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 0xc7dfdc3d6b336aa1057f84f86a374af5a107d80aa63a0f5b0702eddb4818e671. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a848869-45ed-4ccb-b01b-9f1f8a576d76.json and https://artists.proofprofile.net/proofs/artist/3a848869-45ed-4ccb-b01b-9f1f8a576d76.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 0xeea87aecb9ccd5e63f53e90fd80cfc8bfa9d77e052b063bdf564fce001820c8c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BE2GN2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb0f2402dbd64cac5e780d68f59348df93b36e52ae3b3de381024016a912c85. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BE2GN2200103.
Inci (vol II) – Treasures of the Ottoman Heritage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ce7b0c3e5d44b2010a3901f4ac7966143cbe5eb4c029401091c00c8e23a9c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BE2GN2200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b7c4186a76178a0b9ba17f6381a6ba8b829a798729ce276657dd54a4b23688. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BE2GN2200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faedd845b4fe1ae0886b438cfb75ad6875112130b92fd90ec06278fbfb0e7b6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BE2GN2200305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebb196eb8e4c74b936bbeef3ca0e736a6349432421b5853c859b860eb546ec9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BE2GN2200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4236fa8e32c0858d5739c4d57a608d1ef9292855e91a14c4de80f315746394e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BE2GN2200313.
Inci (vol I) - Sacred Music of the Dhikr Ceremony
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ca9304d572ce324dffa2b669593f402527498daca7a4ea3f9ce4811a9300e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BE2GN2100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293dee48074629057b09d0a9c6ccfd9d15df80aab2fe0190c97a4ae8f67f33ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA560543494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6112d05ee59ba6509639aef479942bf1663da03bd1a3ca03ee23a808caea929a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA560543495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125aaf09ec04e6ea841ef05f337c63170022cf599a5a27a419d82dc764643c5c. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USA560543496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560b7404bfa9557c6fd0f595490b53af00cfa683ffcf4773eb8eefd2485abe91. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA560543501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b63ed7b7d79c195914789027b921fc12f884514dd8172970b10e422ce017512. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA560543503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bf95a87601f98fb2df5cf173a118bb6a57c87a3eb131b2de77683b6be74734. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA560543507.