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 0x9539e19f1c01bc5479196920e035f95876e71fe398aacb5dd24911859d265c89. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8bca87f-c426-474a-8e6a-17a81bcaefb5.json and https://artists.proofprofile.net/proofs/artist/a8bca87f-c426-474a-8e6a-17a81bcaefb5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Instrumentaal jazz - Koffietijd, pianobar, chillout-lounge, ontspannende achtergrondmuziek, diner, cocktail, hotellobby, saxofoon
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 0xaa7432f274b3f62452ed093ba6579b15b865797851e684780571eb558648feef. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PL0652100361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac78008987ab4ca4c266291e1982c14b1f7683b18976e23d69e8d3f82250cb2b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:20Z), 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/PL0652100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc6d87006e0cd2a303f27f96c66c09af85c0aa1b7970cd228d242c4969154df. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PL0652100363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f122c1f870ad4653662ac16030c632c425bd2a1a530d0df0382c73af275f561. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PL0652100364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2864156f852b0979d793488581164884d34ff74491e6f6d1101e1cc20d3f38c4. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/PL0652100365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7839003a17ff1bee670095cc6e693e605bd29295f4a2ffba533abaf2b073380. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:21:04Z), 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/PL0652100366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d0b42e84966311d7b2b12071446f14cfdacd1db8f0c46432752a632ef68dfd. 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/PL0652100367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736db369091b0a95b9ddfca19927fe40beda2a03e8b664a9bbc2acb25d16ddcd. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/PL0652100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285dca54e62423fc6ca1acbdf5b2a371d469c65fb5dea9055589f9b360461296. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PL0652100371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e929f85f90877f37d0390005cb168d2eb3386b6e8b83614487464f68671f76. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PL0652100372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dec1af2d030f7acafb1bd62baa137058d6b7fa57b6a043ff240c4c3007d58d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:07:27Z), 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/PL0652100373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0149459630eb31f6de7b0a45325473ef1f7e71f5ce52e603aaf7c8f01691a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:00:07Z), 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/PL0652100375.