thumb|Jesus in Limbo by Domenico Beccafumi The unofficial term Limbo (, referring to the edge of Hell) is the afterlife condition, in medieval Catholic theology, of those who die in original sin wit
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 0x855500adfd41ac52172e80c8f7d2a4223394e4678c6ac643d2c3617781c88b4b. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e3a9539-01e4-446d-96ab-cd16ad7d4fce.json and https://artists.proofprofile.net/proofs/artist/9e3a9539-01e4-446d-96ab-cd16ad7d4fce.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 0x86c228486f6c0ecbb06650c10b3fc1fcc4ad77cada36bc4cc7d4ddd2b2ed98c5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/SE5BU2505960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed2623bb7ae84660fcfc88a8ccd8c170a4c9d62cce2f4a4d660fa05b9818482. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SE5BU2573781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155ce346a673a8a2dc83c6022b42473a5042d0144870da76b7f5090ee68e5e84. 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/SE6SA2440153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff63a286837082cc1b0fc225d55377cbd5157fbea85cbc5b31976dd71b8cb2af. 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/SE6QE2481870.
A Thousand Windows - 2025 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455c7395180bb81a24e481225f1b878417f503675a4a1d849df2f9133b0863a8. 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/SE6XY2525731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed2623bb7ae84660fcfc88a8ccd8c170a4c9d62cce2f4a4d660fa05b9818482. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SE5BU2573781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c228486f6c0ecbb06650c10b3fc1fcc4ad77cada36bc4cc7d4ddd2b2ed98c5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/SE5BU2505960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be7ebf5ab70585bd3d92f0ecc572406930b43c41d04939b9bfe34f0784a2822. 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/SE6XY2525732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445c39f3f8626364332e05a642a3da5ceddcefc13cedb45fcc168a2af34d0e67. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/SE6XY2525733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8356a7c745c20d448f673812cf34e4f13dd0196869426213ff11674597e499. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/SE6XY2525735.