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 0x8880e263913a63118c225daad7392b4ab9cc5dbbc22a87a4dc3eb16cc526e1d0. 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/bf99da6d-2b9c-44e3-9377-afb38b0b1f32.json and https://artists.proofprofile.net/proofs/artist/bf99da6d-2b9c-44e3-9377-afb38b0b1f32.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 0xb53c2cfcf920027347d43dbdf5010a1460744d7af93d8483d316f56dbcfc57cb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR6V80607631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50afa3081f4384901ebb615d6b1202fe002d8e98b7ce0b4811136df495f09fe. 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/FR6V80607632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b34fc9ba08107f8aa511d873e99eb962b2dacf8e3d42523f72f538becf8570. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR6V80607633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b2ee1649b9cd995bfdaecf2ef9b7f3f9f9c1d8d1b9756979a1d811708a2e24. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR6V80607634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6a2b936902048fbb9f7270e1f5ca0f60ad8e6f75bff79e4491ca20fa0fdfa2. 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/FR6V80607636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6702115374a5bc17e4dd91b3d22cba5b8764ab77f115fffaf78a55dbf4a155e5. 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/FR6V80607637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53edda5060eb6806778e996d1be84ccf5dddb44847e642378799f0497c403fa. 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/FR6V80607642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dec9c992854a052320f95c0445fc1ebff9203285794bf4a4e5eb5f8e10d545c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR6V80607635.
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 0x9528b2c9035d8f71813ac1dcc9a374b56ce3054f70426c9001335e516f616dde. 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/FRZ010302510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb305938df8ecd9f766a1e6c3a4d99febb6504c34ed850479ee1f905ea703025. 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/FRZ010302540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72375aec4d374752dd2c1180ee15ab6fdc97a547c8a3cfd2cbe75aea30876720. 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/FRZ010302550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ffc0373a4b4cf5df51a8ad32a8a40522a033ddb2c4cfe6a965c7a942ebdc84. 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/FRZ010302530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1d6c0763707d60118a1e22d74f8ecefffb490e3d23fe5f632187f44be42ca3. 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/FRZ010302570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37970423d0f05ba96d74fda25d26bc2dd6532e0d6a881c32448419b968c5891. 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/FRZ010302590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc575918bd08f83c1557c6a72e059ca5eedc8ab1e37d0999f9c62c78aaef60c32. 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/FRZ010303280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e8a1d842c0e1fa2e5e7b31d4650d4890b3273f8ce704808d36159d0ba308f7. 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/FRZ010302380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69628d84291d407b959e2f33288d5f08b84ff1b4cf31ed9aae329f35ed669478. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRZ010302610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5a311e9581c6c46b2e7f42ee7d1ecb69ef8788eb6af8c031e758ff4c301c1c. 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/FRZ010200560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aafe8621f34099888b5ddadd579d2634cac3de629ce0342bc8d11b26f53f17. 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/FRZ010200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8011c3425d89c3ca6361829d4c78c3dcfd6a2f222aa53e0307ab379fdd41776. 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/FRZ010200600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98df7bade32defb94e6745dc548cf657e899e8192c8e0e209aee894f4388f68d. 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/FRZ010200640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2a169b48dc85b2be2e4674bc53b536cf16fc6b6d2f21df742532375cbe28d3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ010200650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afb6a0a0b93f7f095d911ce205b0909591311261aa5ac76a2e2c65a39f0dc8c. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FRZ010200610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414216d13d3b52d1fd3910b7ab9a4d4440471dd95b871894a197273530b86cbf. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRZ010200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeeb3d8dfcb620b83e1604526fe9646c30c499600abfc606801eecceadb789d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRZ010200570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f056117a84a97e81bced3eb519e9e36378c6efed37f28d5d3af802f69d3f5eb. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRZ010200660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9f06bcf0bbf1961fb0b83267f72e81db65cdbfe5c09bb543f0a56e4dc25571. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRZ010200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf56b497d3b1003cad37f92c97186f8b8fd5f8b1464ccfeda7a0721a7a6b5a95. 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/FR6F31000990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaff8610b93407e8bd65ee3529577ec1171db8c59a7b3dee5bd348809b76e18c. 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/FR6V80605541.