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 0x0a7032c6265ac5ac17f5adadc8fe1037eac07897ba958bcfa1bafd7b386c638c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fab6cbb3-e1c3-4e94-baca-b143e18cbb10.json and https://artists.proofprofile.net/proofs/artist/fab6cbb3-e1c3-4e94-baca-b143e18cbb10.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 0x6e7f50b3f957b5af32bf02d37f3546cc77e715f24c60120caabd2adc2842b57f. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCADF1742660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0b6b303d19a8414a836a7674ca64a4cb404e7d981b940e48e9e8fccabd4e23. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCADF1742703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba54e8a8cdd520478edfc239e3d72af83dae222203879ee8bb07cf91ab7c1bf7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCADF1742713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34c106e8fc7fb6d2c1efebab13e342c3429e4a25a96750788d920931f9c0a69. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCADF1742722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeb3013cb4f2201588975c7aef6d8e4b75e1d981a400b2b58fa0ec1a54fcb3e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADF1742739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6944ba6de0079e9b894ceec6df2efaae66bcccd6c465f78b21db911fdaff79d7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA71830565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566921e2dec9b9df9b4010d5a268fff6e7cca927bac1073ef0047f99642a1c31. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:46:20Z), 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/QZB4J1865198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f675e709b26f058571e7f7857840b05b4aa583ae75b1bb11a3a3ea420775f3. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZK6P1959606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f87b8c20e000de664c21a19edde698399b3118fe38a9c8ed1672a402afb844. 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/QZHNB2085959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85cd4aa4e71cd089311782523b5a5a9d8b35ebc00a415e684a66b434a64d957. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZHNB2085963.
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 0x3327678fef1a8658cb9f7c808ca090afb07861f0b6ea9d5f3b3befc4b30be172. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZHNB2085965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4914d6fd9dd5b783402f7b781c39b9e020a7401ffdfc2a6a696e0901841433. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZHNB2085967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee64d394fe05e6d844f2bd43091cbff469b79d2f8603b2c43145f98e6461d5c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6G2242988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e85c06b40120291c6a86cce9766fa57301b5ac78d5de9841dbf383696e5e05b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMER2346031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5627f96503f3334c69c1853a5b4cd732336ad881498b48883c9431f63842bd. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZTB72399499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3253316d31c26e891ebc6aff4c2e5b769659ac16e81db02a6fb17766f97c6880. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFV2464489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a99c09ec167edf3e36b92132004656b2b2af46385a92fb8fe55057424e74402. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QT3EZ2437875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354193500827f71acb8f361036177b336a5b01c9ade3b46bfcd82d1a33e5a432. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QT3EZ2437876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43771d09cde85559ad1128fa0151bc3da0ec8eaba188c8a392f1de16fdf7397b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:23:43Z), 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/QT3EZ2437877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a922ebc78a84338689a73e3ccadebcf921213761933f0055f91e19a3ff48589. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZDA42588938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c9b2362da9879ecdeb271b153b7faebd6bf65ffeccecc51483ae63105966b7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZDA42588939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e93887b52f5da5376f52bb6eb378e22d87ab2996e7c7dfaef06b63224af850f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA42588940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c46abaeb0dc48e0d3ab57ed5ec2bdc00c9f3b4093a21fb83a04a088d32024a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA42588941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7fb1a125688d8d26120f6d69a86a11aedcef8365dadeec29450410e00c3910. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZDA42588942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcbb2f973c38592817027fa215235072db9fb242e7ef925e1f56b7ad8aaca2e. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZDA42588943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd135e3db98d8a909ca6a6b430aa5e7db0077d028bcacdb1cdc2bd280c96701dc. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:32:24Z), 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/QZDA42588944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9103c44302f870fac37a1d4ad9b5fdab8270772d1c2378e040c9ff34daf0d7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA42588945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3063f65f2a28d1a90ec4215c228a490718715f52d2143926f030bce45f23de84. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZDA42588946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75df841e69fcfe9b2a70dbd0493c788bbd6c47601676e2cbfc8534f10ad81b1c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES82573142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f5332e7aba1f18254597ea1cac76454bfaa8676ef0ec767e0cab22778591ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWX2556749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821e515ec7d4ab9caaa09dfd23d207ffd3d1b1bc2a2d92d1a38ed27206dfbdaa. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:28:11Z), 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/QZNWX2556750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc901306edb0c1f5c59819d3da3488e1bfc2fdcc9578696a64e47c65e332ea9fd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:33Z), 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/QZNWX2556751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b943fdb90da5b34fa72013b3ef1029da287eadbc4b4b01a65577b81b2cb2d8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWX2556753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e91a41e2692f986d640c17b7f9f2c8f795e7825f0889310b673101f8acd67e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWX2556755.