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 0xf91358c3e9fee5ade4dca4c5edee16610944fe520d2f173e9cb7dda72e49324a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1dd50e5c-6172-40fa-95b1-9b9fdec72717.json and https://artists.proofprofile.net/proofs/artist/1dd50e5c-6172-40fa-95b1-9b9fdec72717.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orquesta Tipica Victor - RCA Victor 100 Años
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 0x408d8601a16a7e82d4cb02972e7ff042ce400b9d5c92abfbcc71c4a70a7b83d5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ARF030101453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080a41529d32e3895a01288be59bb0ee4f625943cfa2a962674c3efa3c0d64f6. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ARF030101456.
Serie 78 RPM: Orquesta Típica Victor Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc57e94777170ede2e5db59f58ac8ad944f9d4e23a18a0d879f06b28bc6e3f3. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/ARF039902213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408d8601a16a7e82d4cb02972e7ff042ce400b9d5c92abfbcc71c4a70a7b83d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARF030101453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080a41529d32e3895a01288be59bb0ee4f625943cfa2a962674c3efa3c0d64f6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ARF030101456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f178bf529d875bb681e3544e75a412304f19fcd96f643ee784c345fdd2dc7. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/ARF034000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcb4491aa8ba79fc7ea036bdf1bbce9377be72a3c71c51a446c832d60287a0f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ARF034400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f74e92af3a1f7c5c5c1a356ed906e05ff5371c3161f205d88b6cafa333be8dc. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/ARF034400028.
Serie 78 RPM: Orquesta Típica Victor Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b95f65ecee57ae1febdf66034a0865d6b04136e19368f01941b2a1656a412d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARF039500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f765fef0ac93e3daffedbe9823e9e26460e2b431d33d03f3d8ddb91f55cb4d4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USA371101422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68162940b2bad8996e10329f8a1a61deade5cf7495a565f96fcda320f349a293. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA371101447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffdced940e5ae2d31ec83c210045df1014a502871b74c1dd36223f02f71d67f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USA371101432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48b5deae3a6bd4611d366dedb0b39dd84e1672696c3027ad87ecec8b8daf2b1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA371101460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcde4398f4c6267640229e2baf55d016f616259a0bb7c572294ad98bcb1f311. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USA371101461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c40fbfc2fe12c7b4941b463572972850ebf4696992809bfe57e1d4e112c7fca. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USA371101420.
The History of Tango / Orquesta Tipica Victor / Recordings 1926 - 1940
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75acca7213dd0e218ef4b1b3639f4f1399f698598f40a89e59562a673e21518a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEN721507206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65e3abe74ccd692234bfff19cfcb4cfa12ee62380acb084096670a155e761e6. 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/ARA821511939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d23d40945027756bf710f678c617e0618d37f060866a08966b8c886c5af20f. 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/ARA821511943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f10119774b4bc6fea495cc9fbbed62e3784de7b6276514c8696652657ac3322. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ARA821511948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdc9ffeebdab80beb915936145001fe47d9931effe86504849bac315bd8021b. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/ARA821660538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3aaed79876e3c61cd2d6473f71d4d610d63d69e6ad24a8333a6c43d77ce4d42. 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/ARA821670029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9790fb2afc7c2acdec00a317f7fbc97588b5253a634a2bd638422908cd37ab. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ARA821670098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965b181faddcc31809087493025fdce806b53d001c69576eb5e505af29bb2901. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARA821671022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb340531a978baa04aa389ccf648a9373fc21a3a40a755ac6a34f965ac4ea3309. 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/ARA821671023.
Aquella Orquesta Tipica Victor Con Sus Cantores
Ofrenda Gaucha: Y Te Dejé Llorando (Instrumental)
Ofrenda Gaucha: Viejo Rincón (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8333c42e79bf3686f6270c8e20a99ace11b232e3aec2529d0c896a66814eec96. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6N22480153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df96811f3cd4a6d34bef0f1e3be634a971626a93f10ac1d56292379761605b4. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/ARA822552833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e718470409d4ba552747a0ee7e85bf4aa2233a5f2bfb42ab89f4001eb9ad98. 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/ESA011631269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11337e2c8a4cb1643480442a3f049b26c7a1da26a600c693ed2c94f4aa115153. 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/ESA011631254.