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 0x61dcd7a244bb4c3017938a0f61b21f2181197b41c86a2f71587d7e9e7839c2bd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e71b7f0-56c8-4137-a513-37c5a1155da7.json and https://artists.proofprofile.net/proofs/artist/6e71b7f0-56c8-4137-a513-37c5a1155da7.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 0x52704351ec7a87c610376458b56d0773f7ae77c117264eaef273fc53fd315b89. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA0UN1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414aea1856352aee26597a3923cf0bfd70fc2bd61e7425a3f0c3b861794119c2. 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/CA0UN1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf746a2adb24880e2f1235921a3f3e662be8d1197568402fceb29af52c236c536. 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/CA0UN1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd116569abaaa4f7a5736e53cc20388899ac4c0617d96eb72a095ec1272432e73. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/CA0UN1900002.
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 0x5cd647ff7484f171312f0a181893bea062706eb5021fc95b5d0ad60697b410d7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CA0UN1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5000a0e0c3b97c1402779102d6b5a99d454edf438b604c4c535992315fd97771. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CA0UN1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8971c41c96a098182d8befd2ee5b82474f68950893d183db5c2876d9ad03c13f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CA0UN1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb02a383c3ced3afe6c67a77c245350c31b00a99122d167b82021afe2c431cff. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA0UN1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496d2834d03cdff369ba4219132376dd7aeb513d35fa15622564467562f4c00d. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CA0UN1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d11f93a7ca99af9975f246bfc5c23e796e94aa92ad3e63cfaf2d7d7e87467d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CA0UN1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf2f83c489491e484f9b5394b412e0752e12bff0fdc10c546f2f020c97cf812. 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/CA0UN0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71155cc1ebcd05e8263acfe77cb07b38fde30919728c2758954895cf1b6eae4e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA0UN0900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ceb704495e307dfa804afd1e42babea6138ed4e0b3ca44d1240448ad9abeef. 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/CA0UN0900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af2f833c8c0b641eadaef82968ead4387e17a70e7b2c087106987248dbce839. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA0UN0900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3678c2dc2af123406dbbcf10aab39836f5d774bef511e16cfa7e4303f6f9b50. 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/CA0UN0900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ce907363dfa52ac24846c5ddffa570f91ea39b96c6543b5dc503308f9a0c26. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/CA0UN0900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9668467fb1c6942e915563b785bf61a7556b33465e756e4796c87d73e099d3d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA0UN0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89688de840fb1df14463ba9abd6d73066180c5beba71e6e956ea95817e48d9a7. 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/CA0UN0900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7145f1239cb5c348625a183dc6a3debe2f3a3e561f476d565a9917ae8ef970d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CA0UN0900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d6e62370d36113a9e6eb39029b6587ca875ebc2ba8cb78b6fe73b9d9724e41. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USC4R2109047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f9d94db16c2d8f1ab9e6f61f61a5382db59c8018e09718d416b92acb745c3a. 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/USC4R2109048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457b1fbe34707d9f5959d503d6226feb1faafc7a773ad3d1d238716eca20c12d. 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/USC4R2109050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a274cb585b4b43c1199c6975e23b5a5f2e0d4c94dfdd23d2856c9877f4075f7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USC4R2109054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c22bc622c403d570fa90cc3c040c578972c3a52236ca0659568b94c2b80f42. 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/USC4R2109055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8159582632cf9886125af8a26ea94c6a31d17d0528968e54f10d48e9ccfd882a. 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/USC4R2109059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee293d232c57cb10e31b14b8c1097487452aee3e5c4f6e318a4f2a6c2ce8342. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USC4R2109058.