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 0x1868e52e84e699a8ee627cbe240061a128080d68b812e615e88bbc4795fa3bae. 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/f49df6bb-4548-4706-9daf-1feb8e4d73b1.json and https://artists.proofprofile.net/proofs/artist/f49df6bb-4548-4706-9daf-1feb8e4d73b1.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 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 0xf7ef6c0b793d819d117380e4c2e308e6c55471db74a3702d7002c3f048af72ea. 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/AR5UH2302348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa848569506660c7800dc6e79b992ba0956a5049f0e78e72e987a65e9e20fcd9e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AR5UH2302349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b524031e884822c5d785e9246f37898b58ea47382684cd165751c6b54d29e8. 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/AR5UH2302350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d22afbf8f3195170c32dd4bcc51f3e000d7f7a048d9bf9f8f98275ac584b3. 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/AR5UH2302351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36203b69b56bfef40d5b8b7de54efc66996ecb11e8d056d30eee01c699aaea3a. 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/AR5UH2302352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205b4786c977f4ed505bd34d1cc6185a3bb34713cd3057437b19437c01036173. 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/AR5UH2302353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b438e912d6c27846aebac3a253e6bd65a6366a8fb34749f56d1928d357247bd. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/AR5UH2302354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b65d71ee790f1a2182a84276f7fdfbd46ec523fae81b566ec58d8aa3b9032f. 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/AR5UH2302355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89aeed3d3102ec9512dc2e7c4ad66b74b0b60b7dbec6d1b95630d35cd94d54d. 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/AR5UH2302356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9020e5c90a4a209d1df5919a1b3839afee88ee514c512e739b5cebc837bdad. 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/AR5UH2302357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43e8862e97045009795f4e28387ba8f10d762051c1205528741cb2e7cc62fa1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/AR5UH2302358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f08fbd6a9fd8e3f8c8a263483fa75c7708b66c999bfe03457247994c3e8252. 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/AR5UH2302359.
En México con los Federales de Nuevo León, Vol. 11
En México con los Federales de Nuevo León, Vol. 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f23cda5b0d73a9448455bf646737e8fd2ce4213bc7a9aef41116e1ff8ac1826. 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/ARQIH2300964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a74eb63942b8af86bffde04b80b696f8326108c14dca61f1c588a6cd7800eda. 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/ARQIH2300965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf580d9c0805a20a3169828e8d6b25cfa6e5e0ea95a67f30338ff34289b7f80c0. 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/ARQIH2300966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8706592a9619928b94e9161a2ae0ab6ad0fe355327025628de893a97e17a6f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ARQIH2300967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c72e283c75fb564d9478bfeba4b59508645b639a6eae7d58fd26828a5d2668. 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/ARQIH2300968.