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 0xf1dbd4b1a59308de70cee3fb5bfce0beb635aac4abf3b47e4f25db7ba120a3a6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64547fa5-598e-4a5c-a378-6356a6b39c77.json and https://artists.proofprofile.net/proofs/artist/64547fa5-598e-4a5c-a378-6356a6b39c77.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 0xe1fe7b68e280996e74eb45818384504b8f7a3a08fd997a775490d17c1ee3e6d6. 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/CAQC61400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7325ba19862d7356b4ae9120f56a3aaccaea31a1bd8411b8e4cdc50dd0d824eb. 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/CAQC61400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c24c824d9820671e7b9f0c36093cca9a7bca4772fe994b68181a6b368905b05. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CAQC61400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468f5d038cd3b87b80968c40c55cacdf962dc35eec6d94df200af7586e29afeb. 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/CAQC61400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c946cb5460baa2da540de7fc0f505eadae4b53de877aa1df13d490e80182c2e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAQC61400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0e4c296890c915248c6662bcc3e963515ee41de313944e8d9e8b37f3cd83c6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CAQC61400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0b69a46417875a2729c77ef584e12e94a7ebd6a037a0974c98e4ad7d945534. 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/CAT221210001.
Air a' Ghille Tha Mo Rùn (It is the Lad that I Love)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9690678feeef9e31320914d4f09c14c387f751f6624b0ddd7d8056918f5ba1a4. 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/CAT221210002.
Òran an t- Saighdear (The Soldier's Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567db94a8f8bdc7a3649dd6510b6e98ed788d88eaf1417c9817123469f4e4d5f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CAT221210003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd148081d754fadc830faa7f0b02e724ddff519cd36998396adf604b11d2a6ffd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAT221210004.
Rinn Mi Corr is Naoi Mile (I Travelled more than Nine Miles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4e566f52ab6b238b426ee307b2b57fc2c4ce536fbb9fc3d41be0708cf2024f. 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/CAT221210005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aa93b4bb9079988966e2ca84e63629adeda0bce06979f4702a83f9c39abd69. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAT221210006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab34ec3dfc791168123933a2eb10ece7911421d5af24ab117b6dfb0077aa756f. 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/CAT221210007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eff249369c2d7aae78aa39a29f5f72d67ffb2101920f7bcde68d07d564e8f9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CAT221210008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc33bedd705b54704c940adbe87de5e6e56ea1241cdab5cf810072b638e473dc. 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/CAT221210009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f8af1ffdc2c5dcf3330d59aa32ff1afdfed627d635a264adf7461318149ee5. 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/CAT221210010.
Taladh na Beinne Guirme (The Blue Mountain's Lullaby)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf154f8c587bdac2958f1bec55fd27786f76504f30b4122d676049b40ec18e977. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CAT221210011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61af18b2040538c1f43e49b3645d97e141522e7b9dd2022e3011cc841706c42e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USFVZ0700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36832ee2d58eace9f6ea3996667249465f57c9b08dc979628be99d6e2a2f4f04. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USFVZ0700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5849c7fc484cd3467a56440a3ecb51aa4eb6c33d729b5f0a157935bfb8b0b5bc. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USFVZ0700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bed593af81e58260ea1d3dc81a83f3c5a12fe71c09146db488062afae6db81b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USFVZ0700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c65d0557bb4bf75dd5e24e60bedfa585e11f09b8e378e7a1702d5ef283a0d93. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USFVZ0700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1318bfbb770c0523ea02a2ea82c4913ffb42b8604e53e28b41e69496dd9b28. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USFVZ0700021.