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 0x64e025cdb4f7af6e70cee09b5827e5dc868b88e16c8ae0e62bf24bbdc8f7dda8. 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/8d6c51f5-42c6-4e75-846e-963cac6cdfaa.json and https://artists.proofprofile.net/proofs/artist/8d6c51f5-42c6-4e75-846e-963cac6cdfaa.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 0xc4029262d09c8fea88216dc0f6daed51a9c92293cd880b5174da29cd5e3258b1. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/DECE72106278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3149c9314b4ad38e9fa33832bccba302460a8cd00bdd7804136c466173366eeb. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DECE72106930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb964da0428a8fca0ecdb842a3ca4a77b61c9ddd7227425ba14a4c7251ed2cf5b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DECE72200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518cb1be8a303f4d2bb91d6f2eea4b1cefde47b10f9d0b8561c36fa4ed9bd280. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DECE72300619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eb7310ae6e37b29b501e83b40f8a9db8fc4934e80311c255a77589e8478529. 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/CH7812530958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559c32c982926dc5aa94adda3701a9729327f8f8b334952a89b083113181c7b9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH7812423942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a64426e1f88af7e5eb2f8d83dbc6545f93b5d89a8e36ba912b6394aa5f68d0a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812420639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbee4f5b238472f3c49f369a6f2eece3f09b34b5988b2f10177980d03fc9e673. 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/CH7812425197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f277e848493a095173f8baa292b3a64219260959dbe0f1a102ed15f1c61eaed. 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/CH7812528295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c51d2c207868e0ad69461a2de8c9f9139fc1146bd7a37f5fb5ca2a83f7e32e3. 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/CH7812527334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07ad80d2e2b272c69679c85c75342d00f9bb7e68ed2d2857358cb43251a3a94. 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/CH7812425388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0738dd8eea56ea461857e87ff088cd54becd23465e81f0ed6cc926eecca337bb. 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/CH7812421316.
Team Biggie VS. Team Accaoui (Part 2 von 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac7de0959614592b79274460f1cdbed066245c3560f91b275fc7e426b2b140e. 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/CH7812423477.
Team Biggie VS. Team Accaoui (Part 3 von 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34629f8b417c12e620d82e69022217b16eb41465353fc444da6920bf2ca9ea8. 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/CH7812423478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034ad6d59174b53d978bd4add5535c459994ea34aef4dfef615ca4e25ba21d5a. 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/CH7812531502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c51d2c207868e0ad69461a2de8c9f9139fc1146bd7a37f5fb5ca2a83f7e32e3. 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/CH7812527334.