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 0x0bd70083b99bb020123585f2dec58a85370b815a39ba1b193199d646a945008d. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a54d7b0e-183b-4b60-8533-59f8bfc2893b.json and https://artists.proofprofile.net/proofs/artist/a54d7b0e-183b-4b60-8533-59f8bfc2893b.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 0x2617945bcbf2841825b17260e1c2248a40f7da323516861ad0ddf4770884c772. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US39K1634401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2baa88e8417aff58e1d433be67de5a54e234c874ba2b9b1fc6cbf6829420bd4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US39K1634402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ae903efb14466d267aa30fbdc920db45f6bb4db458c5e4fd265980d1c7219. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:37:19Z), 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/US39K1634408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbc006d937142b17747ed383750c97e96f3d14d85e4bca08daf2ce9ec442fd5. 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/US39K1634301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fcbd2523866263c069b02266dd95cbf4d8a6d9c0419fee1eb9c8dc00d03be1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US39K1634304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf78c5cae221a533ef08e596ba9325e0550058393bdcd49866c8b73a65e7b46. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/US39K1634307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bdbfca12b58da744016cddcb621ffb588d0f1fd07c0bcf8021914cab553942. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/US39K1634308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199c474b380a76e7a19bcb91dcc9b515fce963fa84de1a3e1669a943e234c29e. 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/US39K1634502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732d622822b62bb608681f2dbfdba4e6c20c0cf7a8cd4f9253fc04a68e077a76. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/USDHM1916372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76bdec77af1b87124a4d1668482b5574d18a3553bf029b94dc1432cc367bbef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USDHM1916373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d314b9fb964817488a0031c2e9813201a65eefd78699ebb3c2665a292ebe61. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USDHM1916375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d966bce285739021f8fc7d796017b2ead38be3241251f1518fa9beb5c18c11f. 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/USDHM1916376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068aba08921de41c0ef4a02cc4743c58234c95ed0b996130f2bc133eeb139eb2. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USDHM1916385.