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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38254a259d20731fe6da1b17d87254946e4b0c92f58b90e2fd9266d511e12ac2. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a84e0e56-4611-4811-9455-09931e22954b.json and https://artists.proofprofile.net/proofs/artist/a84e0e56-4611-4811-9455-09931e22954b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carmen, Act I: Dialogue. Ah! enfin! un peu de silence!
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dec8f588d1b6324cc60ecfdbd5e4c07d593ca5541cb5c58e1be0e001873c0a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:28:48Z), 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/DEF058230742.
Carmen, Act I: Avez-vous quelque chose à repondre? – Tra la la la
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d507ff272d85e755019398f77857bb2e7c291f541cef293b34c5569adb007ae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF058230708.
Carmen, Act I: Dialogue. Vous êtes si jeune, seigneur officier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf7a783605f0e3c74f5283e0d1c301f4d05bffbe74e902d0b01e9ba720927f4. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/DEF058230743.
Carmen, Act I: Finale. Le lieutenant! Prenez garde!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0b6f9377e63d12907694ce99d083aeff4514551e2eeb23f6f6bd168fae459d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF058230744.
Carmen, Act III: Dialogue. Alerte! – Ensemble. Quant au douanier, c'est notre affaire!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357a3825e43edb9538f0bd455d2aecaff6909e048795506708b5005864fd54e0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEF058230759.
Carmen, Act II: Dialogue. Vous avez quelque chose à nous dire?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7904094369704e152efc4e425a4b7b3fe2caf9c26e3d85555dd513f804ebf18. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEF058230745.
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
Carmen, Act II: Messieurs les officiers, je vous en supplie – Marche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6041dfc4c12fbda31665178e7778f594c56c86f975e3b02d933f853b84308c4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:27:14Z), 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/DEF058230747.
Carmen, Act II: Dialogue. En voilà assez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cc2baa81fc796c1e3cb3647432211c94119d47050d235b58118439836e2fc7. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEF058230748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da33680bdf82f21f9237d070615fb5bcc2c98ebd17be2854f0902a99ce0ed60. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEF058230749.
Carmen, Act II: Dialogue. Enfin ... Tu as mis le temps!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0ecdce93fd2ae8076d6955d14fb45a6c358d15efad894c42483445a4c72e4e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEF058230750.
Carmen, Act III: Dialogue. Carmen, ne me fuis pas...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bf6b8fce6d4a2b9a535bb865a59c990d091f825e0eec9e4ff21ead7a331ceb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEF058230754.