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 0x10d5f6d61f388f82df854e45116f6d9323fc21dbfcdce85ca31175f1e02be13f. 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/daa3c9cd-7e62-49f2-b4b2-6f4d5cba7ca0.json and https://artists.proofprofile.net/proofs/artist/daa3c9cd-7e62-49f2-b4b2-6f4d5cba7ca0.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 0x06e4b5cc38e5970d942600b9f992d834136b62ccca2a642b6ba77335773eb248. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCADG1734482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4612ccbaa2833ab073cd6ae6c6f1d9e2459e7b534dc98ac40c9406dac99d499a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEL1954348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826d478c92af4ff1c637facbfbd2fdb2d796424290942d50839e273f068ac4c4. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:07:38Z), 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/TCAEL1959852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d28dcf9ccc71c510759f521f17a5822953d615ec1644a6118584a507a188f6. 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/TCAGL2213049.
That's What You Said Last Time (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d823885ca17ac9c85caf789e3747d03e1e2c04f3dbfbe055dde8946efd7c08. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAHL2302686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706e80e855572afda5f8cea7a3c0e20ffbf3860505bd5d083e49e15e1b42f71e. 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/TCAGO2277290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f28db25eb4f4f6a4e0218157a8c82bfe236357377f21cf49a124a5136f2c2d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHL2302705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad0b1a9f90a406d7f0d0b85efa7f89e828bf2f65ecab6fa3e27a82f853ad761. 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/TCAHI2302908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49329870fd18340a440888e8e0cc38a8b6681f7b85b488fa77863e64da547220. 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/TCAHL2302724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483156721d3722d68385b94e2b083ec9e8c7746eca351e37f5d5f863e860dccc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:01:02Z), 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/TCAGO2275990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb1e062d7ca48249da0a0ca927ed6c059bfd3f534cd1c88c0bfd274406a6842. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:37:52Z), 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/TCAGU2386647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e31cb3bbf06a83e63b4124b2900559d0243cb6271eb31d6a9b6f38aea5e94de. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGH2261072.