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 0x54c549a3bafd99dbec2a08d0077fe60bb4376d747bdb44390c0b638bd0d16f5d. 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/f5974c56-1e8f-4655-9fe8-743933e714ee.json and https://artists.proofprofile.net/proofs/artist/f5974c56-1e8f-4655-9fe8-743933e714ee.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 0x24bc8ef717d596e8be58f3f12848343afaf07dd98b0ab5bd33df0184eed38857. 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/BKNDN2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f670347e535eb38206465d16d140f6c30ef9714ee3ba17cf5dd679f2dccd57. 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/BKNDN2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8836cc9c29e409a5e361d7b8a19e2e30e938fdf00676662d4fa23b6ed56f34c9. 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/BKNDN2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9456bda3e34cef1690965466ce26bddc6cbde23e5e884cf53f0868067593aac. 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/BKNDN2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03569c08a56c30698538797a90d4e595c86bec512d2c389768162bbee047a6c4. 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/BKNDN2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb614cdd27acb56751f62cfd4c80a5ca224c23ac5e56b40d0556961633cb6447. 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/BKNDN2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d823bfc6e25db3c12d2e77f2b3721e19c20ffcce8c18ddd6809724406d58d2b. 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/BKNDN2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8527515501d760f10068fbc9989e12c99d8d6a2f7bff2c763da057d3d13868c3. 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/BKNDN2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbee3cde15190e33399c1b97b8afaf47f930ced1121bea43a39415ec5e70980. 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/BKNDN2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb097a75c8794bbc49634490ca0a5e6cebae5f80300a84872a1a94fc61f0c92c9. 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/BKNDN2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d185d11bb7358c89e682f0249481a0ae0ea632b861a78b17aef8826a773bb3. 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/BKNDN2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d01b89587e88e63d06b511b557ac6e6e813a5b9236d5ba81864f9a4921a473. 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/BKNDN2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b74f6cb86d0c9e69eb948d2d1d9a4bdd4b959ea46a686d07a09e409e79dbaaf. 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/BKNDN2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4366f9d27b44355b2d51932445efd4647dfc4339a289020d3e2ec46c1fd37f. 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/BKNDN2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e420aba00607a51215e759125c6a6303209643579e71fd9dea5e707390b0e0f. 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/BKNDN2400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb856c102c1e2ca24e11e2f7c3f89f851a5ce8235b049e9d97ae53b3f0b2afc. 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/BKNDN2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eb13e2c62ccda081bdc17cbcf194ca1e740df88238c703ffdcf2dfb2764229. 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/BKNDN2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ff1d35a3c64a4e0810715ab9fa931774abe6e1ce51e7241e9b8720134986e6. 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/BKNDN2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b72c1b950cac8fa3c2593c242d3cc5b71a5e9a49b170e7d60251f028427f7a. 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/BKNDN2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14531a5ce9ba8fbd7528990ee10cd8a8e30b6c68c8cb8c82387469d1b5faa89. 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/BKNDN2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb021ffb473602fcd84098d7e88edbc983af88b56406efc14fc82153825546a11. 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/BKNDN2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf775f9d6fd239d0d8abfb75866ca7c46b054560c200c8e9aa7e91ab7e0cfc86. 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/BKNDN2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc223697d6821eb91fab85475ceaf33e383b9921aa508273fdd9064a5eb320bc. 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/BKNDN2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f0fa3e4c1a3d25648d7977da8abe1c4898bb5bcd9938c64e229ea79278940f. 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/BKNDN2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0177b84750516a6364da1d306ea9292ee4935110a88a04ac845d0d92b3e67d39. 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/BKNDN2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb3f0a1f21506aa9dc3021075f242411b0f3036df87a73941a52d1892457d42. 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/BKNDN2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058bfffe0381138e578705aa4590d42569b8fad51ddbbe6df6cb916ebf1f0af3. 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/BKNDN2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4effc6157593dacf3a2d8a16582d134563a0518c7fd36713b73ba322520e6ffc. 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/BKNDN2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815090db9035364072994485e9c8bd400fbbc008330fa398f22bafbc111a6af4. 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/BKNDN2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec13d9ec8d780477f565672c458113b0203e98e5dc6b173042926b4a3d526f0. 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/BKNDN2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d91da6c21cfe1e83eb428d8831c87bb8d5395611287a44a5910f709d5f960d. 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/BKNDN2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa25aec05b830fc7e47b94cdaf2120ea5985c7881c3e7a824d47ca519c141aa. 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/BKNDN2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b78cfb10203fa0e4f8f8f2f64119d041ca0597d70f44d04cad22d29f5f157f9. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BKNDN2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc33ba4632034baa7f223beac617531ebfc20a56dbddb62d0abc2fcbd65f06a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BKNDN2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c52d1302922afc2514209079112b2efafedb0f31a915d7958e3e7bd5dd61c1d. 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/BKNDN2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8393530b426b0af020940e3cda6bfab69d297c388c64ea8043f5dcb5037bf6. 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/BKNDN2500004.