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 0x3b496e3a39552e59b093decdc31289ff280c745dc1d4b6bd432861447216f0c1. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8689fe2f-1e2f-49f8-986f-fd2719d9ca81.json and https://artists.proofprofile.net/proofs/artist/8689fe2f-1e2f-49f8-986f-fd2719d9ca81.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 0xff8c5e64c6563eeeb1add8d1322b9a671e8895e2db0d0983acb3480f1c4241f1. 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/NO3S52101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311c8414929bd3f94ff5c6903aad173b44398e7afd1907110f89f5cf7e1a6b05. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/NO3S52001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445c08c230759121cd03696c2ed67138fab9589c7196981d8da6c592d25e6906. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NO3S51701050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc0285d97357a6a2e880b79f1ec081330c759333ef5f920269d6dacf76968f2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NO3S51701060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2cac836a027217770d8622997e5bd167c5cc25a076a6f8237a64e5bd5aff1a. 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/NO3S51701070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670fc080f2a17ec9c5e3ec9ce8886f5b28759dd17051c0671985ebcb312b5213. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:03:46Z), 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/NO3S51701030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725dc0019ee300f154785460a3931ce2f8ae66f0a933c33b4e1269fd1dd05d39. 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/NO3S51501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc68e2057c8afca8a3e4934289c7e08700699b85dea08ede536cc0beb8953e4. 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/NO3S51501060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf185b129314d4328e03f0b7e56d8cba3d017335149ddf4d00297b0f353a26a85. 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/NO3S51501070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f923679fc6264d3891ff447bc2ac97c86726742d6d71a07f0056bcf4968158. 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/NO3S52401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ba1039600dbc50ea46586266507d6c06a623c45c171bcb257cf2869c53441c. 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/NO3S52301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b87f8693bdfa0ed6e6b66b1b5dc0b680500b1f2299ac027f59bc84db02505f4. 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/NO3S52201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311c8414929bd3f94ff5c6903aad173b44398e7afd1907110f89f5cf7e1a6b05. 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/NO3S52001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3259654480ed1084627b41d729e1968e40453b5cbb53cc08ca1f76cd9e6b48a4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NO3S51901010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712b258961627c9d1c8e2b9ca304d45f3abd90450fff16c85a63db44479bc640. 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/NO3S52502040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16449a92596f9c383b05bc2ee13e2a80b98b027ebbf22b3e19f1219a608b71cc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NO3S52501060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc923f1dd01083ee6f96dc50ce629a40b7197ed02ec1aab95668d08f280225cdf. 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/NO3S52502050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5901af13e4fa63cf812e3a517542a690c4658db3661532885e79f4b69ad3d005. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NO3S52502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd901a7011db4ccadd3bd8064c1d68673a2882d7ecf5c2de560ecba67c523b399. 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/NO3S52502020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22078c205132194545dfefa6a4c676dc621bcc11c4565324f66493fc7c5e665b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NO3S52501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e3369e6fafe1383a64b8b5d0388a06d4aca2e35838a78b33645c800f43fcff. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NO3S52501070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bd1cdb6a99a65c0e7f142968fa55cc2e0b59f4f6d7d5a390b7c113c58be016. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NO3S52402070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c9ea4d88edce3605961f8e825655e60f6564f0c26e26290c0fe0793643901. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NO3S52402060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee229525d87ee716564860f6d60ae55361c3fa0bdef9a2091a5e07ab425070b3. 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/NO3S52402050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251616237a71e5dc97a4d4ae7b7eb6333cb8e8086d0ba4a00079c7bbd4d38763. 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/NO3S52402040.