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 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 0x6f66847709fed44de2f753e234c424f295ac8b3c4162715dfda5ff454dde2598. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb343542-8a7b-485e-a3d9-4b474064bebc.json and https://artists.proofprofile.net/proofs/artist/cb343542-8a7b-485e-a3d9-4b474064bebc.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 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 0x327e2e8aa2dbd22692a4e9a487a4391aaa17db16470a8eb335602c8b7b02a3c9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BCJ1H2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dd43bd935db77aa28d71e8976e36e01fe534c827b834bd4f1ecbe884cbda80. 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/BCJ1H2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4e778e5ed33df6bb6a14ca06397e1a65a5137a91b7807399fd38c2a43cd118. 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/BCJ1H2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8704f49314566cccee4666a8e6a4f1f0bce6da2dfbf0a85543fe648de4dd7e. 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/QZNJW2290832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3977fc44a061165f6de6ed1787472e201731a133b2a10fcd7f9534afe95e55e2. 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/BRMZ72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d4ea91674178ade1f0b451109b4ab7f09cb7c1d0fb1a8b7c1483165177d54f. 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/BRMZ72400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e470c671a992348db3f1dd2f401e493d8280e268892f3568b9b5b1203ecbc. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/BRMZ72400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bba40f8bf4a749a1151638a71027bd9b8416fa2666788e691abcc54298475eb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRMZ72400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c43d51d87385af7e976921ddf0008da7a8b0f6da36d6190d2df5d0e9dbdb787. 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/BRMZ72400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a528b2aae826109bd44c839f4ad2b8f216382fe09541bde539f455b5d13116. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/BRMZ72400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b25a5a5bb0ceca42f16264a886d30fbac82a615514ddd339ad6d22aed7ec9e. 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/BRMZ72400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d20b8de9e589aeec4feecc142ebad69cd695fb79b9d9206d7e2704e75caceb. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BRMZ72400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73361c73a9aabc6159c0fe5117bfeba3016b7c80815c9fa0942c6803df7037ba. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BRMZ72400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9081745c4e1a41bc58e9483e25dd748175870a109fe314b7de7a740bc7f6d33b. 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/BRMZ72400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba62fe12009433931094f80a6734ef93a742a0e6d6689494b70cd21fcc37d6f. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BRMZ72400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3027fb74079115512577fc3214a650429aef66c84a4161bb3b0512e0784cdbc. 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/BRMZ72400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835e61544eb67c223f4573c724b91b596191b36597de796402eeff9abbde36ad. 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/BRMZ72400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c898841d4527fe80507d25d83f13776ea77ebe8ca722c31e0c2e8386709f49. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BRMZ72400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ddf7d5674bbd495241bee30322a868f744482b977b497fc9b48a92bb938adb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRMZ72400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612e4edcb6522fc2bace49b9f8dc6b0ed7ae12ef2fc57652959d42980a3a3724. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRMZ72400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2756ba610e4323e87cb010ed8201f168c51d9a480ffcabe61aabd42244484226. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRMZ72400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197fa2d488f8893c67249ee23294b668ada4a25f5ab57d9345aeecd3cd93bdb7. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BRMZ72400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf436532eb46d6442e5bbaf7ce94d1b49eb9e8e589ff8be5cd72e609bd206f30c. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BRMZ72400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd08c3de85b9db21df42f5fa3e8369fb30eb6b011e4609da2854379624ee5253. 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/BRMZ72400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa7e500a55147157b5b6332469ecacea61ffd565565f1022069031c06892341. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRMZ72400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad2aabad23ecf24002cf3491e0b493351a0d644abf593c1829823ab0ee5627. 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/BRMZ72400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65720ef0136a722ea2fc7abf6b7417128349c1e26aa1493d464792a91b4b7abb. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/BRMZ72400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f34b222530b9fbe573e8fbdbb29fa2af9cb065bdfacb34bab835a6a273cf538. 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/BRMZ72400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c7e8aa9a0c395f32231f7f2ef59e456ea44dacb79bc311b8111dce33623c9d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BRMZ72400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78d00361b0396c0b9cc5e8d31d42b4b155bb770114f033093374a57839f3969. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BRMZ72400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e724b7378aac93210fab6023a7a20372aaf81a0d432e9857dc03ad8e103208e. 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/BRMZ72400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6fce7d9eb9e5e0eb7ef04ebf8db49c5307c558e326900ee260aa89b31a51b1. 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/BRMZ72400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e27b67a24b569f5c79621f6aeef1a103bd2da3f1cbe0bc5edf2b6fc33984de. 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/BRMZ72400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01450747d884a8b4654aed047fbdfde56cf9a97a2170cb546804b8f4c1a0fb87. 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/BRMZ72400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1356e3ec98059b49448561b66556ffd33e2cff2a081635dbd42b025e75d6169e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/BX7HO2500001.