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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6d12f83247d28e25074b77154d0ca9c4f7542b097a1a53b5a3395a20ce76d1. 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/8400bdea-6da7-456a-9bbf-896922d1069d.json and https://artists.proofprofile.net/proofs/artist/8400bdea-6da7-456a-9bbf-896922d1069d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a05c6c9b34282832ee8221f5a82dd02a43e033a7faabb87afa21ab4be16cbe. 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/FR59Y2011701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59399b273d50d24943eceffa86f3069bf334683207ba6b75262c0b11dbfd437. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FR59Y2011703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ecb081cf36d58a0e826741ffe34e342a2286b27f2a1b8f6e3ae6c8ec4f57fa. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/FR59Y2011704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1450b4295876c4291fe262a705542878bf8e52c7553a387f18412bebd1b34ba. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR59Y2011705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9857fab2be5e960cae5aec1188d9e8f8bd08a0a42987e8f1d3554a82d1f4b942. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR59Y2011706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6acf32cb9bb8d9e9ab0b3b356998f462af68f9c2da0253f2126f489a663a0ac. 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/FR59Y2011707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46925b086542202216ae8be3dd5952ccf941f08e4ac97490fbd0f3e553269b3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FR59Y2011708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c1f1b2d8b6a2f1045fb71d0eaad965be1bdf210f2a8deb1b2f2fce1001233e. 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/FR59Y2011709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2c288cdaae6957381c85c7dac8f297ccf5e0e734f0dc858a32a150c4eea061. 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/FR59Y2011710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577cca450d18e6c4b2de324bb4edbc270b0064deee17262c007e31dc7beaf22e. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/FR59Y2011711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27242b639d348068a86c4f6c2a5d3004f4599262a1be4b199950fc5783573f93. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR59Y2313101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf112c95a869817e6f642e04433167a2b59f6c6d8f1d41b937bb3c39251d45dca. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR59Y2313110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae41e5ae46780c35913e5aad1edcdf3ddf085c662fdba17f1550d006f81bd5f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR59Y2313111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f999f575116770e76b98a6d0f4eb0a908c745173ebe86c099c75cce71fc4760. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR59Y2313106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc6c9d34f1dacabb180373afba0c26c9970f5063b142fa61a4510a9f4fc233a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12218362.