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 0xca5bdb3d90f968491405293d46b05b5f0392d9644af331ce603ee02006839b86. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77b2c114-6df9-4902-afcb-5c1645c4879b.json and https://artists.proofprofile.net/proofs/artist/77b2c114-6df9-4902-afcb-5c1645c4879b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xddc436ef1335639780851ea3eac8e878f32cdb94cd92fcd32e58149afb924689. 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/DETO31900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be7fa5ccf6aa81d71b120ce15b60a76466c476ccde98b16c70d9dca04095717. 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/DEE861904288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa6b360f1a97f67f7ee8b642d82baa48b1181fe86f92b2f52e6b23a69252bcf. 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/DEBL31502671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66769437f16efaec4efbd5a675b358d8e4bf644847883084aebd02484c1e06e3. 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/DEN061902137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647a1ad72878deeeb9f26018b60af27e770165692fb80b5cd9285c8b7d24e9b7. 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/DETO31900094.
Ballermann 2020 - Die große Wohnzimmer Party
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50bfd10a4d505af6f1565a05531338188e098ce4be18a7bffba351cea428dcf. 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/DEMA61901230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071a20af34b9af5af41fb5e66281b07b4845cfc5326441578c602ba7dbe470eb. 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/DEZ381300052.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a3a68f7322be7f24eb58fdc1f39da3bf81321ecbf65706a8d7417ca7ddc1b3. 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/DEA812000311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfb86d968ac62666f933c47b70537c128158787e3aadfafaf67fdaca880aca2. 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/DEMA61901180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb0c1fbaad67e4bcec30155b48a218848b51df186d7bd8d713b610bdc08e154. 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/DEUM72004015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2da2669099c7b2fff1aa9d6693d485c249902c5c0308bf12560edaf0c361f2. 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/DEUM72001271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ae37f66bc20a04ff4d0e28d956d3d5f18e3c3aefb92d04ca961ac4e90e1992. 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/DEE862000912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee04ff7a1446b0276ab68fd23da369d4c5c09b6d49cc35ba9395c858889c686. 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/DEUM72006050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564391e1368c77d87209cf29d56ec52a8c8034b9a1c08b926dcda5b4a3f062c5. 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/DEA812000238.
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