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 0x135bb1e5ddb65861e5e560489121303afa5080c622c904439ecfafde4d1772b2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8603a4dd-2ce4-4d28-8e63-29f6ea36612b.json and https://artists.proofprofile.net/proofs/artist/8603a4dd-2ce4-4d28-8e63-29f6ea36612b.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 0x83f6adc7bb8f441663f8faf0ecfa8352d57ce37b61d7d41498194a9c6b3f1510. 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/DEPI82217037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d8584dbd2744a78e3290105e423bb3854309fd598b55f73b44cd5bdbc00a77. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:27:20Z), 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/QM6N22549227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2624894a03f1a03daaad93c3c1dd8250eb29b26dde675a31b310e07aa87cc299. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:01:54Z), 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/DEPI82222787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf026c8d74922b46132e36726766d987cf011dc3095fc5e772f902cd7afc31a16. 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/DEPI82305621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01c1d039e13239c71c43683e25c93e315a7b5190305f19dc9d4c7dfe5fe4af4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:20Z), 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/DEPI82306851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe435aa0afbdc1a166a1f3018fc1cda36f1a819166b5d8f166b0b7c0e9f825b3d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEPI82308222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cb3c6694a012fb15b4cc7180bf2fffe0036cfb4870649ca2aba568133fa50a. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/DEPI82318808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4714884d94c553137235f354eceadfe508b515ac1e9bb3c793f614503d85221. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6N22537418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1ddcdfab3d6dcc5439ce920757f5eac103e95cb46f508799fb5bed42d89cd4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:43:08Z), 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/DEPI82436867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ca171dcbb6f9e62ae7f9808943638800c9a812a5ea15b36f1951c677e885a9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEPI82439282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d7b8f0c5d08b31e2afb016707961bf72706c5ac6a1ade460684273dbfa659a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEPI82503326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e761b6a6732f2decce70c522509d19c5e8c2bca357220c39395428e2d368c8c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEPI82505173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12adc9a02bc95d75db945660e6a9d114be82070354e1bb7e081619153c404ab. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:39:49Z), 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/DEPI82505168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296f092037172ff911c6e6dbbfd535e0a6dfc4ef51b96e0de2436ccda18de9e7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:35:45Z), 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/DEPI82507668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f266bc0d8d074fc5c54b044b425995fca18f54e90caac8ff537492870c315a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:47:38Z), 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/DEPI82556750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d09059734afc190b795d54a3678e89f85a0999d2da7077827a460f391dc06a3. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:25:25Z), 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/DE1QW2514044.