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 0xbef04d79e5e76394dd51f176aecd5ea863fcf1309bdfebbdcbee3f2c986a4283. 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/bb222dcc-b844-4a7f-be5f-7c9e33536fdc.json and https://artists.proofprofile.net/proofs/artist/bb222dcc-b844-4a7f-be5f-7c9e33536fdc.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 0xe0ea4f6cd6707e1ff8716ded447675422764cc6b7277c90cccacfeef70f490c4. 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/USYBL1402054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbe9c54b52bb403fc9cdb5e26348f75902a2e87ca7106af001c8772b4ae16ed. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:06:00Z), 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/USYBL1402057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7446980489ca044b0515614297eb907ba02d483f15ddda885a388b80888d7072. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USYBL1600609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6414731549852295fb3031c51cf09ec0334cc9ce8be49f7d7dfa083738d566e1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USYBL1701095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1d9a86ffd8e38c8d2939e94317cf3cecfcafe339cc3c112f056f1ba39cc970. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USYBL1701096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc111a8b6c4a7f087ae39ba3d07177b68106f9c661b85a27d9667e90e0ad234bb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USYBL1801205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc63002e6b94ba53a145e7022e06558a57014a382dc7061c61fa82608932337a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T16:00:20Z), 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/US2641943001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81811f9986560d97ee01b9ef83e6b6240c23cda4767a27f32e3a5d837d11db53. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:28Z), 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/US2641943002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3fe44bf8681bab60955d95e94dd0671e2308e9e49cf5b0c5c007c61d76b1ac. 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/US2641943006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6365df855162511c22f0f069114e32ecb22133c121cd6659b9825d82a37a68. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USYBL2000954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc643ec92fd78cf3520eab64ee7037c320af4855e672616153df7a24287b219c3. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:37:13Z), 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/USYBL2000956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838e765fa538338413c6a242a6fcc1a53f79ae9cb03d5f1b23ad3328baecbfb7. 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/US2642041201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd706768f08b433d78c9deaba09052bbdc20f944f43a6437d642a516587b8fc89. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:07:43Z), 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/US2642148305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91811fed6d044d6f034dd4044f469426dadfbed3b935abf47cc51a7a1662837c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/US2642354401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f94f62a9985539fce6261c2c57960d2ada52ebaa3de22bd4d06091525b43c73. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US2642354402.