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 0x5fa0013573d77dbf6d5e5c2febe092b41463011c0255eb83fc9722020d330740. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6be6ec35-6b9d-4a7b-bb5b-5efd2830cd17.json and https://artists.proofprofile.net/proofs/artist/6be6ec35-6b9d-4a7b-bb5b-5efd2830cd17.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 0x63071b94fc4af942345d47dfd01c7f02b0ad9fba89b00875f145833279f11034. 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/DEE882314303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11a3a5423d08c035efb437a3d319f25b259c3bc82fc22c74bd9b0d8fea086cf. 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/DEE882314304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9bf971c4536c4da5f18cd8f7f83340262859c20cf72884d6c0a2953eb47504. 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/DEE882314305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607cb7250c438f7a0cf2a9642afa64dc3558b7de4ed25caca58c9de9c64c1d32. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEE882314306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9783e19f0a6ee8805f79f5975893ed2837043d2687238f35846b0d47fe1198. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEE882314307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373125a91734fc6505596e5ddf7a59b82e6c5105e5f3868b6de6c3659abede68. 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/DEE882314308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16d277f65f4e09ef8fdc65352ae3ee0242366fe1011c827c3e2299462d96ec2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEE882314309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6f3f6b68d2d48c325fbb6db8b57cf4cabe5b9c2e087759c12ac28bad840782. 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/DEE882314310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006c4f25ad94f7edb3c6a5b593b46f1c379fe5103d8bd439a3186b369ce2c83c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEE882314311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa98942d61f09ff1e9406a7cfb3010eaca091b9ddf28ded17df57ca04ab453a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEE882314312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7939cd4cc232aea24473bcf949eb299df37ce72d0649bd5bb8149616f3f4a4. 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/DEE882314313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c711ad547e55238fac3b354557ac94616bf7664aa5c0436f3a66827f0726b3a. 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/DEE882314314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c711ad547e55238fac3b354557ac94616bf7664aa5c0436f3a66827f0726b3a. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/DEE882314314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9bf971c4536c4da5f18cd8f7f83340262859c20cf72884d6c0a2953eb47504. 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/DEE882314305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373125a91734fc6505596e5ddf7a59b82e6c5105e5f3868b6de6c3659abede68. 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/DEE882314308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2204d9322e31307cfe52e7212956ba68baeb784c6965c0ac71912212ebac5. 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/DEE882414303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9bf971c4536c4da5f18cd8f7f83340262859c20cf72884d6c0a2953eb47504. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEE882314305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2204d9322e31307cfe52e7212956ba68baeb784c6965c0ac71912212ebac5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEE882414303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373125a91734fc6505596e5ddf7a59b82e6c5105e5f3868b6de6c3659abede68. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEE882314308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63071b94fc4af942345d47dfd01c7f02b0ad9fba89b00875f145833279f11034. 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/DEE882314303.