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 0x3c1760fff77d7cb0f22c33527049eab209380e3a1acf6e7bdffb8f224849d549. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b23ff618-1bdc-4f1f-b771-c799b3b22b9b.json and https://artists.proofprofile.net/proofs/artist/b23ff618-1bdc-4f1f-b771-c799b3b22b9b.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 0xa868a3337f6a36fcbe2d8d4e67234f84adb0ac1d904b2db192c12e5142c76ec8. 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/GBWUL2306005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faf6bf53900a53b5bed56e4a1980a483b0e17b3796df2fcdebd430855f7f516. 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/GBWUL2306084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e90e06aa873e6939b7822996e6f712f09680324ff815d548abdd38deb17ffb. 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/GBWUL2306086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6234f0ee2081d907c5887c9cda2c684bc885bb6456b392e34c174611685a508e. 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/GBWUL2306089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76ee8ac720cd05b3cefb060e6cb4981e79d0335466a0abb8159a3444b1c097f. 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/DGA052294347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616c4427c8a9de95c32e253117af446519324d7122f7626f9376621e83d801db. 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/ARQIW2406424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f0b587fa69e01dee8afcebff5211d15bf63f344f548afbc01c78a0e84c0fa1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWV32362958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2056213c4e873c90c7b7c396a983dbe2df6a4bcc5ba6943a37644e5d708c5ada. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWV32362964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0e18742e69757d6f8d8be1fa9f8479873008a822c7da3c62d2cc2731c4869. 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/QZWV32362966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df28caea635e87df700cc21d243e9f184ec198ec8af4c9865244a6dfdc4f393. 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/QZWV32330272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c99669be2772f25530ac59a4f84446fb9035c86e3c3a43359fa1bb261db4019. 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/QZWV32330273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b687f5e6dc88456ad319e6e54ed5b7ae3580ea6279f1216a4b4fceeb406d3a0. 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/QZWV32330274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112a49b03f03de2781a23215e0ca0d9c8145c634f73c63371d43e4f0b22a9154. 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/QZWDE2398521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a35018adbc729d2e33609b123e4f92315d97b9f589d18990a5694da6e77c35f. 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/QZWDE2398522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b642196cc0766dc85492c2b3adb7c538246e67a0f28f739027fdcfb7fd8c8a8. 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/QZWDE2398523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42377b4f39694776916378377f993e9bdd1b96dab5eb9cfe6a9729399305788. 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/QZWDE2398525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5400c2257573333ee7c660226006abbbf5350cfc609849bbd2530a9e9bae4b0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWDE2398526.
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 0x7bd61c7ccef641ca8440df7bbe67d2c793323f9acf0680a120112014c727e29c. 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/QZWDE2363172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c04112e630c15fd1d80062beb1d15c22785cf8d960b849d8794e43d81838dc. 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/QZWDE2363262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25198433d7dece8af2f3646a60a45aecc4ded0a3c290c4af32f0100d32472c5a. 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/QZWDE2363049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e346101fedc8a55f1ad3f6326b9f5b148e3ed95add57cca10d89bb360ad3491. 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/QZWDD2369853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8920542665c648f79ef3be9b8a58d39caad9ff635804b45fded6d785549fb471. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZWDD2369854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9cd168b058b3abb62d7121789ef8e8f3cf3b1ba7050b0e254dcee87454c677. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZWDD2369855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bf3731264cebbc3a8913f3289efd2390ef3e989ab4d3b14a642f4dc4a7f627. 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/QZWDD2334975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0c39368e528bbc64d6b540ca3b1493f88d5d41e9e7f125f79a1b7a50300533. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZWDD2334971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f4b7ca2a62bfde5b7e08d9a4d0479961194c77a865d629fa92d82973b37fa3. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZWDD2334972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786a1d42a103dad1ed26c5b39325ac903c7d0f24aace02b3073a949aee5aab1c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZWDD2334973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb51b4819722e3b49005269e6775a8447f8793b0e7e275056c6f313cccad4f. 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/QZWDD2308784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfd0969eaee08a8a804a89e2d492708ae460408c77f830d91da584b74741138. 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/QZWDD2308785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75ddb38b55656e6ab998a8d8ee35b526aa933575fd8e4d05e56527ad2097688. 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/QZTV32396590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc445dfb12e7932f6d56e8e0b6114069ffe938d4309852c37f83ca2537fa5c304. 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/QZTV32396587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf6aadac3dc5a4ad27a4d28a45137601f1a3cb342b62c4dcb663a677095442d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZTV32396589.