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 0x9607161ab33a1e3a8bc048f3430424d30c0ece68d3f3c4daba6d084a47f7192e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97309a58-890b-40b8-9008-d347c977f1fb.json and https://artists.proofprofile.net/proofs/artist/97309a58-890b-40b8-9008-d347c977f1fb.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 0xff3c93c46f3729a9173795a7422caeeb94bd5b7bbab0470d8bb2826194614a32. 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/TWAE32100700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ec86dea68dee64c1b01bb3552c2cd771d6e4a4d2e5b11971f64e9ed7714397. 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/TWAE32100706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb4850a522c8a86d1f00df05dd9ff225f33ef47f52e6c822f8927771094ba10. 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/TWAE32100719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cb3f6b05d613fd31ab1883bf8710f57931ead03120eeec77fd36aa85e39602. 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/TWDL72400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ccd95873e14b900ec083f3f94a7dc31bd487cfe8e608d52194ad11b4e17b1e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TWDL72308059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb491fde7dbcacc1cb440742ddad85178993912145304733fc7c6c646912b5c. 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/HKG732103508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3da79d4407d7dca4af61cefe25909bc7031f05620d37878cee3de24ba7fe7c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:50:48Z), 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/HKG732103509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cdc6bf2a4ca38ca164db2abd3c5e94f28384052ee88c2c02dc6f21c7167afe. 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/HKG732103510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8bf264fcf1a808c609ca7cb3a08e56ebd5cb8735d567f71dce5eb69ffc64dd. 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/HKG732103511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e22776fe8177cf03a31462c097784e5e5d9f99571be382cc4381a1e802aeb6. 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/HKG732103512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798b753328d1305c2ed57009fa9d0d1f2aa37c57be5115b15b4c6cd4351a8af9. 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/HKG732103513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c10c10fa9f91bb1da98481824068aa049cc6826608de7da167c33865fc9763. 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/HKG731604472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ca7613584692508bfc6b7f497bf973277ccae1928f58253f3a3010e734c9a7. 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/HKG731604477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb65ac98976a1726b5a3b5617075c2d0ca7ae515a8da82715fa888ec17e8d8a0. 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/HKG731604474.
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 0x5053c1958ff8c8a16bd592ecaab348474e740b50659befc3666318338ded7da2. 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/QM6N22548516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca259c07f5d0f8814f2718dc62658d9831f67ec11f8ab451bacc20ffaa7e6ed. 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/QM6N22548517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e90748ed2de814ca14c029cbac227663456636cfce59c5c41476bf033dd2241. 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/QM6N22548518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea5c39b3143723ddda7480c8b7552bc414da4261e172d66ab62c6ea62310ce3. 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/QM6N22548519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb260772e8d663ffa79e212b26a63ffed700a251b6017599bcf6de952c26f6d. 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/QMDA72407892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50efe51304e3ad96fb2c0954042aead5e056f82e49e981dc834bc7e2e1a75125. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QMDA72407893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90257c262b7abcdac0e448cf2e3a009562179454a7192029d60e6e24d20a580. 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/QMDA72407895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb968c08458b01e482cd584a158af9a0469fe1ebe6ae196602c6c23304d8928f6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMDA72407897.