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 0x5bad5cc84a06fe018d7642938fba72292879dc1e006f1556ef9b7784332a42bc. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f78f3fa3-874a-4f9e-8cca-5eb593331ce8.json and https://artists.proofprofile.net/proofs/artist/f78f3fa3-874a-4f9e-8cca-5eb593331ce8.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 0xea2ad3de82952842969def79abeb5b75b4f78ee61aba0d8e0510ba15a8234946. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CADC41103894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2ad3de82952842969def79abeb5b75b4f78ee61aba0d8e0510ba15a8234946. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CADC41103894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215a148384cfbbb26fbfa8645df184be845252a3c9c61ce5263bfe3770e3937e. 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/CAP901700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215a148384cfbbb26fbfa8645df184be845252a3c9c61ce5263bfe3770e3937e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CAP901700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df008a4db71c2629918de56172f3f8a95eae85a3cc93cea9e2d733ce4b417c8. 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/CAP902000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b7abf7132e564565c0245ecd32d17fb9f29c31fc48fb9b84c913b25b6818d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:36:39Z), 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/CAP902100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df008a4db71c2629918de56172f3f8a95eae85a3cc93cea9e2d733ce4b417c8. 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/CAP902000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b7abf7132e564565c0245ecd32d17fb9f29c31fc48fb9b84c913b25b6818d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CAP902100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17546145d6aa2b8d8c2ca01afa0e0719f70ac45dfa1cc7adc662e95b3aa836a8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CAP902300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17546145d6aa2b8d8c2ca01afa0e0719f70ac45dfa1cc7adc662e95b3aa836a8. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:12Z), 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/CAP902300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f98fff9f49cf01736bf51a8200f49fb76aba12cd4b9efc6c09549a4e697cb8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAP902500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22c5bf6651554217aef1359c58c69e1bdac1efa33994b784d0a1becca42fe48. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAP902500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4463577b4f97c7a9ff346c5d4a25ceb247c744c86ea355b611e9ef0673e0f872. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/CAP902500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5d6ff4fad0ea58ea797baf6a4afd627dd3be514cd4f1eee76a72655d841627. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CAP902500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884154be90c83ed87473c629110606fa532686492ccb4f1aa78ce44213069932. 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/CAB580303013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3495cdd391d12d13d0e97cc6fed9e5c58a71a2a2660438b9a536903d91c0eeee. 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/CA2WV1000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16075a4a0665f0c283f410aebc4ed31ab8b118df440835d73c5572659e5ce19. 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/FR59R2067758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c93f35b714c195d708b7ff0f2fbae7d1f971e216bd3f35ad036e0ef99a4d6f. 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/CAC0C1300262.
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 0x6d735998a5b680e047275a9a21e380fab985945d8b9fc3c26bd3de66b346f66f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA3YN1700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8bc519043df3c002388c96779da9429de8df8c64beb48e91ac1b6b6d1e3dcf. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/CAE562329401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b58316a3dc04d97b6e066a335e4af3dc2c373479e247f4ce74a1542e26eb3f1. 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/CAP902400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4450bb1bc8c95713a6dafb2ea7fe9c757ab88431e8a1cc74411cf464b7b3c807. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FR2X41959983.