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 0xd1d41deca4d6a2ddf8e5fc533c34243477743364e3c83798e375d0d144d4d376. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff00a074-1943-4709-b447-2c08405974ca.json and https://artists.proofprofile.net/proofs/artist/ff00a074-1943-4709-b447-2c08405974ca.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 0x58476e13ecadc675f191ebe4d76ca766638d96a0f7f8a1ffb113397e22329302. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:48Z), 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/GX4R52577993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972cfc068366b2fef77e715697c092130e80451623a7275d1a742c717256c176. 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/GX3HH2531393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a29962f239c3305bb9fa3b65f8738194096d0dfba5054f2830064deac8005b. 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/GX3HH2597894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe3bcf5558bfac95758bfd4c66b4538b39f9a0abb4100ef63905c2897c75b37. 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/GX3HH2539231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1029e49da31d6e84ef73822146d0b3c4a6ae4fa0e0f3d110fe5fea7dcba325f0. 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/GX3HH2522533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7537da0c64941cc7754a0ef5f660716597c389ad73c2464220cbef8f306ded1d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX3HH2594317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0b29324b98a222c9e73da6b59d52f275292bf6dc44b1c85967d34de3844f48. 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/GX3HH2541643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446588ceba1ac2477baeb46408ec069be20dbbc52b826738eddf2398a131fe69. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX3HH2551778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb857aae6dec1db8474713597e3c179c5980a28b6b12bace77295cb49cfd820f9. 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/GX3HH2544060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e30db7234a3eb0366c978f2e95576826b7b0acc014fc752a4c713b44dfd36cc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX3HH2535327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782acb545890dc278b6f993916fd3772e367e81ee9f23917f605d59b02cf863. 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/GX3HH2514048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfdd1b1a82d9d379600296d88c20da9f27b8e2935ec0be35cba0ec0f9cbe71d. 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/GX3HH2590041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8562a4002bd8d4d2e38c040500469019875a0fe0cc20fd7c1e6b7e261d44fba. 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/GX3HH2559152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26096b8b338ef7d771a09dea60c3ceb064c0b05310d079f646b20788327e240d. 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/GX3HH2508566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2c7bd850e1bc8f03a0932f9a81997128fc284a5b53cc4c0d897eac21d5f5c5. 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/GXBDS2557824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2c19675c8214b75abbb062a856eab0135dc917526bb7db94cbbd9583ee8d20. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GXBDS2513430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3002402a336b4d495956d5c14079784918d827d24a41a885dbae77faa6f7a22. 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/GXBDS2534695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba4561e54209cfe6ea07be544385a10b85f505e87f2ab5dd819e7913b2a1e80. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GXBDS2551710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc838bdb208df0c29c0f5b46f34b2363f36831495c693eb1b72aad05d062ab9ff. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXBDS2554237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fcd057b18b2a82e33682f3ec5ba5df54aebed563e81f17006f38e9b255d667. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXBDS2516539.
Dear Anthony - A Story of a Semester: The Beginning