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 0x6245c53ed39881120387e16963d7953979aea899c1f0f2de57d7401b0fdf1c5d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75c90b94-58af-4093-8a38-a1474da74544.json and https://artists.proofprofile.net/proofs/artist/75c90b94-58af-4093-8a38-a1474da74544.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vacaciones en Puerto Rico (Mono Version)
Vintage Puerto Rico Nº2 - EPs Collectors "Cuarteto Mayari Canta"
Vintage Puerto Rico Nº3 - EPs Collectors "Cuarteto Mayari Canta"
Vintage Puerto Rico Nº1 - EPs Collectors "Cuarteto Mayari Canta"
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 0x8dec3b1f5d9c36846e3533285bf82ec5ef9af1744dae3bbdc78855c86db754ae. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMYW20400626.
Puerto Rican Pop Music (1938 - 1948), Vol. 2
Beyond Patina Jazz Masters: Cuarteto Mayari
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd364a4cb9cd5da2e732f55e633af9c94a32428417f6dca740b11f3cce222be81. 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/USMRE0813302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f13a3b3439f8dfe811e0cd66f9600d283832280702e9216f280af8241e13cd. 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/USMRE0813303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4de8b32f625a9fb524f6ec66028032f0c2f8411b4b407983941839ac37fc03. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USMRE0813307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705a44f0796f6c0e6dbc1018df57885471d96b875d5bbdbbc0b3bc90906a33a3. 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/USMRE0813304.
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 0x3bf5e6e1089cd3e7e31579e85927b8b5464760c1c33a70ad767004d6ca72ef22. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USMRE0813308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa62f35419f5187dc3e7830cfa918289ef394dc8fca7474c2a72b7615e056af7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USMRE0813310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d83f5c93527b585dbaae26188df8d2ee6dbd250f92ab3cd2e74aff2285b3e3. 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/USMRE0814103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8087a4f51b79e8106abc5ab2a8ae2a171f596a01df31eeff135bbee3910b62. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USMRE0814105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46040d16a9019904e4385dba6cea413cd89144b9921148821cac3b4236610230. 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/USMRE0814106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608e950b95b020ecd4cebe2012281817e9f81a1d4341f601b31b4d5bb1d97287. 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/USMRE0814107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ab920f49c84837d2f074cd35b419cc1fa1a5098f1843c5c3239f075c43bac8. 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/USMRE0814108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde41563e1db5ea8842cc9d207f4003f58b3b8e71aacfdb6427f5cc58d0db134. 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/USMRE0814110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7b817740e1ecd1488c417099423c8385b23baaa70bc99ebca1db9ed910df54. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USMRE0814102.
Placido Acevedo y Su Formidable Cuarteto Mayari- Agapito's Place Vol. 1
Placido Acevedo y su Formidable Cuarteto Mayari- Vol. 2