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 0x0c4dd09e71bb25b7e62e33318a023fa074e2c518a0d7e719ca5c6efd88f63859. 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/12e54616-ee8e-4f68-8322-3b7c2ee63b7a.json and https://artists.proofprofile.net/proofs/artist/12e54616-ee8e-4f68-8322-3b7c2ee63b7a.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 0xa3908ef9c6e43981165f33ec36bfbaf98f0012290fdfb551ba0b88326ac224f8. 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/DEZC62363684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6de0d76009b9f1a0906e7257cd952cdbc2a7b857407ed8233d44b25cfcd158. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEZC62368137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a345eb25f651ba095ca36a7016f61ece00f8a0ea6e14cfcc06d30ad01d2948. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEZC62368138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967523944645e5261712d3109e0bc3be77f7e9f0b1198b6cd60837c4ebf10699. 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/DEZC62356507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8313ce345d1be81fd77875f77ae69f25cf97a292e594b1d983a9f0950b76fea6. 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/DEZC62368139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3908ef9c6e43981165f33ec36bfbaf98f0012290fdfb551ba0b88326ac224f8. 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/DEZC62363684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967523944645e5261712d3109e0bc3be77f7e9f0b1198b6cd60837c4ebf10699. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEZC62356507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18881b864d27882dc66cfd496f33e481cd9c047e321c74b64c62464b9b2ec61e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEZC62276220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f95e9d97c4235823384e4019628ab1add337fecb30ed008b01a6ae6003c272. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62252478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4162059c5bb159674291a43893485f48c1a3eaa7cd54250d4fa51fe9cf1bb2bb. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/DEZC62252477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a99a2760432e32bfb212acae5e24c94a8caf35c46ce5ab25b97507d85fbd96. 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/DEZC62105789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc6392bc59aab729cc435b842037ceec23f0b1b7f5aea0860613a1e4c603254. 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/DEZC62193368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91504f51074269e61eb1735f8fa02b1ef055a023809dc50b8e27f201ed9bd1e. 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/DEZC62136498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f95e9d97c4235823384e4019628ab1add337fecb30ed008b01a6ae6003c272. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEZC62252478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2705719d09435ef5207b70dfb54996671055283e1814cea7f62666167d0183. 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/DEZC62124077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d767c9eec547712a2244f18c46bb16b5d54edc3f6657a96f61daa715031dc8d. 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/DEZC62252479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91504f51074269e61eb1735f8fa02b1ef055a023809dc50b8e27f201ed9bd1e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEZC62136498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2705719d09435ef5207b70dfb54996671055283e1814cea7f62666167d0183. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62124077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a99a2760432e32bfb212acae5e24c94a8caf35c46ce5ab25b97507d85fbd96. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZC62105789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc6392bc59aab729cc435b842037ceec23f0b1b7f5aea0860613a1e4c603254. 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/DEZC62193368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde5975fc0d39832b174fafeb78653bab2254fbaaa54a35938a00559b721ec1f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEC162105435.