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 0xb712edcffc428767c131c9d87e7678a7abd340382532abe2ae4782edf389e30e. 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/db36a4a0-c054-4d7e-9420-9aea1091459b.json and https://artists.proofprofile.net/proofs/artist/db36a4a0-c054-4d7e-9420-9aea1091459b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Saxability (feat. Stefano Cocco Cantini)
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 0xd0bba316b510500d5b1dd3bfd3fbc152f6a5aa3ef16471fe5a05c09e8039f601. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/IT00D1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa391537c7bb35027eae86051547a1fd504f3651bce0ffe8097744a540cd9bb55. 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/ITREI1700218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35c337c390573892ad88f8c31be8d60718d5664ffb5acc0cc520b4c042b5540. 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/ITREI1700364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe515ece4232e4a83f775ef95e67af051c7abbdd31f5305d45fce5386c88590d8. 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/ITREI2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d848257179c3d0af49feb39066bb57f31dbcb7e4afb99b7ce6c7621094b07c5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ITREI2300041.
Crescendo [Resonances (IT) & New Horizon Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe559d88fde711f4869fbd023ca760a8402bb6261ff7a9e5cfbb27f8318ac0fcb. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ITREI2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e277e0230dedc67239d45a7d5d722be34d2623acde20a746b47356a2f691a55. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ITREI2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a485ee0273b6b48da1e96ec4d06963813c790f3db5af8d36a8e5014e2a704a. 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/ITREI2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beaaa87a316fe38d3f821c1649fcf84fe932711a5883973db34bb611520b3e4. 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/DECL81600254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b3d8c90146ee48a675b52d7237195f1ae0d5d556984ca1bf2a8a49a44b229c. 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/ITREI2200033.