD1769846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8482fb50593e68041f80594584b446135a8b614207086721371f4cf64e49815c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZ8LD1769849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a922d9e134874fe69fd5426d402a076f366431cc97757e44980b91d96cdac83. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QM24S2304967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38e2206cd14d7e2ea12a12f123269e6608552e445b17380c16d8c77ded2b334. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM24S2303401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e300b00e91dec1dd2ddd052e616a1ab4324e45bab4176ab90a986b91571f04. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QM24S2303353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880cc50be52550474d562516b357573f3e7bc736c79f903c8aac0ba30e230bb1. 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/QM24S2205613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0301a46880b2c63faa3096196f75ec316e01c4b54e16375a60c5a36974bb9087. 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/QM24S2201350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65732f8a37829c3a3b12bb1ca05db04259597be3dde3e5fb651bc65edd72e43. 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/QZTLA2212799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebb869e6c66240218f2879eeeb37b7b519d777b54e8cff9d825a4147f7b5233. 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/QM24S2011475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc339425ff510d72ae6e61bdf85692c37d1c560ad0e9b38125ff23705aef56cc3. 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/QM24S1816434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6515e33c1b08d607dbfda84c67a3cafc398c1175ed84348b7f331ef8ac2940a5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM24S1816435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f1cd095dbf522117859432c97dddbfb4f1f023f901623dc9684938ad7fd7ae. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM24S1816436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22c4cd2dd852423294ae97fd568276cf513586fe820dd8b15658c377fdda5ba. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QM24S1816437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0698736c0b37eeaa6d4b03c86e57798649578e30002f5772fb8a5bb1de443aff. 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/QZ8LD1758027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217be5b98580be884b64c4847c780ebbdd5529f2218b79e7792f83f185c61988. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QM24S2107241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe784bbb6ae734d87bfbaf54c873c1acd2bac46bb0d74ad8acd4503981772c3a7. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QM24S2107358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217be5b98580be884b64c4847c780ebbdd5529f2218b79e7792f83f185c61988. 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/QM24S2107241.