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 0xadbbfc6d42a353122d78999f4b09a5c88faad92f0a79d486ab8e247940c5cc9e. 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/4a41be07-6227-4265-b65b-086ecf918883.json and https://artists.proofprofile.net/proofs/artist/4a41be07-6227-4265-b65b-086ecf918883.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 0x69201c5158438215aa103b67d5fedcecbb72f9ce3535e1877e1cdf3d6597b5bf. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:33:35Z), 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/ZACO10800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceeba1f5a8c5e5b0282f9ba3ae4eda0a8434ab9ffc3317c74bf88db6a165a6ef. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZACO10800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a09fd338e440b2cab4841c9025d3bafcfd0497136c755d4b36a8bc2926e171. 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/ZAC010900330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645659be604202e843c910207a265f48662fd3a1ae109aecbf5b0ee5585a6d8f. 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/ZAC010900335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2fe163de0be032ee30439c1237ecbfd879d8e3225bd0ec89fe09248e66cdb1. 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/ZAC010900338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bb052479442e9af50514cd2530946d4b8a23c186dc6e515de05b4f1be3fafb. 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/ZAC010900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd9de7d1ba8e3dd2c3be474cbecd04f64b224961bc99820cc6c16ab32dcdc53. 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/ZAC010900340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfc1158e6225715075fe6c556dde547458127ed56bacf853e6bb30ba6ee4ec1. 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/ZAC010900337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dc84752f5d2473d70a09dd3a055bdb9d3098690b75ff99c4b7b162a2956530. 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/ZAC010900332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952da506a9d44bb6420e4a7685030d6bf763c22e34565ecba21faf28b9ca4ff4. 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/ZAC010900333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47dbc28cfaf0cfaee5ebb555f6335e80e439a53b7b4099809d10473bba097dc. 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/ZAC010900342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90dd659f97bd46b15e3647d43253d54505a6f60292b62a209f8fde7d83b0d3e. 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/ZAC010900336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567cb8d69d4bc4d92f51a4f28c966b6c20c1ac16114ea8f6100ffc38e8c9f6d3. 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/ZAC010900341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3e2ba25b6b7d184d5683b411468c70982f86fab2e4a0cdddffdfe39fd6354f. 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/ZAC010900334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07102c0a532a4f719271049065c7b23b3b9bf9aba4725e80d485818a0a8cfeb1. 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/ZAC010900339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf9379a4b3a1677c87028a5d1aaf1cccaf815d63ccfb0defaaef4c62dd119cf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZAC011000466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae0ee30e9ffb940a9de4fe0a2c4c78e8f85a3935cccb6db83fc49de79a92635. 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/ZAC011200812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0c4f076a7a5653c69efd30a03b4d283749281a82ca4024d831251de7069c52. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/ZAC011200818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9f4daef66968059199c7e2fcfd045e4e4af85d5639750ff268f50bccc5dbc9. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/ZAC011200813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ff617ef4cf8766fabf4c6f4fcc3cf3068af1aa479576d398d561eea0eb1832. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ZAC011200822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a0651b6d6b37e31705eb25651c6f00b6953ad4f0f75a7077ccd920ed798fdf. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:04:41Z), 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/ZAC011200958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05472540da157f39a8e9f9b85237da757ae0e6c26c33a8e9e1f940db129fda2e. 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/ZAA641100024.