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 0x978ab45c728a369c4cacb6bbe74fdf266b353d6cb58a4782cf970746179b9d9b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fa43a47-9874-4c1e-abf5-81e2d5746682.json and https://artists.proofprofile.net/proofs/artist/8fa43a47-9874-4c1e-abf5-81e2d5746682.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bridge Over Troubled Water (From The Voice Of Holland 7)
Bridge Over Troubled Water - From The Voice Of Holland 7
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 0xd07034d955522f55a718ecd9d4211d03df86c6aae171cd937f40bc46480cb2f4. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/NLZ291700008.
I Won't Give Up (From The Voice Of Holland 7)
Blow Me Away (From The voice of Holland 7)
When I Get You Alone (From The voice of Holland 7)
All My Life - From The Voice Of Holland 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72a55a6f6fc2a4395371d6831057e46c856f946eafff3f28bb325de768f8110. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLZ291700114.
Another Day (From The Voice Of Holland 7)
All My Life (From The Voice Of Holland 7)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54be9eb87a59d4c1cfed66cc646844a1cb4165eb90c64ddd0144a2458d9ddc28. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:05:17Z), 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/NLV6L1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec12407fb2211e45abd7cdcd8935d626dbe1c180e7faf3129b99696ad01fc33. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:24:36Z), 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/NLA802000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8f0e3c0cd5352289e2458a17f07cf35e6c9b6d6ae92dac71bf367a64526bb5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:28:06Z), 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/NLA802000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffc7a8c2a13f0659fd0f115207706bd864a34031544fde1b37f2bd17a91e969. 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/NLG662100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f54719996320ba1813b6a0b0cd72588e6782cda21cb0ccb64810a078a2f4044. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM4TX1949299.
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