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 0x1286142d484942a557058b676d475a2e57568220ac08c94dae1475f0b4cccf49. 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/8d0141cd-df52-4d39-a6b4-480e2b5ea7f2.json and https://artists.proofprofile.net/proofs/artist/8d0141cd-df52-4d39-a6b4-480e2b5ea7f2.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 0xeb6d4d033277cce43a4e210811ccc494cbf0086952b0dd87d5b9c3ab75f7cfdd. 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/TR0380605293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f5ccde97f567ce605f683e333e7363bf735c77ea7a748c857bed5bc43ae67f. 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/TR0380605294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd787bbf5bae4c118015747846ab5430e85bdd1a6d34eb7bc824b150243be25b1. 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/TR0380605295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfd458521d82a1bb35f9318100b861ef20f9522b1d65414091167f686596eca. 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/TR0380605306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33f06eeb80398e34655dda455310cf84c9af7695254f5f035c600e671daff2e. 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/TR0330604772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf996470682a8ca7e0b15083c47f5d5390052a60b5c7be735ee329d37ea4e97a5. 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/TR0330604799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f87cd7334f400e666a6dd3f01497995045ddd8dd76f0d74c3e828e6af931382. 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/TR0330604797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe80dbabbfbad07893b4d220f0f20e2bc4d4b397cfa6f7933a40084c37ba21c. 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/TR0330604796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bba4909a5752fd8e2dbf204071bf1f1ffa5fe2004e85bfba508b3498204b5e. 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/TR0330604794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814e75fa825073f5e2016439fa50bf6fd6e843a5700e34d7e4fa3e6e8f9bd9f5. 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/TR0330604801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5231678967c56ea97b0af8621161aed08e16b905e936222e563dddc31992e4ed. 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/TR0330604790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311c58a9cdf97ad58ed7d5d29d47ce2c4b5f86cc403dda8aff584128f2d7e50b. 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/TR0330604789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1723dc52760bce7285a0ac482877d1b3a46a9a496215fda5c0b84f9ad318dbd6. 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/TR0330604788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a76c49a292182eea2fb1e78d985db954d0c7fc0f9db66c5d94b690eef19c7a. 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/TR0330604773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931ba3890b9522ed0c47b65643cc1839ac831befb42c3a28e02d491f31194edb. 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/TR0330604776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fbb757bd50995830af617e7edfe92f7a916ed6e31a74e36fba98a107e62974. 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/TR0330604778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57d34658c814e9e84a40a6f16d6431ddc70ca3acce64ae3ee64214b9f88d955. 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/TR0330604779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2d21fbdb1a9b98d4717cf53780ce378ea4a2c80d32559d3491790d74806c0b. 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/TR1590600190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3f81e2de694a96f967ad846a3762ad0d73237af8b77ed9c6ce34170197ea05. 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/TR1590600181.
Tepsi Tepsi Fındık / Anadolu Oyun Havası (Ali Ekber Çiçek ve Arkadaşları)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa203341945a8250ed8bfcdb39e6b58f483e9fb859eb5cc7cdc00748a561657b1. 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/FR10S1998267.