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 0xbd8ad73a08d89b3abdbdb7bdb14cebcd1793da28aa7e8bfe8b4951ced829eb54. 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/3db9d43c-bc80-4180-a6e5-f02f1875dc1c.json and https://artists.proofprofile.net/proofs/artist/3db9d43c-bc80-4180-a6e5-f02f1875dc1c.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 0x7d32a0b77057e659691c1ca79f1d474af84bb466bb6b36e0e97b760e86f5b307. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZEQU2150979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e2d8b7a1c34ea95b70ad4dbc2ad5c66d4c1213760e7f80ba28f73d3c4cb8e9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZEQU2152192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf947a1c9989bd072453fe1eabde9620e28021905ff4a2b80d820b2ebe7b432c6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZEQU2151545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789f05a7d3761347f365fc7b361641e48875e255ee02f0bfe8b92171c523ce38. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZEQU2151546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c50f40d851da0383bdd6558338b0944a88dfbe509bdf8273b075584c930de47. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:11:04Z), 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/QZEQU2151551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2fb8cf099f6dc95edd61f450128c0a4b8e0929a67a68b0775c5a73e2f00974. 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/QZEQU2151558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f63e450f696044b5fb88df50dcc4b24b33be660ff5405d79a4f76d8dfca3966. 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/QZEQU2152064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3281eeedab41874d75b77bb4f0c12a15ddc5ac14f7afa7534aafbc017d04e759. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZEQU2152065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9cfe36b670dc0b37e4757dc9704ba0a21258dff529e6ed0db523e0e8716cfc. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZEQU2152066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a728b9364baece23a7b331cf645d2071dfde5d114e034e776775b056b46b6c0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:39Z), 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/QZEQU2152072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4ed7056611abdf1635484f8150f5808794272e6ad71955c2b8b08d8b52cb99. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRWNK1000466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4022917fecea83fbc8bdc354cd16b67556444ef276f31feaf1a697f3db4d2719. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BRWNK1000469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cc5078cbfb82a64cefd196ae32624b26fdf3967b8f026f3392ec85918a2dc4. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/BRWNK1000470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07966a47693a431bc32a305b0ce8b75cbba4f5e65e7d6ea887d1b258f282c19b. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/BRWNK1000472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3771f5e34dd1fdfaa314b02f85285593a25ebdd4d0fd555f31241a9d7e62ce. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:09:22Z), 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/BRWNK1000473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8f8df6e2cd27b84a64e9583cea3f594b25d1bd129de2ac24897f8b307aea57. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:32:25Z), 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/BRWNK1000474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1756b7697a6a34f5cd786b8c67cf85f15c09d03692f598f2c85c7379506b412d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ESA112319756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09651008972a5c5f244c3009ff8fcdd76fa08736df74168343ff7d4fd29808f2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ESA112558745.