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 0xfbf51ebab412431bdf66856f67a5986d84ba3dc2b2a95f452578e512042a1b87. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9ff1df1-c8a8-4d6e-af55-2c50ec095e4b.json and https://artists.proofprofile.net/proofs/artist/b9ff1df1-c8a8-4d6e-af55-2c50ec095e4b.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 0x0d532754fbd0c58ca4f938c9bb40adb313284730ab0d5a148579c4d9cce086d4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:44Z), 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/QZWFM2560173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33ad651ed445414d3d0dcd85c3f50ecdc249b6559af81f2e84a7b4b0116167c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFM2560175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735034b916eee07501f888ede04fc277b7ce551a7670a4399905e625a8709bf8. 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/QZWFM2560177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb742ca1ae0f44b5e058aa823cbd994224c7ee8c4298a187ba9e5079db339eb6e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFM2560178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f9c21a2a57490b98cb98929e79eca613178b9bcd1e31205717aba6c9cde762. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFM2560181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdd264cdbc7a34c6dd3577feb7d799119c95d416ceee372079d7ca7d383f2bb. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:36:00Z), 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/QZWFM2560182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a2b7efdc5936b4fcedb05ae0a45855ae92cfcc5f683150d9da242a1232a146. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:35:14Z), 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/QZWFM2560183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fad7f32fda1bcd21fcf87995e7e7bd5a92464cca429a7c38538d02ed41734d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFM2560184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75489b9cd15a87e217d05b21ed91c3a78def65b54c5964e2fa051a0c5b99044b. 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/QZWFM2560188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03c9ef3f24e7c1cb302ded654066d345527a581c0f6e4188ae541fe2df0ce91. 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/QZWFM2560189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6e3c2578baffbc4fbbbaf75d5b9a9b9251f3c6c906738c27a797e6ce793a9c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:48:59Z), 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/QZWFM2560190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f33c99237b8a18f1490c0611d316d5e9816df9aa2e1b1336552932982a365f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFM2560191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231fc2262b65ee2e51ef83e415bfd4ceed6c954c626d45cdb384b3f6efc8af98. 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/QZWFM2560192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e457602e85d9ebf7fc2acc1ec12620ef224c3a8ce46e0bf1371ede2be4c481. 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/QZWFM2560193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6ef691d1ba1eef6aab205ff5f31cee8b188d08ccaea11cfe35b486379fa921. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFM2560194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aa3045b201051ba70fcd68bc72d024a927e8946f3b9449617618dfe30f95c1. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:19:21Z), 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/QZWFM2560196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2431e8fe8eefc70e0425ef7c41aefd28bcaf02010611658522ce1242bd19fc18. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:40Z), 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/QZWFM2560197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8a9f258c5b889ab991c1f0cf711cee4b066a212abc3dda6cf7296b8c1eb476. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:17:42Z), 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/QZWFM2560198.