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 0x83bba5b558b113e95d5824b6326d024f0327483ad2c62770b875361432f96e7f. 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/b3c39458-86b9-4573-98de-2f6ffb6aff2d.json and https://artists.proofprofile.net/proofs/artist/b3c39458-86b9-4573-98de-2f6ffb6aff2d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Armenie - Haïg Sarikouyoumdjian, l'art du duduk
Plainte de l’Exil / Duduk improvisation (Arménie)
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 0xe40a0668598c6d98eef73ece3b66ababc7a0e47d6c912255da3c79636893f017. 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/QMDA71379946.
Dök Zülfünü meyoana gel / Tanburi Mustafa Çavuş (Ottoman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102dee3a0652d435a168a9495843e18d8f396d9ac500a2a0b301cb0217c364f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMDA71379925.
Chanson & Danse arménienne (XIIIe siècle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d1aee021345b1225e1907046bb01fe7c19536b953d6189b6b45ff603ffa4ba. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH4211700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01126d2fc5a5fec1383d625c90ab5f5fc263749088a87e8c5898738912c1cf8. 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/QM4TX1604910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048a4836fe6c33c16b32c6b2e26c91a6afa7aa567cae6682b44f6de2b5310256. 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/QM4TX1604914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1025b6e05daa2294bc86fcb0bc56a5a60f6fb105ec3b157b11d9fc6ec707fdae. 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/USA561347835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3f8da0b4542a677d12199484c415607a06f53ec05403a65992a2f851dbbdb0. 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/USA561347836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddf9c891cbce31802755774a58a353a0a61add44723ea0710ab9b802d2ee942. 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/USA561347837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021f2dbf5ea31422d473f93b0ad7f3a69d3feaa201d2cdac2ebfd4ee2cd6ce63. 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/USA561347838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d619ec34c5faed43394225d9cefb844b90711b46f17dc2236af2dbefabcb1f0. 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/USA561347839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc6e550425f756f074a360668ffa32e798ac17a6ce6765d21e48d7123a32634. 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/USA561347840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018d9e0958ce55d7c386dfe12e4c35f48b70a4323c444c4060c8c2e9ffc2173d. 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/USA561347842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c984c040b910884105c704432b688254b12eaf372a15cf05281757c2919fc4f. 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/USA561347843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5d8aa0d919ab0faf5e89e3ff78aba414f639546ca5d22db6cf9969f6d06aa9. 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/USA561347844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23305cdd03d8c7168bc01702f138b5dfa2f81b168bc8c323452ebbeb3956e908. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA561347845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b23375c63bdb1afdb365b3f2f7be0dae8b8dc70fab043754b93b63f9f601f1a. 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/USA561347847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438dd376b0402f5348f4d0387c5e919a2154bfda5649a192fe12460d7e5610e0. 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/USA561347848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc89ae3431d7ba6c7ae06dbb006e16a822b2a9c060e5a0566183877c51aadce. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QMDA71379935.
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 0xf6161d9f303408c75f533e6307c9f95445a2b180a0b7f3f06ec648dabf5aa012. 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/CH4211800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e10c1a5fa80acd6d9e3f6b8c3a0e3a871b749f96be5a52b32fc88fa794bfdd9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA561395092.