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 0x770d7e097dbd8679a630a8536740dadcdf1a9070c7e45dfa228b3588035d8667. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/105d3e26-c870-4cde-804b-f1f631686a4a.json and https://artists.proofprofile.net/proofs/artist/105d3e26-c870-4cde-804b-f1f631686a4a.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 0x9c3b46766cc2444f4fdad0731fd29114bc5bb064b47218941317563f2c41d136. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITAD82200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a21c6df6a54b33cf6edd27aec1d34818ac093f844495510a8dd4b36c8bd7405. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITAD82200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a4b5e56bbd070d194317dc8e3a51ed7ff2e68ff58b8a7e3d80f1d288e43395. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITAD81900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168e82ef5e0635e55ea3977da946cf1375536a14f2f6ac50d5ec1266a3be3576. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITAD81800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaaac5d65262e21817890dc18d3d87cfb1941d573e896dedab810a852e1d5f9. 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/ITAD81800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168e82ef5e0635e55ea3977da946cf1375536a14f2f6ac50d5ec1266a3be3576. 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/ITAD81800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaaac5d65262e21817890dc18d3d87cfb1941d573e896dedab810a852e1d5f9. 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/ITAD81800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f68f701fb687ed0fe08aa6ee69d6de69d86e17d759b7f8d53b2f6f8f42ef11. 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/ITAD82000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a4b5e56bbd070d194317dc8e3a51ed7ff2e68ff58b8a7e3d80f1d288e43395. 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/ITAD81900011.
Deep House Lounge, Vol. 5 (Chill out Set)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f68f701fb687ed0fe08aa6ee69d6de69d86e17d759b7f8d53b2f6f8f42ef11. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITAD82000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3b46766cc2444f4fdad0731fd29114bc5bb064b47218941317563f2c41d136. 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/ITAD82200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a4b5e56bbd070d194317dc8e3a51ed7ff2e68ff58b8a7e3d80f1d288e43395. 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/ITAD81900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b36620b4f1ced79523f725ee6c554f4c8a6f93d0541ca36903142cc0d31279. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITAD82100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3b46766cc2444f4fdad0731fd29114bc5bb064b47218941317563f2c41d136. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITAD82200054.
House Relax, Vol. 11 (Summer Deep Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a4b5e56bbd070d194317dc8e3a51ed7ff2e68ff58b8a7e3d80f1d288e43395. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITAD81900011.
Deep House Vibes, Vol. 5 (Chillout Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb758ec853becf64ddadecc01438bb6cf9c2bbc9578cd3ba7773128ca479d64. 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/ITAD81900090.
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