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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 0xeb5e270ba85d6f9957968329ba9638aa471002460ce075abbae6731960060a63. 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/1429bcf0-f265-4abb-bb69-147c2bc328ad.json and https://artists.proofprofile.net/proofs/artist/1429bcf0-f265-4abb-bb69-147c2bc328ad.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 0xab14096e1a2cb5192ac70f48e31c83efa5ea675cc67d2cb1f311909894655724. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USC4C1000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0d7c3b3a0631ec1d98be75ee283071e1c9f65cac8bb8ecff4a458755183e26. 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/USC4C1000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2a30529cd3c99635c0239f1968c5f330f7dcbd81b6622a6f3bb1c8fa6392bd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USC4C1000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12191a17651b46de3c36b0c830f3685cc3ec741b9b12863f2b3e37b26c7c491b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USC4C1000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9898c4eed0e15da89022ac45a09bf55eb14ef20b4c42d741b01220465710d975. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USC4C1000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726f2f042dad02a4fb57ff14b9df2cf3aef678731b2eb7549eb185d128240e33. 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/USC4C1000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3469f46bcdddd1a350fe41ca768cb17b9971ca902748a9cbd6561e707ae9ac. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USC4C1000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd67c001418f5314da7a142252847d905ab26056086efbd572c29753c03f57b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USC4C1000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6183bf19040ff9f5852d91627e16d5bbb352442ea62bfe4f28bf57671f611e41. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/USC4C1000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b130c3a983b0f854ca82d091307db1c2aa46f4dffc84b7c64ae999ced665ce2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USC4C1000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b558ecce8cd97528aa896260dedecb16ef5a5b93ea7608a89c3d38223215fc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USC4C1000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed2ca4615cd9ee23c0ad1b45532e7beb970cbd245c3503073a4c2e793881e55. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/USC4C1000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f03712ddbe9a5b6b6580f79ac225cb0f682040f903ef4250ed790003b75e32. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USC4C1000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11365cc2a938c82a9aabf016f1581a8d5137a4ebec520b0795aaf5c008a1d093. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USC4C1000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa886e9555782b078cab1135b74384de786772dd71c85dd0493b58ab848b544. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USC4C1000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f769d99884edd87bdcdbf5dc79e4cc0c761d14f675f0d8b20a2e8ab14770ced. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USTCE1091371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4efc93948c1d0cfc46e51ba7399e33fcfad864abe862c87dce18a0641c5f222. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USTCE1091379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48901b6b69f5c9d7bb88e43767737131b6183cac49a87d6022fe62e53dc15264. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USC4C1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39f4d2cbf5ab8b82a6606c86e4732b481f768cbb26c216992c0ccefb4c44590. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USC4C1400011.
K'shoshana / D'ror Yikra (Like a Rose / Call for Freedom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2031fc4778d4beb14bbd1fb44ad440d19b1cdb64fd45b5fc8ffbee67aef3da9. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USC4C1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1f63f9dbfb7fb6fd4f1dfffc37822f2a31a736c1b1cfb813b55798bd71b142. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USC4C1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58aefd63a5979e8d63f8442fe79df8302527bed1a9c6606182c6a2a5e1f7c0d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USCGJ1833897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6573b473f0e6027e875c2a5b614f12627ddba0842ffc581ba4576d8823c4f37f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USCGJ1833898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d82ca5c4d769b620389a5d25f2851c1a97472bec01b592d33710363e9edd1e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USCGJ1833905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dbb8aaa57f5ff5b149d3953c4894fa726b384dbdb543b8ef489b746b05c5d8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USCGJ1833910.