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 0x7bd3a6d0339f718f2942c70566df9d8a5c3255e170e4a1a78b63c14ed23bb476. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7f109d0-0a13-4393-a30d-a68d0e5a8ae0.json and https://artists.proofprofile.net/proofs/artist/f7f109d0-0a13-4393-a30d-a68d0e5a8ae0.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 0xa8db0a2f43620781d949d61792605d6f8f88870fc3cf0aed3ef5e6c78f7d0234. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA082200441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d90b15c1ffa5e4f25b4e79df597887d40676056d3794e3eda23fa091da7437. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ESA082200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ac094fd6c5731b8873976bdbb9f10e853636bfe00ee7ae0549ce1736bfbd9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA082200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13b3e1dca7e899a329ee46a3cbf3b893d08df07edfb23dbe9bf9366f9d5cd24. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ESA082200444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90886ed07f22fb861b3e93e5ddff1dcd7ee928027f15605cb0aaeca11180605. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA082200445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259605fdefb17b146f297a43f1e4c2a4d38da9f1579068b3053f8bfc8395389b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA082200446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21d3705952fea9f90ca41471be8a0614c69b6a0a7938e0fc75e228511a10307. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA082200447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91265d7c40f597cec4c5f42568a195f627d6e18ffb3e0bdd41066539d527aae6. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/ESA082200448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5fa3d7386aa8014ac86419ed8287ae86ea77755bf544f131f4eec9eb252179. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA082200449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30a89713b09940fe7679279ef9eb0e4e1c1ac441d40940bbe65620974ddcddd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA082200450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f4bb61a6e214762f2689f8d85d7f064cd9a502c48fb70e45449ba4de97febf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA082200451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192ddca14c211acec47e0f3b3f0c54b0c93367de5506868878018a45cf82de02. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ESA082200452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2c4a8664c12c792cea0b5773b9619ae660ee93e05947ce323c751c6cb2a1f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA082200453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2365e21a976c5616c2583fd9c054274dafe1e40a9038c0707a1275f7b3c13fed. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USCGH2560285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46caeadc5915ed66631046184499c60c983887b3e31bff4f326c43772412ef22. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USCGH2560286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7059500b3d7226811921af00f27b095b50923f68d5d856e2a2046263409eeb. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USCGH2560287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2d1d1a398202a32d062690f623bf2b26ccb2f0627602d73fcffc57703857cc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USCGH2560288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec8fa7810acde018acb321e716d068e93b7e916e3b1d597fbf376017de7a7d0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH2560289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0038584438af7face2f26b883541c45e5f068d781dacfaae891edf072b67bfd0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH2560290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd2bf48c6d37b4767b3253438338208d0e37798a468635ecb095cd23d2d8063. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH2560291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe793319a581c41e14b0e75b5ef6e77de3018a5c497164ae377546b10dce291ee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGH2560292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08cc7dcb392fa1250aa53cc3fd171feb33cb9e7c0ce2692ef4b0791061fafc7. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USCGH2560293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5c1139781adec456ec658edf8c44113cff730bb500d9644819d0f01a90c9ca. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/USCGH2560294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6386099deb9b5a4a9b8ed8585019ae63d0ff58470adeb93342f541aa9028a881. 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/USCGH2560295.