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 0x01577fe53e255a5de0f1af259f37122f96acff5d14bc9be2a69695aa4248ab0e. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16eec01b-3485-4b2b-aa8a-45b665653e72.json and https://artists.proofprofile.net/proofs/artist/16eec01b-3485-4b2b-aa8a-45b665653e72.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 0x1da7783730a91297723e65dd89082be75249160cc5b738a356a4c35e8c3a4f86. 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/QZDA42413027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fde05b01e39448c7d9198a3f76c291f788971eecb3db266415a7d9aac1ecec. 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/QZDA42413028.
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 0xa2d183805b43ae325e4dd9536cd59ccff5991b12203ad43b09a16b9f99a4cdb4. 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/QZDA42413031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe172933325a97ae46f518e7ad30a00c2ae4294354c4f6bc4925b337816ffe6f3. 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/QZDA42413032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbb35d8d6fa5c27d948d668a2008b1f1943589ddd8729a968eceb0d5251ef31. 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/QZDA42413037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb989c0b88ae3850118c0e6a06370e1fef1566cb760cabbaf6e6af90407b22708. 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/USHM90786507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537d32ab5996a442a34e5395298eb7cb2be6d0b67c2f42ca1dec5f81110f26d2. 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/USHM90786510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bff3ea3b63ad77245bd087e8e9acea3cb538f4b3d7af422094eb4d1d86464c0. 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/USHM90786508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eab80867bbd8317b5ce0ed71a8089f2e01c5173f8d8d6b1646a6685c61b5f6f. 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/USHM90786509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2652456237f3a82ba80f56190678961f843cccdd738a5bd85bfd5527a761bda. 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/US2640697001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548781a199ed7fac4f83c3d7b2c1040f18977f86b6322b142e21a1201858d62. 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/US2640697002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce52ee4405c7b2ba9b8004c78f936215e2403114993c42586b89698169f834b. 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/US2640697003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4ef985a9726dbf8f7a8690ee91e85f3bc2c98795b2ac11d1650a11e19d3fde. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US2640697005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d052e80f651f9ba0fff498d0239e4146d82895bf1671fe02ce4525d4913f841. 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/US2640697006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702a54dac85d787fa1b7c75c8701c97a9d9aa01718ba3aad354c91efd82bea08. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:09:00Z), 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/US2640697004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351de897797b48d2e33bb7b899167cfe6674384a6ac8a11918f7657fb6b73b5c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US2640697007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd204fb8cd2034901f99ad416ba07a89b5066fac86ee78931e67f83f52993d99. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US2640697008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4698954f894408371528efe7c859e0d59b214ecfaed2dbf4527b40b2ab7f02c6. 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/GBSMU0110793.