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 0x0835536f8442523035364a833c4f8c3afcf8ea88a42cc9027af7d282f4cb9350. 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/9733fe81-1904-46cd-8572-b5f672ea205c.json and https://artists.proofprofile.net/proofs/artist/9733fe81-1904-46cd-8572-b5f672ea205c.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 0x04238dd3ec01015d735025e42326d2094f582ce9974f0f02aebcca0e18c18cb8. 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/NL5BT2100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6466ea997a4890f802e38f696147b6cb2f300561726f96e11f97948f440530ab. 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/NL5BT2100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa0336d4feb406d61fd06c5729985449d08fef6b0254fd1dc6e718cec52e58b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NL5BT2100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa4697d6d0963139128822026d3f498d601eebce72c54eb8bf6a18817b6c084. 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/DEPQ62201224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d4a9af26f65c811ee9bff0a67ddcc85586e96148145d87a242b6b398099d0. 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/DEY472279745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50543d56c1d80a115b0eb328117254bbffe1b7ead513a1b3ed92717c73d0571b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEY472279747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10605be93f6e50ce74097b82f3965b85dbf75a0e23d1a9b7f2c22896bac84395. 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/US83Z2310760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5438b21e44ed4bdf1895018b715606f09447d7faf57d5841328f1013bf84ef26. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US83Z2310761.
The Call of the Samurai (Joe Carl Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb603a3a45e9fa22fd75ffe40121d83fef046f001a29d65dcd845368792ac27. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/US83Z2310759.
The Call of the Samurai - Joe Carl Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3526241204a875b9b027cc9e48fba57e27b7505567ac6df970b13360e8932310. 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/US83Z2310763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386e205225b94ef662f6cfd6541237f8361d4335e4cce65972409e763663c18f. 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/DEPQ62201222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec2bea196b58892dd386608d5611420842c0fa66fc045ecdf8de5078afe0086. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US83Z2233312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802dfc2bd9965d7463fd4303a765d591542e2a6076a788300113ca7dfb7b20b4. 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/US83Z2222893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec7ddf8b78c5279065c8b2d0f30d64ac47ac8f3a5843d5352b0973c2bde4e6a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US83Z2221203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc392230a6106196ba82aef06a5fc7feb24ffbabc9f1102df1c183c39922f6d11. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US83Z2149545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec7ddf8b78c5279065c8b2d0f30d64ac47ac8f3a5843d5352b0973c2bde4e6a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US83Z2221203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10605be93f6e50ce74097b82f3965b85dbf75a0e23d1a9b7f2c22896bac84395. 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/US83Z2310760.