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 0x7157ebb1b7d56f8c87180e0c90df91e082f0af31bed4e6cd2a6808f46cbbed6a. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d2e9ae3-fa31-4024-8e0f-b722267f4461.json and https://artists.proofprofile.net/proofs/artist/4d2e9ae3-fa31-4024-8e0f-b722267f4461.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 0x5e6c8430b5b3abcabb0558b8f9013c09bb05919caf24e7a88d5d12ec7a6e938d. 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/ES6172424075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743bd5ee7d1c5651c4a1a3de4c2ea3d46bad993d9fbfbdcec226bd4421b590e1. 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/ES6172424077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b9608d5065d8822dfba6a400dbf020f8fdcff9cfc3a2528864e5593c7d6d9d. 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/ES6172222391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa5067e5fc0cd533e3686aa9245c5393449266980c1d988199701dc13a5eb40. 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/ES6172222398.
Hablaban con frases hechas (Remaster 2022, Edición Deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac0f43e9c96cd86f8ca8d50cb1d5e3f81fabe1563c1a5de4d72ee17f97c8fba. 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/ES69B1100012.
Música grabada, saltos y cánticos (Remaster 2022, Edición Deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea74b607003ad2048d5061c10943b6d321e48520c50d387e4736b8660123c20. 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/ES6172222370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab47bdb367b713bb98beddc32090b455ea6f49adf0612a3528d9382b454c4209. 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/ES6069916409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa805b614c7a70bbf27a61281f1bb73f280964ad7268beb00f4f357d90601c2bc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES6069610106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15289487438ba5345b7e504ea81774a229e74017b40e32395ef7f694a4a1a10e. 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/ES6069404902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706c8b9d4cf6e4e53993bb02851b35f9733ea40ec7a1547abe02689e168dceac. 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/ES6172323135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3867947776cd208a470e5cf3a93d376e89e343b18f5f890add3fecbcff682f. 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/ES6172323150.
A Travesty of 60's Girl / Dance the Pulga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08778d1827209f7ddf84cafb69746992450674662767b45db9fb45a6fb01ab9. 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/ES6172525004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5ac38270574dc15a538bd7ccc1d54e0de481001dd2ad6321de917c9ade8b28. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ES6172525005.
Gijon Goes To The Movies. The Dirty Dozen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58fd43f264bc99b6ba54063072a06a9382b75014930786af6453e41f56e0dd3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ESA031913005.