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 0x05839015ef884d371b97a554d3f7446900850d5141a0c2614f03ed6b7d3d16fd. 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/a24b82ed-530e-4e40-8042-b81717545b7a.json and https://artists.proofprofile.net/proofs/artist/a24b82ed-530e-4e40-8042-b81717545b7a.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 0xfd8b7de3fb9202956607bc2cd208ccb8917bf69d5acac02c79eeaa94ed0ecdac. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR0941700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171a7a3aa148673679015a5f5d7686e7edad48b1bedc302daa85f3caf15743bd. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TR5650700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2d46bf44c5042e7eb23b6ef4602eff1a27948c83c4e537c83caf6dd5f31673. 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/TR5650700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779a26c7d89261b3602c47cbbdd296feaa2971d273feadf16fa2b73b9e4a5725. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TR0530902274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505eafbd97b691cbd1a7610a7bda257baa1efb6428bad427e3759dff3287028a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TR0531102519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ffbcba545cdb20329796db5455677dc0f23b800354e5c9e07a5c5c6af11f5c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR0531102526.
Yalancı Don Kişot (Can Tertip Film Müziği)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e62cdf98d4a4e9f94ebf055e521e9aef99bac4aa9968b96547abf5f36680a00. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TR0221900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c47d15c066ec2cee9edada0604be5fabd595e0377c58680e8a88f7edca5127a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR0531913175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bcceb78be90af5abac16a8e8e4258aa731709615a09e400a75fd43046dd327. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:09:14Z), 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/TR0012300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8b7de3fb9202956607bc2cd208ccb8917bf69d5acac02c79eeaa94ed0ecdac. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:57:33Z), 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/TR0941700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43ed8e1c6e4ca3072d5499c0ed06bd1870ecd8c6e73ffc1c760d839f358085d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TRCDJ2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9756a5e987182fee28b56aef838c5bc3727503754da8194a3a236321fc01d4ed. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:43Z), 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/FR96X2599550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd5aac19d9e1c515adfa0a1c3cbc7d695011dc2fd0b98b0d5bd3b1f54b1daef. 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/TRCDJ2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4784141c41d26ceb447d864627d8147f9e8f0a0c54e6b3f078eddbe1969e6e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TRCDJ2400016.
Kimler Geldi Kimler Geçti, Vol. 1 (Fikret Şeneş Şarkıları)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec4501fe784549929c7b12caa0788e42cf6641df40005956595ddd0df0270f3. 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/TRAZK1900047.