In musical terminology, tempo (Italian for 'time'; plural 'tempos', or from the Italian plural), measured in beats per minute, is the speed or pace of a given composition, and is often also an indica
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 0x608c993b9b704cf0f46460500acb33a15e9f364d6428739c2d8b717fb3eb3833. 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/2691b79e-ab1d-47ec-b703-29b44799399a.json and https://artists.proofprofile.net/proofs/artist/2691b79e-ab1d-47ec-b703-29b44799399a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda0ffa5c4055495314b727c88305aa286b3f659ec94035cb0e85d77726722cd. 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/QZ7R42052769.
Playero 41: Past Present & Future, Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe33b40282fd59d32ad5c4163d4611977c586178eda4e6ff2a51bbd28a944935. 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/USDHM1004454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2927b25199c00cb2bb3645e5d348441c9931d6bf179bbed62aca0d5c77b830bf. 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/USWL11600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cfccf3f5428d0c8f0d79bea67a08c90fba5feb53f03ea7fc97d4b610233752. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3B90800019.
Siempre Seré (feat. Secreto El Famoso Biberón & Pacho El Antifeka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3915bab1ef56deede2e4c1167a989b094662567c5f9af1bb68dfd03a5b1f476e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSD12100713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb9c91cd327f290364f330514b08e2eee6fac51a8603943a2754767c75ee967. 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/QMDA71853776.
Lejos de la Muerte [Replacement Killers]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94141243bb416fd8f513352b668db9f6029f19b93e04163729f0fd69966d9763. 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/USDHM1012908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aa8e8958b640120809cdf847405de012dbc9afdcf782953217f8aaf033467e. 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/QM4TW2026982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd3e60bd23568bc5992c91f11b4ba0bbf57a6b69447a0070b5da7a6fc6af5c8. 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/USDHM1012907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b747ef47dd2e79353021dede1b091de2be00bb7b1d580aa98dedff29a8d2231. 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/QM4TW2026240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65769c531eaffbf0adca597ba334dbbd258e5462ad81951bb7bfe50f0f401732. 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/USDHM1004461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab90f65d9f419f079854388db692ff27d92ea379d1ee3a3a580396d6e5bdfe13. 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/ZZOPM2239696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c506640e40fb1121a3bfd79821b11cc201334508d440ff7854b426c0274819. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFME2163656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361a80b4da9ecbd0d9671ae9707ed67ec7a353df3cec79f53510681d180485c9. 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/QM4TW2026419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b967c5257252cf1ea4dd0ea20ef22b8d7bf08d6bbadee6e2a588cb985f0d1a5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMDA71854625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4945dc5ee6aea0b23d4aa3b1f98aba68c7b52e1f5255d32b09a5b3f6269e90. 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/QMDA71854637.
Free Tempo Remix (feat. MC Ceja, Mexicano & Getto y Gastam)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0e0662ad8083c880f08b2381d2e57c5493adb3a2a1865fcf59ec3886c3c80c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:59Z), 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/USASN1301055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab90f65d9f419f079854388db692ff27d92ea379d1ee3a3a580396d6e5bdfe13. 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/ZZOPM2239696.