thumb|upright=1.1|A Smith & Wesson Model 10, the most common revolver design thumb|upright=1.1|Firing a Smith & Wesson Model 686 .357 Magnum A revolver is a repeating handgun with at least one barrel
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 0x930c6c3313bcefe469f9dfe23e3d4014a3d869b84b5a961bec9ae251f963d777. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c9fb3b1-99ec-4139-a04c-b2e18585851d.json and https://artists.proofprofile.net/proofs/artist/1c9fb3b1-99ec-4139-a04c-b2e18585851d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Las 100 mejores canciones del Rock español
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 0xa42a7603712223fac3961e1193ff99938ed977895976f8ffb0fc260497990177. 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/ES5150305001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fbc52d492ec7e2e7c84ba74c97099d5c17b3648d2a5e25c630a1505770468a. 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/ES5159305078.
El mejor Pop español de los 90. Memory Park
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc179f74e34de47460ee10787aa1e028343b20f687957cad41628e5cee3751abc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES5151701163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c2b73da1400fb86b8f5a11ca942c9e778c09a00a1a35f66bfc521268eb9b9e. 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/ES5150605003.
Cien gaviotas donde iran... Un tributo a Duncan Dhu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96615eab92b02369af4ba3e5c7076e052e8c77229f90b94040fc35f0e8d32d9. 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/ES5010500375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ea6f882dcc11c5affb82a7e005bbb5b7d99d07e00f8564faa32883c5e2816f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES5010500378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42a7603712223fac3961e1193ff99938ed977895976f8ffb0fc260497990177. 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/ES5150305001.
Pongamos que hablo de Madrid - Versión rarezas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71a4642b85800d0730b6faefb75bd22fbcc7aaed6a6b210859f1868ee5ba9fb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:07:11Z), 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/ES5150205079.
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