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 0x8e8bd83e5f8a9f95fc56fa9204ab9bf764ebcd3601288294833018b2d36f2a22. 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/2429092b-490f-4881-b18d-14f84707f316.json and https://artists.proofprofile.net/proofs/artist/2429092b-490f-4881-b18d-14f84707f316.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 0x0166acd50ab1d63e9162e91a7a6f1b29c4c74ed8e5965e6dbf002c8fa650413e. 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/CBBWP2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8093746b9cee2b59d94128c2a828980b985b18ca8ff9658d168f4ae9e03acaa7. 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/CBBWP2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b405b7a1975a6b7b8189edecf9bbb7d73fcd9f0106d15faf8ec909ff28b5b9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CBBWP2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a01ea0f3106e63322c3bc1c4e521a89f159f7bd8a2d75340b28a40fe54ec34a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CBBWP2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb142316cc65ee9013891c0cfb1b77b9062f7cdc5eeeaf2834726b0327cce5988. 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/CBBWP2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce97810f2a41a90cd01e4c040d30b6f75b35d71cd60cef4d956e3a25334bcd71. 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/CA8QE2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d42a16545e7ccf224e7f92b5d855a1d79059f15523649fd6c6e69bff3fd1ad. 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/CA8QE2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638170856b0562e2dc99d0c34227951c739fa83f5ce2ae8790baa902384bbf7b. 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/CBBWP2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a1db8ace954fd907ec02d08fdfda3d3b61e303ab77226660f150c31d42508a. 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/CAH681800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e41b82a385366eca6c3464693f6e1fd1c3829747154e9a13b0bd82104fe3d8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAH681800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9d08b9dc45d202240ef8a5bf4eac9f92f582f9cbd2403e0b0f314738d10ed1. 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/CBBWP2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb9f9193ad090733280c3218f436f0a229319b69db5dc4fd5c752b9002c6f5a. 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/CBBWP2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1c87d0b7b434a7c74f593a6db07c8327b50e1ea1b75de8da1524ac5e05c261. 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/CBBWP2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499ddd0b334087c01ff59fcfcec6320cfde0809123efe0a489f30468e3c36dc2. 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/CBBWP2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4600f5f97802b10dd15ca4037fd3d0b7e4217c9187a273d3ae8e8f5781e0f825. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/CBBWP2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce97810f2a41a90cd01e4c040d30b6f75b35d71cd60cef4d956e3a25334bcd71. 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/CA8QE2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e469439d61ff0cec282e18c21203a6a1324e192a6acdc7f0c5cf7da10450e5d. 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/CAH682000052.
Carnaval de Finesse 2 : Les Chroniques d'un Jeune Entrepreneur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2d34a757288d1232b11098f1bd5d767207040ec6af37917a9e5e0cf66ec797. 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/FRX762166585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b5bfd45d1ebb71a3ea61d208a42a235cc5b0e07105a9046280590737498dbe. 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/TCAIJ2435163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc259b2e8a85c7ac82ccdaecfeba396289c7945c16df3a361d9d54639aef0840b. 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/CAH681900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64a1832d894a2378a9acf29b2cb41959614a0bd371850ee37869a2419baa9e1. 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/CAF661900845.