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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 0xcaf2729f6c55717999554217df0ae62933a2587958b945af26a7f4cc2796d3f1. 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/5b3fb9d3-020f-4f10-b98b-79fc94499fae.json and https://artists.proofprofile.net/proofs/artist/5b3fb9d3-020f-4f10-b98b-79fc94499fae.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 0xe7e42799d2fa016f885cbe07fab1ff5d1b286370a9b6b81718f95484cf3d78ba. 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/CH7812530960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559c32c982926dc5aa94adda3701a9729327f8f8b334952a89b083113181c7b9. 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/CH7812423942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a64426e1f88af7e5eb2f8d83dbc6545f93b5d89a8e36ba912b6394aa5f68d0a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812420639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1d0177a8fe416fd8d87192259afab2e32ff314514b68d2bd71f1f6a92adbc7. 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/CH7812528299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be8a2b35ae28bcefcbc214a2d67a3d51b5eb19ee7a9e85c6d890e17d82e8c21. 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/CH7812425200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656ebcb6de33c346b2f02f101d61f397c473adbd5ccf2d2ad308fc70fc0e839e. 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/CH7812425408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0081c10947b02d557c31fa71d9af9bf8fb068b88d1141142acb027fef2cbbc. 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/CH7812425407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0738dd8eea56ea461857e87ff088cd54becd23465e81f0ed6cc926eecca337bb. 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/CH7812421316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1d0177a8fe416fd8d87192259afab2e32ff314514b68d2bd71f1f6a92adbc7. 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/CH7812528299.
Team Biggie VS. Team Accaoui (Part 1 von 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00696467e6802dd4d8084b21f6551d4968c98ea5c86bc06d5c0f6dc6c4589a3. 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/CH7812423476.
Team Biggie VS. Team Accaoui (Part 2 von 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac7de0959614592b79274460f1cdbed066245c3560f91b275fc7e426b2b140e. 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/CH7812423477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4c580efc4ef450b037f0ed0037bc7723267788f5d5dd85a454fe849063de3c. 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/CH7812532327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47c7465ee2da7b0cd89070041e4efbdaca8da18974e657556939658a0a2b17d. 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/CH7812531500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e42799d2fa016f885cbe07fab1ff5d1b286370a9b6b81718f95484cf3d78ba. 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/CH7812530960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21275f20920c7daa572ff94151ed031f23465223cabab8a366760c765e354a61. 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/CH7812534222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47c7465ee2da7b0cd89070041e4efbdaca8da18974e657556939658a0a2b17d. 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/CH7812531500.