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 0x322f52710761b76a3e2045c4c9958eca52c858c812d38c6c53e954add961f65b. 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/3aafdd38-c8e7-4623-8d69-0f3329f83053.json and https://artists.proofprofile.net/proofs/artist/3aafdd38-c8e7-4623-8d69-0f3329f83053.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 0x2f48746b652450716662fce61ab2532ce03c0e936d17d380b9a048cbc133a52f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX281932651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8153511f74701b0a8ccfc1469bb1de390839617f3538ae9aa916d82edaa66d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:23:01Z), 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/FRX282057517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8390416a455953f8f744f06068fee5e03640226eb43bfda9065890f32e99051a. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:49:52Z), 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/DGA062045502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3289b85f535dd8153ee33c3d9ea2bac8772330e5600362cfb7ae8282620f8f7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR2X42102011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebb04b98f2174688224f8cf38e5040fa4a4ddff9fb878fa71a0f8e998842c68. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FRX282120176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c3a6ffb8122bdd04337fbd9c9828fc6379f2a20b2c520ef5843e80aed2ac48. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRX452161111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7318dc71eb2d17ac2c6b270e09121cdfa25178f59c81071dada12246caa989. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRX762128202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8609b500482a78ca4dcd62026ad7943164304524970322535de88c771a52ae1. 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/FRX872135215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ae5e97caba7e42778c11541ae026c7cdf239dea8ea55dfb597733b934fcee6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:09:25Z), 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/FRX872328751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ce9ecdafbc8d873e560b4409ed74d6d18b77c4b5d6088b35e0cb488bd3e394. 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/FRX872348594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b3cd405f4ff8df474cd25b2e14ef3ebb2a4413e592f1e5d3bb0a7bbaf30ead. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DGA072387544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e8a76a8ddd32c2badf99f7c065526001568e4f0e40eabb4155305bd68b0d6c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA092355071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fb81e64be494699722f7531e9d6f23eee3134d2b4b4d88cb157dfe9f169a93. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/DGA082357363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ea350191a3edc7232ce5d5d91b635682a3db4197d2da9f5d149fe8e0fc7835. 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/DGA0P2311096.