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 0xb46c628bde35802afaef78ddcadc3f5c6b690a5b19343387c24735bc55b3b065. 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/a57c9aaa-8eb3-4c36-9b35-efd783c86d29.json and https://artists.proofprofile.net/proofs/artist/a57c9aaa-8eb3-4c36-9b35-efd783c86d29.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 0xf6b96300a74eb1a12b000b10dcae519a7a8a91b4205483701fc3aa11d800e227. 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/ITY101332001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e6c075ec17eb33d281dc31987476f5e70fa3ea41ce3d46ac5d410ca2dde323. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/ITY101537001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104a1242278c184f60de9d8ef29d5f4974ba86bd3810462885e371a8285b5f09. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ITY101537002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd038ac1335f74a617d6c7e4a9aa4e45890b3e7fc0e0b5e21abcdae63dd016acb. 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/ITY101537004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a28465804b8209af12af25bb423413155d53812be808fd383d5983159a8eb7. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/ITY101537005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd112bf220e1c52e52e0df34b9bfe985019d66fd7fd849bb1a6531eeee93c08f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ITY101537009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2cedbe7acd79bc389a91ebabe36083d8e6e16293d3e05c2bd3ef5c5d4f2de1. 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/JPH101700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b09de336ebbb63d4f9b9a99e75c72883a7353b7dc9ea4f86e4257dd24d71ec. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/JPVI01901755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891efb24e086f0818516a2b70df6bdc6a6fc20c23115bff3c3ca4a4d53b2802f. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/JPVI01901758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc508f070f65b5f5ae577071ce1340253b1e0bd1cd012ed0052d089f78efd29db. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/JPVI01901759.
THE RISING DRAGON -REIWA- feat. Marc Hudson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271561cf1878cd889e4f8c98737c4d57a0983677b753b1b17da346fb4fe3785f. 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/JPVI01901761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda517e374ae04639c999e5df20e1e0e5be6969c3cf8063fe87e8728026b11254. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DEBZ72000414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53136ed6d8f47462bf2688b615192c0ed80e7e6f963b3773152c998254f859ab. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/DEBZ72000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde25f1243e4f78d6b6a3f5b5e42be6873a07549a0cb8b5b6ee80a6a300d6d056. 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/DEBZ72000418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4d40e9366555480b43570d93407330141af8a80873691f62c772eefe060624. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEBZ72100173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2f524dbd92511e9b444c53f8ef65df9fad4d098126ede4fe2a180fb2af4732. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEBZ72100174.
Caprice No. 24 (Ryoji Metal Guitar Classical)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78271a9da357074147f8828e75a706b87f5f622f28df2e486a66e5a96f11058d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ATN262423905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5d47d8ef7151b78aa5328d61e8e90638fd3c647c72dfb14d7d5b5ecb162d9e. 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/ATN262423902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63963f2683de7fbac321f5ff0cd6f8ffa0b099b0a5e63f63df4a959e27433e4. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/ATN262423903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78271a9da357074147f8828e75a706b87f5f622f28df2e486a66e5a96f11058d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ATN262423905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72862ec5e531037d202aab4e8ca82e40289029cb16aea4863b902bdb9dd380d3. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ATN262423909.