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 0x805764c040009e4f20709a8b04e5b903dfe5ff68ecee9083e5a580d6fd652323. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bef82941-63ca-4594-b638-c22eb674dafc.json and https://artists.proofprofile.net/proofs/artist/bef82941-63ca-4594-b638-c22eb674dafc.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 0x1fad7dd3c6a3ed6ba690e3f9073840df1ab8515b7bd46662da47953ef23c27ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2233811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc350e576fb8db95eb9a789878d2c68111f5ed6d03bb40614547ba8bd22735a8a. 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/USANG2209853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd2b6ddc39ce75506817db16f61f8f9bd3283f3c6388842567baf3604425b1a. 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/USANG2233436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ca70e646c56aef0eb7fa1e1e679fa3db170b9983f5431ed4e57124ca29dc36. 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/USANG2233437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f754c0e7e06fa0518a4ea708ad6e2ec78b9262fe622d4c84567dc58518d1aa2. 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/USANG2233796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d14a371a50acb110bce81677d2e1eb0b29aec46f45b2e61d7128bab51d89d84. 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/USANG2233806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c102eee5b578c3d78994971faacef423136ecb4773c530a3378366d618ed0ea. 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/USANG2233809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fad7dd3c6a3ed6ba690e3f9073840df1ab8515b7bd46662da47953ef23c27ad. 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/USANG2233811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fc22e292a94ba76cb0797f5de97dfbd1aecc79a38ae6b2a0242eb6cad45c28. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2261631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556272594c75411e4a910949221f5de8dc4b60c11e081686ebb8d26ba3cbd758. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2261639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7084f7ee63e50e541e7315d0963637b1aa93760860003ce07563baa5b154b6. 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/USANG2261649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6d54f9a8b47231c88851bd7e968bb2a6c3cfe21157365fa55c56ae6ffc0de1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2261651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48760d44d54ab6b4feb7a3c7dddd9e40456273d2742876df4d910234c3e0711. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2261654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf83b3b7a8fe927781a593fb7443609eb3bbeac43e7d088754bea888368046e3. 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/USANG2261656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd289b4d95f12aee20f5160af76d470e5a94fab6dd15358e08558d4b1515957a. 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/USANG2261659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed47093ca4a0de330479a3f1ceae7826cc81e03c0213e50c89239e51c426ec2. 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/USANG2261948.