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 0xc865e03e4efb14bc8861559d739da300a341fa6ddfd0e984c243bdfabf565808. 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/deadc9c9-8b43-4416-ae85-2ea647bcda2f.json and https://artists.proofprofile.net/proofs/artist/deadc9c9-8b43-4416-ae85-2ea647bcda2f.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 0x30159e507fced074f3d9b25bcdc80ea7dc12ac1c6ea47f2bcf85a41cf58372c8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:32:41Z), 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/MXF019401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f665498d4aad2872a00ad43ae1f1e489e708acc5bfcd6eb749e6b06c33a595. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MXF171303538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06a911bda550ff1ff1ed0f32c1664d5a554700f47514a1b5089872e2b7241ac. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:39Z), 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/MXF171303540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d6e9ab3ca0cc678dfc06fbfbaa1cc5bc35910ead3c6a3b74897e3f506335cf. 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/MXF171303542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4020f4b174a45b1bc753b4cecc08c4a8751daf1644463f988a5f1c712432ce0a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:32:17Z), 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/MXF171303545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2575b614b6ea32ee27894310e7404b466a7b0025f5bab81608e83b613a7a87. 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/MXF171303546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0525c70977cc8d7fb8625c5e90541deb95df80b9dd6566fd25e1faf4eef491. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/MXF171303549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a07f1489b54b485dd648c519e8bceea1842e99fe25ad09fe56f797f07573d0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MXF158900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac75cb1d04f12ad7db8b3662c97c96150b563839d5a7db8891728caac39fe7. 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/MXF158700096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975c15986453f22a4f08ab40c3171824213ba0ec6102545302963def5d69d008. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/MXF158600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c059fc35badb27aae84f1fbb34a27ec3d29e19903b96f5de8c44a498a41230. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/MXF158600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633d844f1defd665e4a8aa37e6132db49e9e1d3a48883df9d28927ceb5a1512e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/MXF158500189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab96e5e6c7e319b6ce7878ab02f2f6bf3c34073ea429f28e71c7bcc816f0f1b. 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/MXF158500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bf65e465b6a49f95c713a2116ed096e101c699bff442c520aa6e4cdd251444. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/MXF171922395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffce5312339e270486b592b92276e7eb9cbd994494fff101d232dab143be762. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEH1913576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6705d791c999fa20257d9b8a27d8675736bc6a7142e37d720d2ad09e7e0e4f2b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:39Z), 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/TCAEW2039091.
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