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 0xa705f9f9dc5ed1e95bde53d3591f8094c0be7293c6259d09a4bdb4b0308be3c2. 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/94468d20-37ad-4b5c-858c-c50ae619cb10.json and https://artists.proofprofile.net/proofs/artist/94468d20-37ad-4b5c-858c-c50ae619cb10.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 0xa725b9118bbb30d860283e3182a2a983eff731820089f5e48c6376d0ca1d0324. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BCPC32100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f3c3e3de38ea4cd84ce202f33dac53f7aa2f4a795db0083e6bdf8b978b0e51. 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/BCPC32100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e3197c7ed042abf286ec053a4f70f7e92a9fbf1163d480e2bc4d3c5af7a3c5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US7VG2120934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1512bd0e836ca5af606df96e2959205f4824c7a65f54000303318248e875e3f3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:34:09Z), 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/BC3RH2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2964b5d6150b6a894d5a34a0f04122a67ebac08f8cdc21956eebb45bb7868a47. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/BC3RH2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34a7dc80dee09d82c08c3387d7c6b69627bc6b39507b0c6e78cdd66a4b2b851. 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/BC3RH2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e26d50256a7ec181f78d6d7db1c88774bb85bf2276a35a1ac1dd15417f33a92. 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/BCPC32300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc01bccbe3cbc440a0a8449f3b83943c9c68f158d558028ec98d0f75c268060d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BC3RH2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6606b525a12de21f2ced53e5f8f1f7fbc786e574dca2dbbb17d70ce2cecd06. 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/BC3RH2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb504722da954e7f69ba062fa9ac514ea5e9eb526ac9ed1de89c5142ab5d296ad. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/BC3RH2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2c6eed8a1f7ab4275eb2e6fae32076862413423d104550261eac72242a31f5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BC3RH2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a8b49b40c95fe021a72837887b4d9318defd69eaa9290b25e35372938d23d5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BXDTM2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1764ab09efd24876d9293363a418779d2ac6f536d154e48dd43874dfaca5a177. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BC3RH2500002.
35º Rodeio Crioulo Internacional de Vacaria: Voltando pra Vacaria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b82187eb524ba4497524935a6443e0e62d82859f7e12a8020e58e96f4c8e2e9. 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/BCPC32300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09e495f19dc0132b817ad40211342d8d7faa6d36b871a24e4ce6c45d7c71ae5. 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/BXDTM2300006.