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 0x99b387c15fd26f04acd11bdb51ccadeb91fe35c32a07d42a355dd5d4046eb047. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bf1fc6a-02fe-4e68-9c5b-76c94694f6ea.json and https://artists.proofprofile.net/proofs/artist/4bf1fc6a-02fe-4e68-9c5b-76c94694f6ea.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc99101f8e715aac54840468d17f38b137cc971312870510c9406fb5bd7a74c9. 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/USX9P2378048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0199fe60a5374e3a2039b27577e42c2a0c709e1045779a999f0ecc7421dbeeb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXXET2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aef5c86a798a45209badf10bf3a50cb92e3b842881c42964826d59aea66d8e. 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/BXXET2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd25dbd190b068abb096bc8122158c914fcf9bfc912922f017f294e2cf982ce0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXXET2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237ac79a69e9547d7ee64a956cbb4d29c480d79aad9b7e785118bfea8b7e667a. 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/BXXET2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f00076cf8f18064b77afc1747c40319d9bd75eb9960db544d0ad5f8ea9b072c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXXET2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda19c67a6c46cdb6d25ec50d7d7456eba1e1e853b86b4ab665dcdd381be79cff. 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/BXGOA2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025914f8d2814a8f2852a15498db17b0c2005a1ee9bacc81307726f375a1b4d1. 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/BXGOA2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde57ed40a05531f3cec3520ce15028a66cd72a65c9993d976539683e46226517. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXGOA2000008.
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
Escuro Brilhante, Último Dia no Orfanato Tia Guga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad144715c83d071a58b92697a06cf4443f58a36e7d6b1e57787e23b65db8e71. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJEE2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379528440e3b75f1185570d69fc8dbed9a3cb1cf6e3d8270dfea0c5ef0a87c5b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXJEE2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3b93858fa83f7103d97355056677becbfc4cd808e899d695397a4eddc28b6e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXJEE2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788e7eb2c17bf432e0e4ccaafe7f502e22079aeff80be6a6690af4e0c73a60d4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJEE2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa424136cad8ab5efd38b29b83a41d1b0388148d887826571901e4b8b10d4272e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJEE2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fed9b5ed79e0e38c6cbb2308ea6989450b0fe0fca899ee9fd738d429e567e87. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BR1B71500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a111f4e5776c89f0d20f3bd19fa8a6b76506669879171a4dd142d7b102cf3c. 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/BXJEE2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7088cd035dcf6df2fd79bd321074477b536940944798a52f505d33b955c472c3. 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/BR33T2000001.