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 0x9a7f4e8e27281f358586d75eb736bd382bae88bf7446f8d1fac49a8535413ead. 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/fd51d010-b5e2-49d1-8a27-917b46f55f8c.json and https://artists.proofprofile.net/proofs/artist/fd51d010-b5e2-49d1-8a27-917b46f55f8c.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 0x342da31030ef01508193d9b0a3a1ac689a383b737ecf012afcb2e66ddaa0d168. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZTB32293550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d1fd417419310440c47b623d107939325e429da8eaec03016ac7a28cc23767. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB32293551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8b45e88b50025bda310ed845e3d880f066dc29bc189889829c7961ab774e8d. 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/QZTB32293554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763ee6da4d775473269178de1a0fb368ef1d8794d9b11f51aa13871ebc74eecb. 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/QZTB22215656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e6911d0d5aedcfae53ee9d6de848bbf97c4b075ee92f798cd216f86e7ad672. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZPLR2121164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ed5ff533c49732f0bbb85419a18b3f56234564404ef9702a8735634dfe0d8a. 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/QZPLR2121167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e8bb3fc951463a236f2645ff4bd10d530aac6aec699ca0cb9638ff4570edbc. 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/QZTAW2297195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3850745a4a26bc585aca6b27735ecb4719ad5b4c12a4a4c402332d19501b5e22. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMER2325632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130b6460fffa385b38bc504a94cf6464c203ae7ef4b3863d1a26164e246dc7cc. 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/QZMER2325637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e681e38d921140f6e6b5faa33c5a672d2e4f0f7a4ecc03b121c33bd37b2542. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:41:34Z), 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/QZK6H2420270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d62bccad322fa11b1b03dd3cf012d9d30ee35c4731658fd7a49a8317a1e253. 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/QZK6H2420272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631eeb7dad6098428361f42c996b68f0446432641211902780d32e0e1da5891e. 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/QZZ792462208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1401b36f85d19b71f26f1f2612f71112ecf9a8c66594845221af4f86bd5b3282. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZTAT2506049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7233139ef02b349a8062f467f8ee2514ff1f8ff1e83c62f5dc25ef029a2850. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:37Z), 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/QZTAT2506050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4546f66016ef19519adfddd7403b904f0249221a6e4a20fcbb29a14e33fad89c. 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/QZTAT2506051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8182e0c35da25022b4b38d2208b84cfe327b322b9f4771e2cb50d994639e45. 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/QZTAT2506052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4228a39736d3be1f19b9e7fbec21c0e594bd468ed6934f294bfdf13ac3c2c905. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZTAT2506053.