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 0xda0e435eb23ec4189f1fb2b4ec98f913063965367b468dbb10da833c6d7fb1bf. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67e69c81-b128-474a-8488-a4508fb1f7ac.json and https://artists.proofprofile.net/proofs/artist/67e69c81-b128-474a-8488-a4508fb1f7ac.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 0x0ae9a4bc7e55e9872445605fdb40e0d4fa2e0b73f4a997a8fbb8b56d7000772f. 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/BXLR81500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2939e2384ac30ba3cb4db0ff78b63a75f010ebdea98d614893822f917016c39. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRJ801400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a37e4f64d0e38c5480ab1c99052db1523a25a38c780efb3627c5f28ffb30f67. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BRJ801400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b9e167e57a37fa9a8c913bd7eb5281d71d1e94f1d28c713e71aff77dafc916. 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/BRJ801400060.
Come Together - Tulio Mourão Plays Beatles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ecaec00a9902ed86d25dddadde720bb33cdf2dc466ee3e93b4ea963542f3a7. 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/BRL0P1300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3903f4603436ca27ba9b87eac7acda2c7b941551e1d41c7a9b80f159d9483f81. 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/BX13W2000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2054f790729405465018ca545050d52b29b97d599fd568ef4424b1ca2ec8c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BX13W2000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5314f2fb5502f09c2e58a780a030bd121b98c66d03612672185df6ba9d47ec9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BX13W2000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaac1cc768e1b486d60766208ec1335ee6708311e600f1bebdaa7fcacedcf8cc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USFI89300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fda97894f766a64b5b434e4ba9fd2c1b08933ed56d823b6d898f96ba1d58c6. 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/USFI89300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eb448b6ca92e37c8138d830ba5b96c4d3f9668dd8fd208433f5765512ba7d6. 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/USFI89300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8e2a6f1341e42d5c4462aecbc67a182c7781794acafe6a9f03a66ce6a75441. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US7VG1523258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ad4db02cca37897f7a9b2c9880e9f1dfeb7b7a45907d9d86be744c5e21ba76. 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/US7VG1523260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5371f57e94ec58f6f0abe4a4927a5cfe9b4ce3343ebf6cd7d4aa2615a8be67f6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US7VG1523261.
MPBC - Túlio Mourão (Música Popular Brasileira Contemporânea)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4da4b20f0cf1bbd3618e5f15527367a48d933b43c11960cb260de08d70eb63. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QMDA61405719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1e8426444d501ff3c1456eb430ed8c060ad9d2b0c96a8d6719fb201c19ba94. 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/QMDA61405727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86df2c02cee1c709fd9722fffc35cf178fdde6c2fbaff461bd467e85171caa9. 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/QM4TX1746942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb86c899ee495f553c1a3d15fdafdc018f929c21a5b7a15c68d31d2653a5227. 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/QMFMG1329179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c2c6b42ae51ab200fb4d72221a634686d396d9436336511926203e6da35eff. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BR9KE2000007.