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 0x0ad9c4380eac8f4fef63806a6263aa4aa5c6ef38da8bb0074a0ffa8704a09e44. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58fea30f-55cf-411d-8cb2-002262bbb12a.json and https://artists.proofprofile.net/proofs/artist/58fea30f-55cf-411d-8cb2-002262bbb12a.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 0xabfa3f9972e64fcde6aa8a2ef7d90504aab4e6001341d0c959f69f4a6cdfc210. 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/NLCK42407124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc5a045b7de90ca05605056d0a72a990e6f59ff31c1f4e07c50843f078977de. 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/NLCK42407125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cb9aabdc5fc136a8e98e63ae4a55bf6f540f2ae8da930a2dbce61ab11a4a96. 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/UKCTU2406102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed7fd007e7d74a339b07e5902f5483eb6cd6b5dbcc3f82cf57b2fe04dec3054. 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/GBLV62313435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdfd5ba6e09e2ca316b689f58acabd97e0c83a7db30048e656e0ca351346c92. 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/GBLV62313436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12989cc86768eaa6b20b4a5028a36e945fc4a18b85a3a8a00f35912aa582362. 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/NLCK42236785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2997acc1aea175ae2ef7f15bdfaafc59f7cc9e8e9181804f0ddd68acb17c8e3c. 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/NLCK42231725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb29dbf96dee023fa9348436fbed95143ae451ee67221a10cbbc92b60f889574. 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/NLCK42218095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04083732c6b90798fa4c025285ae0d1976c580a821906a16dcdaba0c7acd1dd7. 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/NLCK42218096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85f0cd97cfd31338470dce6bde79c95a393387d5b4016c118740325fe5f2994. 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/UKCTU2406101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cb9aabdc5fc136a8e98e63ae4a55bf6f540f2ae8da930a2dbce61ab11a4a96. 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/UKCTU2406102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3caa9d0e2a95a4e7450019f34519a4e020496082d50abf0ef760829fd29dc2. 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/UKCTU2406103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5183def33340bde83aa09b44a585b9464d515ebac4987938418004f7685db05. 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/UKCTU2406105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab86348b9f3ccb12fad5a9442b2a2f1c61c44f728f9d75bdcff30ec7373ed5b. 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/UKCTU2406106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27e3cc40180cdcf57d88419ea2e31f6d99e7c764effd6cf43648de28e3fdcfd. 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/UKCTU2406109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935b95c4291489a6cc1b247182c4474c716e3399591539fbf0735677157e0c32. 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/UKCTU2406115.