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 0xf482634b1ba8e0e9f7c216c5e92cc0c89a56f7a50333be61d8998fd114a2b95a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf4c9014-219c-4419-8a96-09bd87dcfebd.json and https://artists.proofprofile.net/proofs/artist/cf4c9014-219c-4419-8a96-09bd87dcfebd.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 0x99e95657b25af62cae8c29c026e9ece018a6d489066bc0cf1ded6dad877d9aa7. 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/USHM92113765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a62075451114e7ff8445ffc82870ea8b10675514cd0d676813694d167cbea2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM92113766.
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 0x0e55c8dc54a06e040fd6c6fcc715384bafa8c88600923cdb7467714d6053989a. 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/USL4R2370698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2594e832ca745a43f4fad55c3c53f70ee44dcf847fa1f8a3580dec048fe84e7. 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/USL4R2370703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbb3bbdef28ff94c63fa3acd3ff65d200d79fd77c5534a1eb97dfb6d770d588. 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/USL4R2370704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9061c5c56497cc3c7a4e5bbd31a14e3c9c0a1373c82f9612a32c40153d1cc05a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USL4R2370694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533e79b4acef06f0a3d4190d56fd6d379c3685886ee23e1802d9127505a872fd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USL4R2370695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960561db469f3ea1f7a14af7844a65d459ac1c40009ad28c0cfdf8fba25a99bc. 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/USL4R2370696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4f08d4d2e94db62e87fac2d7402467f3c44f68dc13887ed45d850d4e9ecbc8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USL4R2370697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2ed928ae2c6d5a00b0e8ebd15ce16a503a7bb6cc3e26af6da5e56e504c5bbd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USL4R2370699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3bcb645c8bd27a0d5c1a7cc42d467ec917d2ebedc4a4f620e542062e929fcd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USL4R2370700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717eab7f5fa7396e262b94f1263ab62221fd58f480e801df51824ca9557f93d3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USL4R2370701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86497b4fac8161c661a57e5683fe56a7998b3327b57b859aecc08affb1e499fd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USL4R2370705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fed5ca5e55ba73da728fe5c86abd04a6d0014e7136336aac50b0064b4ef1b7. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USL4R2370706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc30f5aa808cbdda3463e9af78b09dcaef3065068f99ebc9a2a2ba6bf52e3447. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZZ7X2471365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcd2717de6a49231c52dacb011e4057de84b19206acb991c4f6289564b356a2. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZDA52538964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2175eb1b48f28108416d4cf2cc2a8181b38d70c7ae0ea6b2f7522cf1ce948f3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZDA52538970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e604aeb7a9d85f99cf6fb57381f7f29d1b0b2f0b6d2abb6071f72dc33a9905d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAOPL2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa1fb6c0dd3798054263623809e2f62c1cbbde531c5c4a705eb485dd1ef7579. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTAX2376881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1b8d90290c13816078c832a0413b6f79ce155df4c5c73660d3b6a61952b3b0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTLA2498039.