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 0x3748890115a700c9ce6f596fc8855727f74083c2988d287a5d362540ae8dfda5. 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/642671b7-f228-456d-9353-104e710725a6.json and https://artists.proofprofile.net/proofs/artist/642671b7-f228-456d-9353-104e710725a6.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 0xa4acf1845623f3ccbe76d6d73b99bc866848fb0ad7ab7aa0680e537f92fc1ab6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4RG2306923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b4078ae9dd2df31127656081834c7d42c8fd06d8aa47982e7a63477f956dfb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4RG2303647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f479a929fad3e08c68cc5b131b1ee8c76d7248011f2ee56ad5f839d2b0c018d. 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/SE4RG2303646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0475e74179b53ea7809509b18a0dee82afe76c128e441c0f6a250e33848a672. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE4RG2301943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36922236cc9a4ed2d0480e18238b13b800734fca2f686af1241ccab358b5d46. 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/SE6RB2206472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a01210d448edda9dec66efc2242626d2e5f40c44233f4ff6c261cc0b19dc59e. 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/SE6RB2204476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a4164418a9b2e17afd48d4437b458275d8d97a0a7a364cab4c2afcb851ae67. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE6ZX2170901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95bdcec061b0c67c91a51430fbe337919cb8bd28036c53e39e4a14d8a07e80e. 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/SE6X32148101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5767a774f2a7b62b4dce4c2a4527bc5dfb29e770e968f4a73e1ebeb5b33b45f3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SE6RB2197201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1897d2784b36bb68f0f8486868be8b12e7833254711926b58ee20f19b778e1f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6RB2171901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d58e273bb54b0c4243b047f19e58fc5096e8356b68e3244ace7bd6a824f57cc. 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/SE6RB2127101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e81c4a448c964d964f250836384f9f2d9510ea2bf57d9855bcd4a05b46076e. 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/SE6RB2127102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a11301b802029b20ea036090f51a4bd38cf2722e741b86cb24ebc18c13f9ae. 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/SE6RB2127103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c428a6695656c26e0bf27c22e41d4ff626a8672d6333bbcb4172a6123f8d34. 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/SE4RG2157401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f85e6a33f98bf1d829f1bac825e89e31a8e5480abbdd98ed2a36190f2635d5. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/SE4RG2157402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4015bdea2bbf9bbeb9df2ada9d18356edf9fe42a5e8b9fbfe10028ab7db694. 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/SE4RG2157404.
A Night in Topeka / Romantic Flute and Piano Jazz for a Quiet Evening In
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb043c51b591219e979a9ee6958f959ed03cd6d0ad8885e410c2a1081a5de3e0f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US4R30718372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531285dc3eb8b956924eae553e64d219a1025b304d7e00531ff5dcaa54be9404. 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/QM4TX1500605.