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 0x122ade44004f2bc8f33124ab9b61f1e0a9198ea7dceea3699a0d743c60a3f4ea. 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/26584363-6bf8-4c3a-8664-8abdc6fdd2b2.json and https://artists.proofprofile.net/proofs/artist/26584363-6bf8-4c3a-8664-8abdc6fdd2b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Male Chabelita (Música Purepecha, Abajeños, Sones, Pirékuas)
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 0xdff1bfc8447f26c5152ff20f4e69b24c47cbd3022dc0d46781b51cbc543c10b2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR2X41418678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807997d14beb070d28e4458fffed35702f0cbee348cb9b36a50a75c31301c1de. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X41418680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802887d960ed1ce6904649e0cc7372744c9e6f4dd8ae6b9d32b16b57a4a06ae4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR2X41418681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea860edadbdda2e65e58d7e4ea4d7344a4371490888735eca02457cc2d54bf46. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR2X41418682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c2ba6c7b6a232b2f626194e224707c366797ad453200afb33fb7842bb17c84. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/FR2X41418683.
Popurrí Abajeños / Hay Que Suerte / Male Barbarita / Mujer Alegre / Santa Fé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63af7a1d75251772fd8cae719259ccf7bf6e4a52419b7deef4f6b78acc3db5c0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR2X41418685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19389301acc8c88adfbc5d692727f64703be9f9ac90899e565fb34f4e429d8f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR2X41418686.
Iaasï Anapu Úachencha (Abajeños / Pirékuas / Sones)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf165d91cd6e34aeb96cbbff509f3b3db6e815177f0f7737c136a52f6716ef124. 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/FR2X41471543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05377de9e10430ac890577ba0799a3d8ba747f7a78edaf94c375a209b7be6b2c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR2X41471549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a1ef0812a039bae2a6e60034c413338db514d80352dc6c2637f708bbcbb27d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X41471554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c4f69964681204772480040c106b85c5f7f5ab4a949c08840de922fe6b820d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USV291459262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd351ece3a1118e3547165079c49b7b5b342405010dfc3ef7d037063a8d7de01d. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:04:38Z), 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/USV291459236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9101f6e6d6a13ce3a02c3774b571f0078d8cd066435a9e9c6a8998a20471e73. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USV291459240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7205b8e2e007da5d6dee502d6b39a8514f815ca765952edc0d36e261170f2ff3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USV291459273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5828ec08cb921f20055a770be963de27f02a47740656362d54f12adcef55743c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USV291459215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65746a5aafba2f24c5e47f729a99d106df10cd7fb8787663a53056c2e9d2958a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USV291459228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198427323d844b05f2f1dcd4c21979f44e78bb36ced155312bb13a3e901d927d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USV291459229.